CN115612204B - Masterbatch for improving strength retention rate of polypropylene weld marks, and preparation method and application thereof - Google Patents
Masterbatch for improving strength retention rate of polypropylene weld marks, and preparation method and application thereof Download PDFInfo
- Publication number
- CN115612204B CN115612204B CN202211183909.6A CN202211183909A CN115612204B CN 115612204 B CN115612204 B CN 115612204B CN 202211183909 A CN202211183909 A CN 202211183909A CN 115612204 B CN115612204 B CN 115612204B
- Authority
- CN
- China
- Prior art keywords
- polypropylene
- strength retention
- parts
- antioxidant
- glass fiber
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
-
- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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 master batch for improving the strength retention rate of polypropylene weld marks, and a preparation method and application thereof, wherein the master batch comprises the following components in parts by weight: 5 to 40 parts of random polypropylene resin, 5 to 40 parts of glass fiber, 2 to 10 parts of compatilizer, 0.1 to 2 parts of antioxidant and 0.1 to 2 parts of sulfonated epoxy resin; the glass fiber is glass fiber treated by a silane coupling agent, and the tensile modulus of the glass fiber treated by the silane coupling agent is 90-110 GPa. The master batch can effectively reduce the crystallization temperature of the polypropylene material, prolong the melting contact time of a weld mark, increase the bonding degree of an interface and improve the weld mark strength retention rate, and the polypropylene material prepared by adopting the master batch has high weld mark strength retention rate for the polypropylene materials with different glass fibers, wherein the weld mark strength retention rate is not lower than 85%.
Description
Technical Field
The invention relates to the field of modified plastics, in particular to a master batch for improving the strength retention rate of polypropylene weld marks, and a preparation method and application thereof.
Background
Along with the increasing requirement of environmental protection, the light weight and low carbonization of the automobile industry become one of the development trends, and are reflected on the automobile materials, and are mainly expressed in terms of plastic substitution steel, engineering plastic olefination and the like. In the aspect of olefine material, the reinforced polypropylene, especially the short glass fiber reinforced polypropylene, has the advantages of high strength, high modulus, low price, simple forming mode and the like, and becomes one of the most main materials to be selected in the olefine material. However, the weld mark strength retention rate of the reinforced polypropylene in the prior art is generally less than 50%, even as low as 20-30%, which is far lower than 90% or more of that of the pure polypropylene, so that the weld mark position of the short glass fiber reinforced polypropylene injection molded part becomes a weak point of the part.
The following method is adopted in the prior art to improve weld mark retention, but the effect is not obvious. CN110698756a increases the weld mark strength retention of the polypropylene composite material by adding the sulfonated polyolefin wax, and from the results, the weld mark strength retention of the polypropylene composite material is increased from about 20% to about 40%; CN110818999a increases the weld strength retention of the polypropylene composition by adding PA6, but the weld strength retention is about 50% or less. In addition, it has been found that the glass fiber content has a great influence on the weld mark strength retention of the reinforced polypropylene material. Therefore, there is a need in the art for a better method to provide reinforced polypropylene materials with high weld strength retention at varying glass fiber levels.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a master batch for improving the strength retention rate of polypropylene weld marks. After the master batch is mixed with polypropylene, the weld mark strength retention rate of the polypropylene material can be obviously improved, and the polypropylene material is suitable for polypropylene materials with different glass fiber contents.
It is still another object of the present invention to provide a process for preparing a masterbatch for improving weld line strength retention of polypropylene.
It is a further object of the present invention to provide the use of a masterbatch for improving the weld strength retention of polypropylene in improving the weld strength retention of plastic compositions.
It is another object of the present invention to provide a reinforced polypropylene material with high weld strength retention.
Another object of the present invention is to provide a method for preparing a reinforced polypropylene material with high weld mark strength retention.
The above object of the present invention is achieved by the following technical scheme:
the master batch for improving the weld mark strength retention rate of polypropylene comprises the following components in parts by weight:
the glass fiber is glass fiber treated by a silane coupling agent, and the tensile modulus of the glass fiber treated by the silane coupling agent is 90-110 GPa.
The invention provides a master batch for improving the weld mark strength retention rate of polypropylene, which comprises glass fibers and sulfonated epoxy resin, wherein the master batch and polypropylene are melted, and the weld mark strength of a polypropylene composition can be improved, wherein the polar groups of the sulfonated epoxy resin are matched with the glass fibers, so that the bonding degree of the glass fibers and random polypropylene resin can be increased; meanwhile, the sulfonated epoxy resin also avoids the loss of weld mark strength caused by the lubrication action of the sulfonated polyolefin wax; the random polypropylene resin in the master batch is not crystallized, and the glass fiber can be dispersed to the surface of the weld mark, so that the interfacial riveting degree of the polypropylene resin at the joint of the weld mark is increased, thereby improving the weld mark strength retention rate of the polypropylene composition. The polypropylene material prepared by the master batch has high weld mark strength retention rate under different glass fiber contents, and the prepared polypropylene material can be better applied to plastic substituted steel or olefination parts of the automobile industry and household appliances.
Preferably, the sulfonated epoxy resin is 0.5 to 1.5 parts.
Preferably, the epoxy equivalent of the sulfonated epoxy resin is 150 to 500g/eq.
More preferably, the sulfonated epoxy resin has an epoxy equivalent weight of 450 to 500g/eq.
Preferably, the sulfonated epoxy resin has a sulfonation degree of no more than 520%.
More preferably, the sulfonated epoxy resin has a sulfonation degree of 400 to 500%.
The compatibility of the sulfonated epoxy resin with the glass fiber and the random polypropylene resin can be further improved by adjusting the epoxy equivalent and the sulfonation degree.
Specifically, the preparation process of the sulfonated epoxy resin comprises the following steps: dissolving epoxy resin by adopting dichloroethane, then slowly adding chlorosulfonic acid to uniformly mix, raising the temperature to 50-70 ℃ to react, treating the reaction product by adopting sodium hydroxide and ethanol in sequence, and drying and dehydrating to obtain sulfonated epoxy resin;
method for measuring sulfonation degree: the sulfonation degree is adopted 1 Performing a test by an H-NMR method;
the method for measuring the epoxy equivalent: reference is made to GB/T4612-2008 determination of epoxy equivalent of plastic epoxy compounds.
Preferably, the compatibilizer is a maleic anhydride grafted polyolefin elastomer.
More preferably, the compatibilizer is a maleic anhydride grafted POE elastomer.
In the present invention, the antioxidant may be a commonly used antioxidant such as a hindered phenol type antioxidant, a thio ether type antioxidant, a phosphite ester type antioxidant, etc.; more preferably, a combination of antioxidants is used; for example, it is a combination of both a hindered phenol type antioxidant and a phosphite type antioxidant or a combination of a hindered phenol type antioxidant, a thioether type antioxidant and a phosphite type antioxidant. Preferably, the antioxidant is hindered phenol type antioxidant, thio ether type antioxidant and phosphite ester type antioxidant, and the mass ratio is (1-4): 1:1. The inventors have found that with this combination, the tensile strength loss rate of the polypropylene composite after the second pass is minimal relative to the material after the first pass.
The invention provides a preparation method of the master batch for improving the weld mark strength retention rate of polypropylene, which comprises the following steps:
mixing random polypropylene resin, compatilizer, antioxidant and sulfonated epoxy resin, feeding through a main feeding port, feeding glass fiber through a side feeding port, and extruding through a double screw extruder at the extrusion temperature of 170-230 ℃.
A high weld mark strength retention reinforced polypropylene material is prepared from the master batch for improving the weld mark strength retention of polypropylene.
Preferably, the high weld mark strength retention reinforced polypropylene material comprises the following components in parts by weight:
12-88 parts of master batch for improving the strength retention rate of polypropylene weld marks;
12-88 parts of polypropylene resin;
0.1-1 part of antioxidant;
the polypropylene resin is homo-polypropylene resin and/or copolymerization polypropylene resin.
Further, the high weld mark strength retention reinforced polypropylene material preferably comprises the following components in parts by weight:
44-68 parts of master batch for improving the strength retention rate of polypropylene weld marks;
32-56 parts of polypropylene resin;
0.1 to 1 part of antioxidant.
Preferably, the atactic polypropylene resin has a melt flow rate of 0.1 to 1g/10min at 230℃under 2.16 kg.
Preferably, the melt flow rate of the random polypropylene resin is measured as GB/T3682-2018.
Preferably, the melt flow rate of the polypropylene resin is 0.2-35 g/10min at 230 ℃ under 2.16 kg.
Preferably, the melt flow rate of the polypropylene resin is measured in GB/T3682-2018.
The invention protects the high weld mark strength retention reinforced polypropylene material, which comprises the following steps:
polypropylene resin and an antioxidant are mixed in proportion, fed through a main feeding port, master batches for improving the strength retention rate of weld marks of polypropylene are fed through a side feeding port, and extruded through a double screw extruder, wherein the extrusion temperature is 180-230 ℃.
The master batch for improving the strength retention rate of the polypropylene weld mark is compounded with the polypropylene resin, and the components are cooperated, so that the crystallization temperature of the polypropylene material can be effectively reduced, the melting contact time of the weld mark is prolonged, the bonding degree of an interface is increased, and the strength retention rate of the weld mark is improved.
The invention protects the application of the high weld mark strength retention rate reinforced polypropylene material in the preparation of plastic substituted steel or olefination parts in the fields of automobile industry and household appliances.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a master batch for improving the weld mark strength retention rate of polypropylene, which takes sulfonated epoxy resin as a modifier and glass fiber with specific tensile modulus as a reinforcing agent, so that the master batch can be added into polypropylene resin, effectively reduce the crystallization temperature of the polypropylene material, prolong the melt contact time at the weld mark, increase the bonding degree of an interface and improve the weld mark strength retention rate.
Detailed Description
The invention will be further described with reference to the following specific embodiments, but the examples are not intended to limit the invention in any way. Raw materials reagents used in the examples of the present invention are conventionally purchased raw materials reagents unless otherwise specified.
The raw materials used in each of the examples and comparative examples:
polypropylene resin: the melt flow rate of the homopolymerized polypropylene resin T30S under the condition of 2.16kg at 230 ℃ is 2.6g/10min, which is a company of petrochemical industry in China;
random polypropylene resin: PP 4220, melt flow rate at 230℃and 2.16kg was 0.4g/10min, china petrochemical company, yanshan petrochemical Co.
Glass fiber 1: e9 glass fiber, the tensile modulus is 101GPa, china boulder Co., ltd, the E9 glass fiber is subjected to surface treatment by adopting a silane coupling agent KH-560;
the specific modification method comprises the following steps: chopping glass fiber to 6-12mm, spraying silane coupling agent KH-560 onto the surface of glass fiber, and mixing uniformly to obtain modified glass fiber;
glass fiber 2: e8 glass fiber, the tensile modulus is 90GPa, china boulder Co., ltd, the E8 glass fiber is subjected to surface treatment by adopting a silane coupling agent KH-560;
glass fiber 3: e glass fiber 508C (surface treated with silane coupling agent), tensile modulus 74GPa, china boulder Co., ltd;
and (3) a compatilizer: maleic anhydride grafted POE elastomer, KT-905, shenyang Kong Tong Plastic Co., ltd;
sulfonated epoxy resin 1: CYD-011 with the epoxy equivalent of 450-500g/eq, petrochemical industry, and sulfonation reaction to 500 percent;
sulfonated epoxy resin 2: CYD-128, epoxy equivalent is 180-200g/eq, chinese petrochemical industry, and sulfonation reaction is carried out until the sulfonation degree is 500%;
sulfonated epoxy resin 3: E-39D, wherein the epoxy equivalent is 238-270g/eq, and the degree of sulfonation is 500% through sulfonation reaction;
sulfonated epoxy resin 4: CYD-011 with the epoxy equivalent of 450-500g/eq, petrochemical industry, and sulfonation reaction to reach the sulfonation degree of 520%;
sulfonated epoxy resin 5: CYD-011 with the epoxy equivalent of 450-500g/eq, petrochemical industry, and sulfonation reaction to the sulfonation degree of 450%;
sulfonated epoxy resin 6: CYD-011, wherein the epoxy equivalent is 450-500g/eq, petrochemical industry, and sulfonation reaction is carried out until the sulfonation degree is 400%;
sulfonated epoxy resin 7: CYD-011 with epoxy equivalent of 450-500g/eq, petrochemical industry, sulfonation reaction to sulfonation degree of 380%;
sulfonated epoxy resin 8: CYD-011 with epoxy equivalent of 450-500g/eq, petrochemical industry, and sulfonation reaction to 550% sulfonation degree;
sulfonated polyolefin wax: polyethylene wax AC-617A, honiswell, is sulfonated to 500% sulfonation degree;
octyl phenol polyoxyethylene ether: OP-10, nantong run Feng.
In the embodiment, the sulfonated epoxy resin is obtained by self-making, the epoxy resin is dissolved by adopting dichloroethane, then chlorosulfonic acid is slowly added for uniform mixing, the temperature is increased to 50-70 ℃ for reaction, the reaction product is treated by adopting sodium hydroxide and ethanol in sequence, and the sulfonated epoxy resin is obtained by drying and dehydrating. The degree of sulfonation is controlled by the amount of chlorosulfonic acid added.
Antioxidant 1: the composition of the hindered phenol antioxidant, the thioether antioxidant and the aryl phosphite antioxidant is 2:1:1; wherein the hindered phenol type antioxidant is antioxidant 3114, the thioether type antioxidant is antioxidant 412S, and the phosphite type antioxidant is antioxidant PEP-36, which are all sold in the market.
Antioxidant 2: the composition of the hindered phenol antioxidant and the phosphite antioxidant is 2:1; wherein the hindered phenol antioxidant is conventional antioxidant 1010, and the phosphite antioxidant is conventional antioxidant 168, which are all commercially available.
Examples 1 to 20 and comparative examples 1 to 6
A masterbatch for improving the weld mark strength retention of polypropylene, comprising the components in parts by weight as shown in tables 1 to 6 below.
Table 1 formulations of the masterbatch for improving weld line strength retention of polypropylene of examples 1 to 7
Table 2 formulation of the masterbatch for improving weld line strength retention of polypropylene of examples 8 to 20
Table 3 formulation of masterbatch for improving weld line strength retention of polypropylene of comparative examples 1 to 6
The preparation method of the master batch for improving the strength retention rate of the polypropylene weld mark comprises the following steps:
for examples 1-20 and comparative examples 1-6, random polypropylene resin (polypropylene resin in comparative example 4), compatilizer, antioxidant and sulfonated epoxy resin are added into a high-speed mixer in proportion to be mixed uniformly, then the mixed raw materials are added into a main feeding port of a double-screw extruder to be fed, glass fibers are fed from a side feeding port, and master batches for improving the weld mark strength retention rate of polypropylene are obtained through extrusion and granulation of the double-screw extruder, wherein the extrusion temperature is 170-230 ℃.
Application of
The master batch for improving the weld mark strength retention of the polypropylene prepared by the method is used for further preparing a high weld mark strength retention reinforced polypropylene material, and the high weld mark strength retention reinforced polypropylene material comprises the following components in parts by weight as shown in tables 4-6:
table 4 formulations of sample examples 1 to 9 of high weld mark strength retention reinforced polypropylene materials
Table 5 formulations of sample examples 10 to 23 of high weld mark strength retention reinforced polypropylene materials
Table 6 formulations of polypropylene material sample comparative examples 1 to 7
The preparation method of the reinforced polypropylene material with high weld mark strength retention rate comprises the following steps:
for sample 1-sample 23 and sample comparative example 2-sample comparative example 7, adding polypropylene resin and antioxidant into a high-speed mixer in proportion, mixing uniformly, then adding into a main feeding port of a double-screw extruder, adding master batch for improving the weld mark strength retention rate of polypropylene from a side feeding port, carrying out melt blending, extrusion and granulation to obtain the high weld mark strength retention rate reinforced polypropylene material, wherein the extrusion temperature is 180-230 ℃.
For sample comparative example 1, random polypropylene resin, compatilizer, partial antioxidant and sulfonated epoxy resin are added into a high-speed mixer in proportion to be mixed uniformly, then added into a main feeding port of a double-screw extruder, glass fiber is added from a side feeding port, and melt blending, extrusion and granulation are carried out to obtain the reinforced polypropylene material with high weld mark strength retention rate, wherein the extrusion temperature is 180-230 ℃.
Performance testing
1. Test method
Sample examples 1 to 23 and sample comparative examples 1 to 7 prepared above were injection molded into tensile bars and weld line tensile bars, which were tested by adjusting for 24 hours at 2322 ℃ under 50210% rh, and were tested by test standard reference GB/T1040 at a tensile rate of 10mm/min, wherein weld line strength retention = weld line strength/tensile strength x 100%.
2. Test results
The tensile strength and weld strength retention test results of the high weld strength retention polypropylene materials prepared above are shown in table 7.
TABLE 7 tensile Strength and weld Strength retention of high weld Strength retention Polypropylene materials
From the test results in table 7, it can be derived that:
as can be seen from comparison of sample examples 1 to 23 and sample comparative examples 1 to 7, the high weld strength retention polypropylene materials prepared using the master batches prepared in the examples all have weld strength retention of not less than 85.0%, whereas the sample comparative examples 1 to 7 have weld strength retention of only 83.0% at the highest, and thus, the sample examples of the present invention have significantly better weld strength retention than the sample comparative examples.
As can be seen from the comparison of sample examples 1 to 3, the weld line strength retention rate of the polypropylene material obtained by further adjusting the epoxy equivalent of the sulfonated epoxy resin to 450 to 500g/eq was higher.
As can be seen from comparison of sample examples 1, 4 to 5 and 15 to 17, the weld strength retention of the polypropylene material obtained by further adjusting the sulfonation degree of the sulfonated epoxy resin to 400 to 500% was higher.
As can be seen by comparing the sample example 1 with the sample example 10, when the antioxidant is selected from the group consisting of hindered phenol type antioxidants, thio-ether type antioxidants and phosphite ester type antioxidants, the mass ratio is (1-4): and when the mixture is 1:1, the prepared polypropylene material has higher weld mark strength retention rate.
As can be seen from a comparison of sample 1 and samples 11 to 14, the weld strength retention was maintained at 85% or more depending on the glass fiber content in the masterbatch.
As can be seen from a comparison of sample 1 and samples 20 to 23, the weld strength retention was maintained at 85% or more depending on the amount of glass fiber added.
The tensile strength of the polypropylene material prepared by increasing the amount of glass fiber in the master batch is gradually increased, and the weld mark strength retention rate is gradually reduced.
As can be seen from comparison of sample 1 with sample comparative examples 1 to 7, in sample comparative example 1, instead of preparing the random polypropylene resin, glass fiber, compatibilizer, antioxidant and sulfonated epoxy resin into master batch, the master batch was directly added to the polypropylene resin system, and the glass fiber and the sulfonated epoxy resin could not exert a synergistic effect, so that the weld mark strength retention rate of the prepared polypropylene material could only reach 75.1%. In sample comparative example 2, octylphenol polyoxyethylene ether was used instead of sulfonated epoxy resin in the preparation of the master batch for improving the weld mark strength retention rate of polypropylene, and the polyoxyethylene octylphenol ether was easily accumulated on the weld mark interface due to lubrication to have a weakening effect on the weld mark strength, resulting in a decrease in the weld mark strength retention rate. In sample comparative example 3, sulfonated polyolefin wax was used instead of sulfonated epoxy resin in the preparation of master batch for improving the weld mark strength retention rate of polypropylene, and the polyolefin wax easily accumulated on the weld mark interface due to the lubrication action has a weakening effect on the weld mark strength, resulting in a decrease in the weld mark strength retention rate; in the sample comparative example 4, glass fibers with lower tensile modulus are adopted in the preparation process of master batch for improving the weld mark strength retention rate of polypropylene, and when the tensile modulus of the glass fibers is lower, the glass fibers cannot be matched with sulfonated epoxy resin, so that the weld mark strength retention rate of the polypropylene material cannot be improved; in sample comparative example 5, polypropylene resin is used to replace random polypropylene resin in the preparation process of master batch for improving the weld mark strength retention rate of polypropylene, in the subsequent preparation of polypropylene material, the crystallization temperature of the polypropylene resin is higher, the polypropylene resin is rapidly cooled, the melt contact time at the weld mark is shortened, obvious layering is formed, and therefore the weld mark strength retention rate of the prepared polypropylene material is lower. In the sample comparative example 6, the master batch for improving the weld mark strength retention rate of the polypropylene does not contain sulfonated epoxy resin, can not be matched with glass fibers, and the bonding degree of the glass fibers and the random polypropylene resin is not increased, so that the weld mark strength retention rate of the prepared polypropylene material is lower; in sample comparative example 7, the addition of an excessive amount of sulfonated epoxy resin in the preparation of the master batch for improving the weld strength retention of polypropylene resulted in too strong polarity, while better coupling with glass fibers, poor compatibility with nonpolar polypropylene resulted in lower weld strength retention of the polypropylene material prepared therefrom.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. A masterbatch for improving the weld mark strength retention of polypropylene, comprising the following components in parts by weight:
5-40 parts of random polypropylene resin;
5-40 parts of glass fiber;
2-10 parts of compatilizer;
0.1-2 parts of antioxidant;
0.1-2 parts of sulfonated epoxy resin;
the glass fiber is glass fiber treated by a silane coupling agent, and the tensile modulus of the glass fiber treated by the silane coupling agent is 90-110 Gpa; the compatilizer is a maleic anhydride grafted POE elastomer.
2. The masterbatch for improving weld mark strength retention of polypropylene according to claim 1, wherein the sulfonated epoxy resin has an epoxy equivalent weight of 150 to 500g/eq.
3. The masterbatch for improving weld mark strength retention of polypropylene according to claim 1, wherein the sulfonated epoxy resin has a degree of sulfonation of not more than 520%.
4. The master batch for improving the weld mark strength retention rate of polypropylene according to claim 1, wherein the antioxidant is a hindered phenol type antioxidant, a thio ether type antioxidant and a phosphite ester type antioxidant in a mass ratio of (1-4): 1:1.
5. A process for producing a masterbatch for improving the weld line strength retention of polypropylene according to any one of claims 1 to 4, characterized by comprising the steps of:
mixing random polypropylene resin, compatilizer, antioxidant and sulfonated epoxy resin, feeding through a main feeding port, feeding glass fiber through a side feeding port, and extruding through a double screw extruder at the extrusion temperature of 170-230 ℃.
6. The polypropylene material is characterized by comprising the following components in parts by weight:
12-88 parts of the master batch according to any one of claims 1-4;
12-88 parts of polypropylene resin;
0.1-1 part of antioxidant;
the polypropylene resin is homo-polypropylene resin and/or copolymerization polypropylene resin.
7. A method of preparing the polypropylene material of claim 6, comprising the steps of:
polypropylene resin and antioxidant are mixed in proportion, fed through a main feeding port, master batch is fed through a side feeding port, and extruded through a double screw extruder, wherein the extrusion temperature is 180-230 ℃.
8. Use of the polypropylene material according to claim 6 for the preparation of plastic-substituted steel or olefination parts in the fields of automobile industry and household appliances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211183909.6A CN115612204B (en) | 2022-09-27 | 2022-09-27 | Masterbatch for improving strength retention rate of polypropylene weld marks, and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211183909.6A CN115612204B (en) | 2022-09-27 | 2022-09-27 | Masterbatch for improving strength retention rate of polypropylene weld marks, and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115612204A CN115612204A (en) | 2023-01-17 |
| CN115612204B true CN115612204B (en) | 2023-09-26 |
Family
ID=84860541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211183909.6A Active CN115612204B (en) | 2022-09-27 | 2022-09-27 | Masterbatch for improving strength retention rate of polypropylene weld marks, and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115612204B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000289023A (en) * | 1999-04-07 | 2000-10-17 | Idemitsu Petrochem Co Ltd | Inorganic fiber-containing thermoplastic resin pellet, molding method using the pellet and molded product |
| KR20150067471A (en) * | 2013-12-10 | 2015-06-18 | 주식회사 엘지화학 | Glass fiber reinforced light weight polypropylene resin composition, and molded product |
| CN112538260A (en) * | 2020-10-28 | 2021-03-23 | 广东轻工职业技术学院 | Glass fiber reinforced polypropylene/polyamide composite material and preparation method thereof |
| CN113388194A (en) * | 2021-05-18 | 2021-09-14 | 金发科技股份有限公司 | Glass fiber reinforced polypropylene composition and preparation method and application thereof |
| CN114316445A (en) * | 2021-12-28 | 2022-04-12 | 上海普利特复合材料股份有限公司 | High weld mark strength long glass fiber reinforced polypropylene composite material and preparation method thereof |
-
2022
- 2022-09-27 CN CN202211183909.6A patent/CN115612204B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000289023A (en) * | 1999-04-07 | 2000-10-17 | Idemitsu Petrochem Co Ltd | Inorganic fiber-containing thermoplastic resin pellet, molding method using the pellet and molded product |
| KR20150067471A (en) * | 2013-12-10 | 2015-06-18 | 주식회사 엘지화학 | Glass fiber reinforced light weight polypropylene resin composition, and molded product |
| CN112538260A (en) * | 2020-10-28 | 2021-03-23 | 广东轻工职业技术学院 | Glass fiber reinforced polypropylene/polyamide composite material and preparation method thereof |
| CN113388194A (en) * | 2021-05-18 | 2021-09-14 | 金发科技股份有限公司 | Glass fiber reinforced polypropylene composition and preparation method and application thereof |
| CN114316445A (en) * | 2021-12-28 | 2022-04-12 | 上海普利特复合材料股份有限公司 | High weld mark strength long glass fiber reinforced polypropylene composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 玻纤增强聚丙烯复合材料熔接痕性能的研究;袁海兵;广东化工;第46卷(第13期);20，23-25 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115612204A (en) | 2023-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100216490B1 (en) | Process for producing compositely reinforced polypropylene resin composition | |
| CN107057339A (en) | A kind of activeness and quietness nylon material and its preparation method and application | |
| CN103030885B (en) | Long glass-fiber reinforced polypropylene material with low emission and high performance and production method thereof | |
| CN113388194B (en) | Glass fiber reinforced polypropylene composition and preparation method and application thereof | |
| CN104629184A (en) | Composite material containing polybutylene alloy and preparation method thereof | |
| CN111073273A (en) | Glass fiber reinforced PA6 composite material for improving floating fiber and high surface smoothness and preparation method thereof | |
| CN107541049B (en) | Graphene-continuous glass fiber reinforced halogen-free flame-retardant weather-resistant PPO/HIPS alloy material and preparation method thereof | |
| CN111087740A (en) | Mineral fiber reinforced low-density high-rigidity polypropylene composite material and preparation method thereof | |
| JP3798029B2 (en) | Improved method for preparing blends of polyamide and ionic copolymer | |
| CN113912947B (en) | Polypropylene composite material and preparation method and application thereof | |
| CN115612204B (en) | Masterbatch for improving strength retention rate of polypropylene weld marks, and preparation method and application thereof | |
| CN107501719A (en) | One kind polymer-filled master batch and preparation method thereof made of polypropylene reclaimed material | |
| CN107501717B (en) | Polypropylene filling master batch and preparation method thereof | |
| CN112662053A (en) | Low-density high-performance modified polypropylene composite material for vehicle bumper and preparation method thereof | |
| CN112063056A (en) | Glass fiber reinforced polypropylene composite material with good appearance and preparation method thereof | |
| EP3502187A1 (en) | Toughened polyamide moulding masses | |
| CN108047572B (en) | Functional talcum powder master batch | |
| CN112778755B (en) | High-filling heat-conducting PA/PP composite material and application thereof | |
| CN115322481A (en) | Polypropylene high-performance compound additive and preparation method thereof | |
| CN112029260B (en) | Fibrilia-reinforced PC/ABS composite material, and preparation method and application thereof | |
| CN115785493A (en) | Long fiber reinforced halogen-free flame-retardant bio-based polyamide composite material and preparation method thereof | |
| CN113337110A (en) | High-fluidity high-insulation reinforced polyamide composite material and preparation method thereof | |
| CN108070148A (en) | A kind of polypropylene filler parent granule and preparation method thereof | |
| CN114350071A (en) | High-uniformity polypropylene modified master batch and preparation method thereof | |
| CN107501716B (en) | Polypropylene filling master batch prepared from polypropylene reclaimed material and preparation method thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |