CN111253660A - Creep-resistant geocell material and preparation method thereof - Google Patents
Creep-resistant geocell material and preparation method thereof Download PDFInfo
- Publication number
- CN111253660A CN111253660A CN202010099726.0A CN202010099726A CN111253660A CN 111253660 A CN111253660 A CN 111253660A CN 202010099726 A CN202010099726 A CN 202010099726A CN 111253660 A CN111253660 A CN 111253660A
- Authority
- CN
- China
- Prior art keywords
- chopped
- creep
- resistant
- parts
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a creep-resistant geocell material which is prepared from the following raw materials in parts by weight: high density polyethylene: 55-65 parts of ethylene-vinyl acetate copolymer: 9-13 parts of chopped fibers: 15-25 parts of ultraviolet absorbent: 0.3-0.8 part of antioxidant: 0.4-0.9 part of interfacial compatilizer: 4-7 parts of a processing aid: 0.6-1.2 parts; the chopped fiber is a mixture of chopped glass fiber, chopped aramid fiber and chopped basalt fiber. The creep-resistant geocell material disclosed by the invention is low in creep ratio and has excellent creep resistance; the cantilever beam notch has high impact strength and good impact resistance; the tensile strength is high, and the mechanical property is good; the bending modulus is high; the comprehensive mechanical property is good.
Description
Technical Field
The invention relates to the technical field of functional polymer materials, in particular to a creep-resistant geocell material and a preparation method thereof.
Background
The geocell is a geosynthetic material with a three-dimensional net structure and a unique three-dimensional structure, can effectively restrain fillers in grids, forms a stable structure layer together with the fillers, shows the engineering effect which cannot be achieved by other planar geosynthetic materials, and is widely applied to the engineering of reinforcing weak roadbed, protecting side slope, building retaining wall and the like.
The polyolefin geocell product is a geosynthetic material which is formed by extrusion molding, slitting and ultrasonic welding of modified polyolefin serving as a raw material and is in a three-dimensional honeycomb structure after being unfolded. Due to the characteristics of long production process, multiple forming procedures, complex and changeable application environment and the like of the geocell, the raw materials for producing the product and the product have the following requirements.
(1) The product has better mechanical property, so that the product is prevented from being damaged by stronger external force, hard object puncture and the like in the construction process and the application process.
(2) The product is used in a complex environment for a long time, and factors such as acid and alkali resistance, mildew resistance and the like are considered when selecting materials.
(3) The material should have good anti-aging performance so as to meet the requirement of long-term stable use in engineering.
(4) The material used by the product has better low and high temperature resistance for the applicability of the use in the south and north.
(5) In order to meet the requirements of the preparation process of the geocell, the material also needs to have better weldability.
(6) The product is required to be neat in overall dimension, consistent in welding distance and consistent in strength of the whole grid system in engineering application.
(7) The product has better component connection function, so as to ensure the consistency of the overall reinforcing strength of the engineering.
However, the polyolefin geocell materials currently used have the following problems:
1. poor creep resistance;
2. the aging resistance is poor; the impact strength of the cantilever beam notch is low; the tensile strength is low; the flexural modulus is small; the comprehensive mechanical property is poor (the physical and mechanical properties are poor);
3. poor low temperature resistance; the high temperature resistance is poor;
in conclusion, the polyolefin geocell material used at present has poor comprehensive use performance, is easy to damage, has limited use environment and short service life.
Based on the situation, the invention provides a creep-resistant geocell material and a preparation method thereof, which can effectively solve the problems.
Disclosure of Invention
The invention aims to provide a creep-resistant geocell material and a preparation method thereof. The creep-resistant geocell material disclosed by the invention is prepared by selecting raw materials and optimizing the content of each raw material, so that the advantages of each raw material are fully exerted, the raw materials complement each other and are mutually promoted, and the prepared creep-resistant geocell material is low in creep ratio and has excellent creep resistance; the cantilever beam notch has high impact strength and good impact resistance; the tensile strength is high, and the mechanical property is good; the bending modulus is high; the comprehensive mechanical property is good.
The creep-resistant geocell material disclosed by the invention has excellent creep resistance and good weather resistance; the modified polymer composite material is a cellular system with a three-dimensional reticular structure formed by ultrasonic needle welding, the structural system can be freely stretched and retracted, can be folded in the transportation process, can be stretched into a three-dimensional grid with a cellular structure in the construction process, and is filled with concrete, gravels, residues, soil and other materials to form a structural body with rigidity and strong lateral limiting force, and the structural body has the characteristics of good mechanical property, terrain adaptability, long-term creep resistance, environmental friendliness and the like.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a creep-resistant geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 55-65 parts of (by weight),
ethylene-vinyl acetate copolymer: 9-13 parts of (A) and (B),
short-cut fiber: 15-25 parts of (A) a water-soluble polymer,
ultraviolet absorber: 0.3 to 0.8 portion of,
antioxidant: 0.4 to 0.9 portion of,
interface compatilizer: 4-7 parts of (a) a solvent,
processing aid: 0.6-1.2 parts;
the chopped fiber is a mixture of chopped glass fiber, chopped aramid fiber and chopped basalt fiber.
The creep-resistant geocell material disclosed by the invention is prepared by selecting raw materials and optimizing the content of each raw material, so that the advantages of each raw material are fully exerted, the raw materials complement each other and are mutually promoted, and the prepared creep-resistant geocell material is low in creep ratio and has excellent creep resistance; the cantilever beam notch has high impact strength and good impact resistance; the tensile strength is high, and the mechanical property is good; the bending modulus is high; the comprehensive mechanical property is good.
In addition, the creep-resistant geocell material has the advantages that the low-temperature brittle point can reach-47 ℃, and the low-temperature resistance is good; the thermal deformation temperature under load can reach 130 ℃, and the high temperature resistance is good; the oxidation induction time can reach 300min, and the aging resistance is good; the three-dimensional grid system has the advantages of good comprehensive use performance, difficulty in damage, long service life, good mechanical property and long-term creep resistance, is suitable for various use environments, is formed by ultrasonic needle type welding, and can be widely applied to the aspects of slope protection, roadbed stabilization, river channel treatment, water and soil conservation, ecological restoration and the like.
The creep-resistant geocell material takes high-density polyethylene as a main raw material, and has better hardness, tensile strength and creep property than low-density polyethylene; the wear resistance, the electrical insulation, the toughness and the cold resistance are good; the chemical stability is good, and the paint is not dissolved in any organic solvent at room temperature, and is resistant to corrosion of acid, alkali and various salts;
the creep-resistant geocell material disclosed by the invention has the advantages that the ethylene-vinyl acetate copolymer with a proper proportion is introduced, the interfacial compatilizer and the processing aid are matched, the homogeneity with other components such as high-density polyethylene is good, a uniform material can be well formed, a good toughening effect is mainly achieved, a certain compatible dispersion effect is achieved, the toughness and the flexibility of the creep-resistant geocell material disclosed by the invention are improved, the brittleness is reduced, the mechanical properties such as the tensile strength and the cantilever beam notch impact strength of the creep-resistant geocell material disclosed by the invention are greatly improved, and the low-temperature resistance of the creep-resistant geocell material disclosed by the invention can be further improved;
the invention introduces chopped fibers with proper proportion; the chopped fiber is a mixture of chopped glass fiber, chopped aramid fiber and chopped basalt fiber. The chopped glass fiber, the chopped aramid fiber and the chopped basalt fiber are matched with the ethylene-vinyl acetate copolymer, the interface compatilizer and the processing aid in the raw material system of the creep-resistant geocell material, and can be well and uniformly dispersed in components such as high-density polyethylene, ethylene-vinyl acetate copolymer and the like, wherein the chopped glass fiber has good rigidity, the chopped aramid fiber has small shrinkage, the chopped basalt fiber has higher rigidity, and the chopped aramid fiber, the chopped aramid fiber and the chopped basalt fiber are matched with each other and have good synergistic effect, so that the tensile strength and the cantilever beam notch impact strength of the creep-resistant geocell material are greatly improved, and the creep resistance of the creep-resistant geocell material is also greatly improved.
Preferably, the creep-resistant geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 60 parts of (a) to (b),
ethylene-vinyl acetate copolymer: 11 parts of (a) to (b),
short-cut fiber: 22 parts of (a) to (b),
ultraviolet absorber: 0.4 part by weight of a reaction kettle,
antioxidant: 0.7 part by weight of a reaction kettle,
interface compatilizer: 5 parts of (a) a mixture of (b),
processing aid: 0.9 part;
the chopped fiber is a mixture of chopped glass fiber, chopped aramid fiber and chopped basalt fiber.
Preferably, the mass ratio of the chopped glass fibers, the chopped aramid fibers and the chopped basalt fibers in the mixture of the chopped glass fibers, the chopped aramid fibers and the chopped basalt fibers is 10: (13-16): (4-6).
Preferably, the high density polyethylene is korean SK 3301.
Preferably, the ethylene-vinyl acetate copolymer is american-style selanibs (EVA) 1210.
Korean SK 3301 has better dimensional stability and smaller shrinkage, and the creep resistance of the creep-resistant geocell material of the invention is further improved by matching with American Sealanib (EVA)1210 and the like.
Preferably, the interfacial compatibilizer is maleic anhydride grafted polyethylene.
Preferably, the ultraviolet absorbent is an ultraviolet absorbent 770.
Preferably, the antioxidant is a mixture of a hindered phenol main antioxidant and a phosphite ester auxiliary antioxidant, and the mass ratio of the hindered phenol main antioxidant to the phosphite ester auxiliary antioxidant is 1: (0.3 to 0.4); the hindered phenol main antioxidant is antioxidant 1790; the phosphite ester auxiliary antioxidant is an antioxidant 626.
The inventor finds out through a large number of experiments that: the antioxidant with the composition is added into the raw material system of the invention as a composite antioxidant, and the two are matched with each other to play a good synergistic effect, so that the antioxidant aging performance of the material of the invention can be greatly improved, and the outdoor use range and the service life of the creep-resistant geocell material in engineering can be further remarkably increased.
Preferably, the processing aid is at least two of stearic acid, zinc stearate and calcium stearate.
The invention also provides a preparation method of the creep-resistant geocell material, which comprises the following steps:
A. weighing each raw material of the creep-resistant geocell material for later use;
B. fully and uniformly mixing the raw materials except the chopped fibers by using a high-speed mixer for 3-5min to obtain a mixture;
C. melt extrusion: feeding the mixture into a double-screw extruder, adding the chopped fibers into the double-screw extruder from a forced feeding device at the middle section of the double-screw extruder, and carrying out melt extrusion and granulation to obtain the creep-resistant geocell material;
in the extrusion process, technological conditions such as the rotating speed of a main machine, the speed ratio of the feeding speed (frequency) and the like are adjusted, so that the creep-resistant geocell material is extruded and granulated uniformly and smoothly.
In the step C, the parameters of the double-screw extruder are set as follows: the temperature of the first zone is 170-180 ℃, the temperature of the second zone is 180-185 ℃, the temperature of the third zone is 185-190 ℃, the temperature of the fourth zone is 190-200 ℃, the temperature of the fifth zone is 195-210 ℃, the temperature of the sixth zone is 200-210 ℃, the temperature of the seventh zone is 200-210 ℃, the temperature of the eighth zone is 200-210 ℃, the temperature of the ninth zone is 200-210 ℃, the temperature of the head is 200-210 ℃, the rotating speed of the host machine is 280-300r/min, and the feeding frequency is 13-20 HZ.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the creep-resistant geocell material disclosed by the invention is prepared by selecting raw materials and optimizing the content of each raw material, so that the advantages of each raw material are fully exerted, the raw materials complement each other and are mutually promoted, and the prepared creep-resistant geocell material is low in creep ratio and has excellent creep resistance; the cantilever beam notch has high impact strength and good impact resistance; the tensile strength is high, and the mechanical property is good; the bending modulus is high; the comprehensive mechanical property is good.
In addition, the creep-resistant geocell material has the advantages that the low-temperature brittle point can reach-47 ℃, and the low-temperature resistance is good; the thermal deformation temperature under load can reach 130 ℃, and the high temperature resistance is good; the oxidation induction time can reach 300min, and the aging resistance is good; the three-dimensional grid system has the advantages of good comprehensive use performance, difficulty in damage, long service life, good mechanical property and long-term creep resistance, is suitable for various use environments, is formed by ultrasonic needle type welding, and can be widely applied to the aspects of slope protection, roadbed stabilization, river channel treatment, water and soil conservation, ecological restoration and the like.
The creep-resistant geocell material disclosed by the invention has excellent creep resistance and good weather resistance; the modified polymer composite material is a cellular system with a three-dimensional reticular structure formed by ultrasonic needle welding, the structural system can be freely stretched and retracted, can be folded in the transportation process, can be stretched into a three-dimensional grid with a cellular structure in the construction process, and is filled with concrete, gravels, residues, soil and other materials to form a structural body with rigidity and strong lateral limiting force, and the structural body has the characteristics of good mechanical property, terrain adaptability, long-term creep resistance, environmental friendliness and the like.
The creep-resistant geocell material takes high-density polyethylene as a main raw material, and has better hardness, tensile strength and creep property than low-density polyethylene; the wear resistance, the electrical insulation, the toughness and the cold resistance are good; the chemical stability is good, and the paint is not dissolved in any organic solvent at room temperature, and is resistant to corrosion of acid, alkali and various salts;
the creep-resistant geocell material disclosed by the invention has the advantages that the ethylene-vinyl acetate copolymer with a proper proportion is introduced, the interfacial compatilizer and the processing aid are matched, the homogeneity with other components such as high-density polyethylene is good, a uniform material can be well formed, a good toughening effect is mainly achieved, a certain compatible dispersion effect is achieved, the toughness and the flexibility of the creep-resistant geocell material disclosed by the invention are improved, the brittleness is reduced, the mechanical properties such as the tensile strength and the cantilever beam notch impact strength of the creep-resistant geocell material disclosed by the invention are greatly improved, and the low-temperature resistance of the creep-resistant geocell material disclosed by the invention can be further improved;
the invention introduces chopped fibers with proper proportion; the chopped fiber is a mixture of chopped glass fiber, chopped aramid fiber and chopped basalt fiber. Preferably, the mass ratio of the chopped glass fibers, the chopped aramid fibers and the chopped basalt fibers in the mixture of the chopped glass fibers, the chopped aramid fibers and the chopped basalt fibers is 10: (13-16): (4-6). The chopped glass fiber, the chopped aramid fiber and the chopped basalt fiber are matched with the ethylene-vinyl acetate copolymer, the interface compatilizer and the processing aid in the raw material system of the creep-resistant geocell material, and can be well and uniformly dispersed in components such as high-density polyethylene, ethylene-vinyl acetate copolymer and the like, wherein the chopped glass fiber has good rigidity, the chopped aramid fiber has small shrinkage, the chopped basalt fiber has higher rigidity, and the chopped aramid fiber, the chopped aramid fiber and the chopped basalt fiber are matched with each other and have good synergistic effect, so that the tensile strength and the cantilever beam notch impact strength of the creep-resistant geocell material are greatly improved, and the creep resistance of the creep-resistant geocell material is also greatly improved.
The preparation method has simple process and simple and convenient operation, and saves manpower and equipment cost.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.
The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
Example 1:
a creep-resistant geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 55-65 parts of (by weight),
ethylene-vinyl acetate copolymer: 9-13 parts of (A) and (B),
short-cut fiber: 15-25 parts of (A) a water-soluble polymer,
ultraviolet absorber: 0.3 to 0.8 portion of,
antioxidant: 0.4 to 0.9 portion of,
interface compatilizer: 4-7 parts of (a) a solvent,
processing aid: 0.6-1.2 parts;
the chopped fiber is a mixture of chopped glass fiber, chopped aramid fiber and chopped basalt fiber.
Preferably, the creep-resistant geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 60 parts of (a) to (b),
ethylene-vinyl acetate copolymer: 11 parts of (a) to (b),
short-cut fiber: 22 parts of (a) to (b),
ultraviolet absorber: 0.4 part by weight of a reaction kettle,
antioxidant: 0.7 part by weight of a reaction kettle,
interface compatilizer: 5 parts of (a) a mixture of (b),
processing aid: 0.9 part;
the chopped fiber is a mixture of chopped glass fiber, chopped aramid fiber and chopped basalt fiber.
Preferably, the mass ratio of the chopped glass fibers, the chopped aramid fibers and the chopped basalt fibers in the mixture of the chopped glass fibers, the chopped aramid fibers and the chopped basalt fibers is 10: (13-16): (4-6).
Preferably, the high density polyethylene is korean SK 3301.
Preferably, the ethylene-vinyl acetate copolymer is american-style selanibs (EVA) 1210.
Preferably, the interfacial compatibilizer is maleic anhydride grafted polyethylene.
Preferably, the ultraviolet absorbent is an ultraviolet absorbent 770.
Preferably, the antioxidant is a mixture of a hindered phenol main antioxidant and a phosphite ester auxiliary antioxidant, and the mass ratio of the hindered phenol main antioxidant to the phosphite ester auxiliary antioxidant is 1: (0.3 to 0.4); the hindered phenol main antioxidant is antioxidant 1790; the phosphite ester auxiliary antioxidant is an antioxidant 626.
Preferably, the processing aid is at least two of stearic acid, zinc stearate and calcium stearate.
The invention also provides a preparation method of the creep-resistant geocell material, which comprises the following steps:
A. weighing each raw material of the creep-resistant geocell material for later use;
B. fully and uniformly mixing the raw materials except the chopped fibers by using a high-speed mixer for 3-5min to obtain a mixture;
C. melt extrusion: feeding the mixture into a double-screw extruder, adding the chopped fibers into the double-screw extruder from a forced feeding device at the middle section of the double-screw extruder, and carrying out melt extrusion and granulation to obtain the creep-resistant geocell material;
in the step C, the parameters of the double-screw extruder are set as follows: the temperature of the first zone is 170-180 ℃, the temperature of the second zone is 180-185 ℃, the temperature of the third zone is 185-190 ℃, the temperature of the fourth zone is 190-200 ℃, the temperature of the fifth zone is 195-210 ℃, the temperature of the sixth zone is 200-210 ℃, the temperature of the seventh zone is 200-210 ℃, the temperature of the eighth zone is 200-210 ℃, the temperature of the ninth zone is 200-210 ℃, the temperature of the head is 200-210 ℃, the rotating speed of the host machine is 280-300r/min, and the feeding frequency is 13-20 HZ.
Example 2:
a creep-resistant geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 55 parts of (a) to (b),
ethylene-vinyl acetate copolymer: 9 parts of (a) to (b),
short-cut fiber: 15 parts of (a) to (b),
ultraviolet absorber: 0.3 part by weight of a reaction kettle,
antioxidant: 0.4 part by weight of a reaction kettle,
interface compatilizer: 4, preparing 4 parts of the mixture,
processing aid: 0.6 part;
the chopped fiber is a mixture of chopped glass fiber, chopped aramid fiber and chopped basalt fiber.
Preferably, the mass ratio of the chopped glass fibers, the chopped aramid fibers and the chopped basalt fibers in the mixture of the chopped glass fibers, the chopped aramid fibers and the chopped basalt fibers is 10: 13: 4.
preferably, the high density polyethylene is korean SK 3301.
Preferably, the ethylene-vinyl acetate copolymer is american-style selanibs (EVA) 1210.
Preferably, the interfacial compatibilizer is maleic anhydride grafted polyethylene.
Preferably, the ultraviolet absorbent is an ultraviolet absorbent 770.
Preferably, the antioxidant is a mixture of a hindered phenol main antioxidant and a phosphite ester auxiliary antioxidant, and the mass ratio of the hindered phenol main antioxidant to the phosphite ester auxiliary antioxidant is 1: 0.3; the hindered phenol main antioxidant is antioxidant 1790; the phosphite ester auxiliary antioxidant is an antioxidant 626.
Preferably, the processing aid is a mixture of 1: 1 stearic acid and calcium stearate.
The invention also provides a preparation method of the creep-resistant geocell material, which comprises the following steps:
A. weighing each raw material of the creep-resistant geocell material for later use;
B. fully and uniformly mixing the raw materials except the chopped fibers by using a high-speed mixer for 4min to obtain a mixture;
C. melt extrusion: feeding the mixture into a double-screw extruder, adding the chopped fibers into the double-screw extruder from a forced feeding device at the middle section of the double-screw extruder, and carrying out melt extrusion and granulation to obtain the creep-resistant geocell material;
in the step C, the parameters of the double-screw extruder are set as follows: the temperature of the first zone is 175 ℃, the temperature of the second zone is 182 ℃, the temperature of the third zone is 187 ℃, the temperature of the fourth zone is 192 ℃, the temperature of the fifth zone is 197 ℃, the temperature of the sixth zone is 202 ℃, the temperature of the seventh zone is 202 ℃, the temperature of the eighth zone is 202 ℃, the temperature of the ninth zone is 202 ℃, the temperature of the head is 202 ℃, the rotating speed of the main machine is 280 plus 300r/min, and the feeding frequency is 13-20 HZ.
Example 3:
a creep-resistant geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 65 parts of (a) a reaction product of (B),
ethylene-vinyl acetate copolymer: 13 parts of (a) to (b),
short-cut fiber: 25 parts of (a) to (b),
ultraviolet absorber: 0.8 part by weight of a reaction kettle,
antioxidant: 0.9 part by weight of a reaction kettle,
interface compatilizer: 7 parts of (a) a mixture of (b),
processing aid: 1.2 parts;
the chopped fiber is a mixture of chopped glass fiber, chopped aramid fiber and chopped basalt fiber.
Preferably, the mass ratio of the chopped glass fibers, the chopped aramid fibers and the chopped basalt fibers in the mixture of the chopped glass fibers, the chopped aramid fibers and the chopped basalt fibers is 10: 16: 6.
preferably, the high density polyethylene is korean SK 3301.
Preferably, the ethylene-vinyl acetate copolymer is american-style selanibs (EVA) 1210.
Preferably, the interfacial compatibilizer is maleic anhydride grafted polyethylene.
Preferably, the ultraviolet absorbent is an ultraviolet absorbent 770.
Preferably, the antioxidant is a mixture of a hindered phenol main antioxidant and a phosphite ester auxiliary antioxidant, and the mass ratio of the hindered phenol main antioxidant to the phosphite ester auxiliary antioxidant is 1: 0.4; the hindered phenol main antioxidant is antioxidant 1790; the phosphite ester auxiliary antioxidant is an antioxidant 626.
Preferably, the processing aid is a mixture of 1: 1 stearic acid and calcium stearate.
The invention also provides a preparation method of the creep-resistant geocell material, which comprises the following steps:
A. weighing each raw material of the creep-resistant geocell material for later use;
B. fully and uniformly mixing the raw materials except the chopped fibers by using a high-speed mixer for 4min to obtain a mixture;
C. melt extrusion: feeding the mixture into a double-screw extruder, adding the chopped fibers into the double-screw extruder from a forced feeding device at the middle section of the double-screw extruder, and carrying out melt extrusion and granulation to obtain the creep-resistant geocell material;
in the step C, the parameters of the double-screw extruder are set as follows: the temperature of the first zone is 175 ℃, the temperature of the second zone is 182 ℃, the temperature of the third zone is 187 ℃, the temperature of the fourth zone is 192 ℃, the temperature of the fifth zone is 197 ℃, the temperature of the sixth zone is 202 ℃, the temperature of the seventh zone is 202 ℃, the temperature of the eighth zone is 202 ℃, the temperature of the ninth zone is 202 ℃, the temperature of the head is 202 ℃, the rotating speed of the main machine is 280 plus 300r/min, and the feeding frequency is 13-20 HZ.
Example 4:
a creep-resistant geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 60 parts of (a) to (b),
ethylene-vinyl acetate copolymer: 11 parts of (a) to (b),
short-cut fiber: 22 parts of (a) to (b),
ultraviolet absorber: 0.4 part by weight of a reaction kettle,
antioxidant: 0.7 part by weight of a reaction kettle,
interface compatilizer: 5 parts of (a) a mixture of (b),
processing aid: 0.9 part;
the chopped fiber is a mixture of chopped glass fiber, chopped aramid fiber and chopped basalt fiber.
Preferably, the mass ratio of the chopped glass fibers, the chopped aramid fibers and the chopped basalt fibers in the mixture of the chopped glass fibers, the chopped aramid fibers and the chopped basalt fibers is 10: 14.5: 5.
preferably, the high density polyethylene is korean SK 3301.
Preferably, the ethylene-vinyl acetate copolymer is american-style selanibs (EVA) 1210.
Preferably, the interfacial compatibilizer is maleic anhydride grafted polyethylene.
Preferably, the ultraviolet absorbent is an ultraviolet absorbent 770.
Preferably, the antioxidant is a mixture of a hindered phenol main antioxidant and a phosphite ester auxiliary antioxidant, and the mass ratio of the hindered phenol main antioxidant to the phosphite ester auxiliary antioxidant is 1: 0.34; the hindered phenol main antioxidant is antioxidant 1790; the phosphite ester auxiliary antioxidant is an antioxidant 626.
Preferably, the processing aid is a mixture of 1: 1 stearic acid and calcium stearate.
The invention also provides a preparation method of the creep-resistant geocell material, which comprises the following steps:
A. weighing each raw material of the creep-resistant geocell material for later use;
B. fully and uniformly mixing the raw materials except the chopped fibers by using a high-speed mixer for 4min to obtain a mixture;
C. melt extrusion: feeding the mixture into a double-screw extruder, adding the chopped fibers into the double-screw extruder from a forced feeding device at the middle section of the double-screw extruder, and carrying out melt extrusion and granulation to obtain the creep-resistant geocell material;
in the step C, the parameters of the double-screw extruder are set as follows: the temperature of the first zone is 175 ℃, the temperature of the second zone is 182 ℃, the temperature of the third zone is 187 ℃, the temperature of the fourth zone is 192 ℃, the temperature of the fifth zone is 197 ℃, the temperature of the sixth zone is 202 ℃, the temperature of the seventh zone is 202 ℃, the temperature of the eighth zone is 202 ℃, the temperature of the ninth zone is 202 ℃, the temperature of the head is 202 ℃, the rotating speed of the main machine is 280 plus 300r/min, and the feeding frequency is 13-20 HZ.
Comparative example 1:
the difference from example 4 is that the amount of the chopped fibers added was 10 parts, and the other points were the same as example 4.
Comparative example 2:
the difference from example 4 was that the amount of the chopped fibers added was 30 parts, and the other examples were the same as example 4.
Comparative example 3:
the difference from example 4 is that the chopped fibers are the same as example 4 except that the chopped glass fibers are not included.
Comparative example 4:
the difference from example 4 is that the chopped fibers are the same as example 4 except that the chopped aramid fibers are not included in the chopped fibers.
Comparative example 5:
the difference from example 4 is that the chopped fibers are the same as example 4 except that the chopped basalt fibers are not included.
Comparative example 6:
the difference from example 4 is that no ethylene-vinyl acetate copolymer is present, and the other is the same as example 4.
The creep-resistant geocell materials obtained in examples 2 to 4 of the present invention and comparative examples 1 to 6 were prepared into standard sample bars, and the performance test was performed, respectively, and the test results are shown in table 1:
TABLE 1
| Detecting items | Creep ratio | Notched impact strength of cantilever beam | Tensile strength | Flexural modulus |
| Unit of | min | J/m | MPa | MPa |
| Example 2 | 0.6 | 128 | 56 | 3150 |
| Example 3 | 0.5 | 130 | 60 | 3210 |
| Example 4 | 0.4 | 134 | 63 | 3215 |
| Comparative example 1 | 1.5 | 100 | 48 | 1400 |
| Comparative example 2 | 0.4 | 132 | 64 | 3500 |
| Comparative example 3 | 1.1 | 120 | 52 | 2700 |
| Comparative example 4 | 1.2 | 118 | 50 | 3340 |
| Comparative example 5 | 1.0 | 123 | 53 | 2820 |
| Comparative example 6 | 0.7 | 95 | 57 | 3235 |
As can be seen from the above table, the creep-resistant geocell material of the present invention has the following advantages: the creep ratio is low, and the creep resistance is excellent; the cantilever beam notch has high impact strength and good impact resistance; the tensile strength is high, and the mechanical property is good; the bending modulus is high; the comprehensive mechanical property is good.
In addition, the creep-resistant geocell material disclosed by the invention has the advantages that the low-temperature brittle point can reach-47 ℃, the thermal deformation temperature under load can reach 130 ℃, the oxidation induction time can reach 300min, the comprehensive use performance is good, the creep-resistant geocell material is not easy to damage, the creep-resistant geocell material is suitable for various use environments, and the service life is long.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (10)
1. The creep-resistant geocell material is characterized by being prepared from the following raw materials in parts by weight:
high density polyethylene: 55-65 parts of (by weight),
ethylene-vinyl acetate copolymer: 9-13 parts of (A) and (B),
short-cut fiber: 15-25 parts of (A) a water-soluble polymer,
ultraviolet absorber: 0.3 to 0.8 portion of,
antioxidant: 0.4 to 0.9 portion of,
interface compatilizer: 4-7 parts of (a) a solvent,
processing aid: 0.6-1.2 parts;
the chopped fiber is a mixture of chopped glass fiber, chopped aramid fiber and chopped basalt fiber.
2. The creep-resistant geocell material of claim 1, wherein the creep-resistant geocell material is made from raw materials comprising, by weight:
high density polyethylene: 60 parts of (a) to (b),
ethylene-vinyl acetate copolymer: 11 parts of (a) to (b),
short-cut fiber: 22 parts of (a) to (b),
ultraviolet absorber: 0.4 part by weight of a reaction kettle,
antioxidant: 0.7 part by weight of a reaction kettle,
interface compatilizer: 5 parts of (a) a mixture of (b),
processing aid: 0.9 part;
the chopped fiber is a mixture of chopped glass fiber, chopped aramid fiber and chopped basalt fiber.
3. The creep-resistant geocell material of claim 1, wherein the mixture of chopped glass, chopped aramid, and chopped basalt fibers has a mass ratio of chopped glass, chopped aramid, and chopped basalt fibers of 10: (13-16): (4-6).
4. The creep-resistant geocell material of claim 1, wherein the high density polyethylene is korean SK 3301.
5. The creep-resistant geocell material of claim 1, wherein the ethylene vinyl acetate copolymer is American Searnib (EVA) 1210.
6. The creep-resistant geocell material of claim 1, wherein the interphase compatibilizer is maleic anhydride grafted polyethylene.
7. The creep-resistant geocell material of claim 1, wherein the UV absorber is UV absorber 770.
8. The creep-resistant geocell material according to claim 1, wherein the antioxidant is a mixture of a hindered phenol primary antioxidant and a phosphite secondary antioxidant, and the mass ratio of the hindered phenol primary antioxidant to the phosphite secondary antioxidant is 1: (0.3 to 0.4); the hindered phenol main antioxidant is antioxidant 1790; the phosphite ester auxiliary antioxidant is an antioxidant 626.
9. The creep-resistant geocell material of claim 1, wherein the processing aid is stearic acid and at least two of zinc stearate and calcium stearate.
10. A method of making a creep-resistant geocell material according to any one of claims 1 to 9, comprising the steps of:
A. weighing each raw material of the creep-resistant geocell material for later use;
B. fully and uniformly mixing the raw materials except the chopped fibers by using a high-speed mixer for 3-5min to obtain a mixture;
C. melt extrusion: feeding the mixture into a double-screw extruder, adding the chopped fibers into the double-screw extruder from a forced feeding device at the middle section of the double-screw extruder, and carrying out melt extrusion and granulation to obtain the creep-resistant geocell material;
in the step C, the parameters of the double-screw extruder are set as follows: the temperature of the first zone is 170-180 ℃, the temperature of the second zone is 180-185 ℃, the temperature of the third zone is 185-190 ℃, the temperature of the fourth zone is 190-200 ℃, the temperature of the fifth zone is 195-210 ℃, the temperature of the sixth zone is 200-210 ℃, the temperature of the seventh zone is 200-210 ℃, the temperature of the eighth zone is 200-210 ℃, the temperature of the ninth zone is 200-210 ℃, the temperature of the head is 200-210 ℃, the rotating speed of the host machine is 280-300r/min, and the feeding frequency is 13-20 HZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010099726.0A CN111253660A (en) | 2020-02-18 | 2020-02-18 | Creep-resistant geocell material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010099726.0A CN111253660A (en) | 2020-02-18 | 2020-02-18 | Creep-resistant geocell material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111253660A true CN111253660A (en) | 2020-06-09 |
Family
ID=70941582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010099726.0A Pending CN111253660A (en) | 2020-02-18 | 2020-02-18 | Creep-resistant geocell material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111253660A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106117706A (en) * | 2016-06-24 | 2016-11-16 | 安徽徽风新型合成材料有限公司 | A kind of environment-friendly type HDPE composite for geotechnical grid |
| CN107973952A (en) * | 2016-10-21 | 2018-05-01 | 中国石油化工股份有限公司 | A kind of modified poly ethylene TGXG and preparation method for strengthening creep-resistant property |
| CN109942956A (en) * | 2019-04-02 | 2019-06-28 | 山东路德新材料股份有限公司 | A kind of TGXG composite material and preparation method |
-
2020
- 2020-02-18 CN CN202010099726.0A patent/CN111253660A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106117706A (en) * | 2016-06-24 | 2016-11-16 | 安徽徽风新型合成材料有限公司 | A kind of environment-friendly type HDPE composite for geotechnical grid |
| CN107973952A (en) * | 2016-10-21 | 2018-05-01 | 中国石油化工股份有限公司 | A kind of modified poly ethylene TGXG and preparation method for strengthening creep-resistant property |
| CN109942956A (en) * | 2019-04-02 | 2019-06-28 | 山东路德新材料股份有限公司 | A kind of TGXG composite material and preparation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102391628B (en) | Polylactic acid/ polyamide 11 alloy material | |
| KR101628386B1 (en) | Eco Friendly Polypropylene-Polylactic acid Composites for Automotive Interiors | |
| CN105860468A (en) | Biodegradable supertough polylactic acid (PLA) blend material and preparation method thereof | |
| CN105504498B (en) | A kind of injection grade polypropylene microporous foam composite material and preparation method thereof | |
| CN103012968A (en) | Weather-resistant glass fiber reinforced polypropylene composite and preparation method thereof | |
| CN102898798A (en) | Transparent polylactic acid alloy material | |
| CN112574515B (en) | Polypropylene foam material and preparation method thereof | |
| CN109337312A (en) | A kind of lactic acid composite material and preparation method thereof | |
| CN105601774A (en) | Emulsion adhesion agent for glass fiber chopped strand mat and preparation method thereof | |
| CN1995124A (en) | High tenacious polypropylene material for manufacturing central conditioner air-discharge hose and its preparation method | |
| CN102690444A (en) | Starch-base biodegradable resin composition and preparation method thereof | |
| CN105859220A (en) | C30-C50-grade polyvinyl alcohol fiber reinforced cement-based composites | |
| KR101293916B1 (en) | Polylactic acid composition for automobile parts | |
| CN101759896A (en) | Polyethylene modified material for degradable garbage bags and preparation method thereof | |
| CN111303515A (en) | Geocell material with low linear thermal expansion coefficient and preparation method thereof | |
| CN111171431A (en) | Anti-aging geocell material and preparation method thereof | |
| CN111253660A (en) | Creep-resistant geocell material and preparation method thereof | |
| CN105420845A (en) | Modified polyoxymethylene fiber for concrete and preparation method thereof | |
| CN111286104A (en) | High-temperature-resistant geocell material and preparation method thereof | |
| EP2688957B1 (en) | Biobased polymer compositions | |
| CN110964298A (en) | Biodegradable modified material and preparation method thereof | |
| CN104045897A (en) | Reinforced and modified polyethylene composition and preparation method thereof | |
| CN111995856A (en) | PC composition | |
| CN111378217A (en) | Anti-tensile geocell material and preparation method thereof | |
| CN104619753A (en) | Polyolefin granulation method, polyolefin resin, polyolefin fibre, use of polyolefin fibre and cement composites |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |