CN104530739B - A kind of polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness - Google Patents
A kind of polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness Download PDFInfo
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Abstract
A kind of polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness, the present invention relates to wood plastic composite and preparation method thereof.The invention solves the problems that existing wood plastic composite mechanics cannot carry out the problem that activeness and quietness is modified simultaneously.The wood plastic composite of the present invention is prepared from by polyolefin, string powder, compatilizer, lubricant and thermotropic liquid crystal；Preparation method: polyolefin, compatilizer and thermotropic liquid crystal are mixed, and carry out granulation with extruder, obtain liquid crystal and strengthen composite polyolefine material, string powder, lubricant and liquid crystal are strengthened composite polyolefine material uniform in high-speed mixer and mixing, and carry out granulation with extruder, obtain wood and mould pellet, finally wood is moulded pellet and is shaped processing, i.e. obtain the polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness.Present invention is mainly used for the polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness and preparation thereof.
Description
Technical field
The present invention relates to wood plastic composite and preparation method thereof.
Background technology
Wood plastic composite (WPC) is to add in thermoplastic using string etc. as filler or reinforcing material,
And make string carry out a kind of Novel environment-friendlymaterial material that is compound and that obtain with the thermoplastic of molten condition by heating.Tool
There is following characteristics: (1) raw material sources are wide, low price；(2) good stability of the dimension, moisture absorption and water absorbing properties are relatively low；(3)
Heat resistance is preferable；(4) good corrosion resistance；(5) repeatable processing and recycling.As a kind of new material, application
Field includes building, logistics, decoration, furniture, gardens etc.；As structure class material, it is mainly used in indoor floor, furniture
And door and window；As decorative kind material, it is mainly used in automotive trim and interior decoration accessory；In addition it is also possible to for environment
There is the occasion of particular/special requirement.The development of wood plastic composite, not only contributes to protect forest resources, it is also possible to solve in city
The plastics de-referencing problem being on the rise, is conducive to society and economic sustainable development.
Wood-plastic products is composited by hydrophilic plant fiber and hydrophobic plastic, in use has that mechanical strength is low and toughness
Low problem.Mould the requirement of mechanical property in Material Field uses for satisfied wood, mechanical property can be carried out modified: (1)
Add fiber, rigid particles strengthens, but the dispersion in the composite of fiber and rigid particles and weak interface layer are to limit
The subject matter of its application, the most relatively costly；(2) selecting the higher resin matrix of intensity, mechanical strength of resin height can be along with
Fusing point and viscosity are higher, cause processing difficulties；(3) wood plastic composite is carried out foaming modification, the tough of material can be improved
Property, but the decline of rigidity and intensity can be caused；(4) add coupling agent, improved by covalent bond or intermolecular force and plant
Interface compatibility between fibres and plastics, thus reach to improve the purpose of material mechanical performance.But current wood and plastic composite
There is the problem that application is single in material mechanics modification, either strengthens modification or toughening modifying all can be along with another individual character
Loss of energy.Therefore, how to accomplish wood is moulded the modified purpose carrying out activeness and quietness, be that industry problem demanding prompt solution moulded by wood.
Summary of the invention
The invention solves the problems that existing wood plastic composite mechanics cannot carry out the problem that activeness and quietness is modified simultaneously, and provide one
Plant polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness and preparation method thereof.
A kind of polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness of the present invention press mass fraction by
20 parts～100 parts of polyolefin, 30 parts～200 parts of string powders, 2 parts～8 parts of compatilizers, 1 part～5 parts of lubricants and
0.1 part～5 parts of thermotropic liquid crystals are prepared from.
The preparation method of a kind of polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness of the present invention is
Sequentially include the following steps:
One, weigh: by mass fraction weigh 20 parts～100 parts of polyolefin, 30 parts～200 parts of string powders, 2 parts
～8 parts of compatilizers, 1 part～5 parts of lubricants and 0.1 part～5 parts of thermotropic liquid crystals；
Two, 20 parts step one weighed～100 parts of polyolefin, 2 parts～8 parts of compatilizers and 0.1 part～5 parts of thermotropic liquid
Crystalline substance mixes, and obtains mixture A, and mixture A extruder is carried out granulation, and prilling temperature is 170 DEG C～250 DEG C,
Obtain liquid crystal and strengthen composite polyolefine material；
Three, 30 parts step one weighed～200 parts of string powders, 1 part～5 parts of lubricants and liquid crystal strengthen polyene
Hydrocarbon composite is uniform in high-speed mixer and mixing, obtains mixture B, then by extruder, mixture B is carried out granulation,
Prilling temperature is 145 DEG C～220 DEG C, obtains wood and moulds pellet；
Four, wood is moulded pellet and is shaped processing, i.e. obtain thermotropic high molecule liquid crystal activeness and quietness polyolefin sill and mould
Composite.
The invention has the beneficial effects as follows: the polyolefin-based wood plastics composite of thermotropic high molecule liquid crystal activeness and quietness prepared by the present invention
Material outstanding feature is, by thermotropic liquid crystal higher for fusing point and TPO in the presence of compatilizer, in coupling
At a temperature of by melt blending, under the effect of temperature and shearing force, form fento orientation texture, exist with disperse phase
In polyolefin resin matrix, solve other and strengthen mutually as fiber, nano particle disperse uneven problem in matrix moulded by wood；
Under stress effect, the thermotropic liquid crystal as dispersion phase can cause crazing and shear band, makes the stress of Near A Crack Tip concentrate
Being relaxed, hinder the extension of crackle, system consumes big energy, and liquid crystal fine fibrilation moulds the plant fibre strengthening phase with wood
Dimension can play the collaborative effect strengthening polyolefin resin matrix, reaches to significantly improve intensity and the effect of toughness that wood is moulded simultaneously
Really, so its intensity moulded by wood prepared by the present invention and toughness is not only far above Traditional Wood moulding material, and performance is far above not adding
Enter the thermotropic high molecule liquid crystal activeness and quietness composite polyolefine material prepared by string powder；In addition thermotropic liquid crystal exists
Wood is moulded in matrix and is uniformly dispersed, and improves wood and moulds the rheological behaviour in process, and consumption is less, and cost is relatively low, it is achieved that
Reach wood is moulded the purpose of modification by modified resin base body, WPC actual production research is had great importance.
The polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness prepared by the present invention, hot strength improves
10%～40%, bending strength improves 20%～40%, and impact strength improves 30-60% so that wood plastic composite mechanics is same
Shi Jinhang activeness and quietness is modified.
The present invention is for a kind of polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness and preparation method thereof.
Detailed description of the invention
Detailed description of the invention one: a kind of thermotropic high molecule liquid crystal activeness and quietness polyolefin sill of present embodiment is moulded multiple
Condensation material, a kind of polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness presses mass fraction by 20 parts
～100 parts of polyolefin, 30 parts～200 parts of string powders, 2 parts～8 parts of compatilizers, 1 part～5 parts of lubricants and 0.1
Part～5 parts of thermotropic liquid crystals are prepared from.
Present embodiment provides the benefit that: thermotropic high molecule liquid crystal activeness and quietness prepared by present embodiment is polyolefin-based
Wood plastic composite outstanding feature is, by thermotropic liquid crystal higher for fusing point and TPO in the presence of compatilizer,
By melt blending at a temperature of coupling, under the effect of temperature and shearing force, form fento orientation texture, with dispersion phase
Form is present in polyolefin resin matrix, solves other and strengthens mutually as fiber, nano particle disperse inequality in matrix moulded by wood
Even problem；Under stress effect, the thermotropic liquid crystal as dispersion phase can cause crazing and shear band, makes Near A Crack Tip
Stress concentrate and relaxed, hinder the extension of crackle, system consumes big energy, and liquid crystal fine fibrilation moulds enhancing with wood
The string of phase can play the collaborative effect strengthening polyolefin resin matrix, reach to significantly improve simultaneously intensity that wood moulds and
The effect of toughness, so its intensity moulded by wood prepared by the present invention and toughness is not only far above Traditional Wood moulding material, and performance is remote
Higher than not adding the thermotropic high molecule liquid crystal activeness and quietness composite polyolefine material prepared by string powder；In addition thermic
Property liquid crystal be uniformly dispersed in matrix moulded by wood, improve wood and mould the rheological behaviour in process, and consumption is less, and cost is relatively low,
Achieve the purpose reaching wood is moulded modification by modified resin base body, for WPC actual production research, there is important meaning
Justice.
The polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness prepared by present embodiment, hot strength
Improving 10%～40%, bending strength improves 20%～40%, and impact strength improves 30-60% so that wood plastic composite power
Learn and carry out activeness and quietness modification simultaneously.
Detailed description of the invention two: present embodiment is unlike detailed description of the invention one: described polyolefin is poly-second
A kind of or the most several mixture in alkene, polypropylene, polyvinyl chloride and polystyrene；Described compatilizer is Malaysia
The polypropylene of acid anhydride-grafted polyethylene, maleic anhydride grafting, titanate esters, isocyanide ester, amino silane, vinyl silanes
With a kind of or the most several mixture in methacryloxypropyl silane.Other is identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment is unlike one of detailed description of the invention one or two: described heat
Cause property liquid crystal is the Xydar series liquid crystal of P-hydroxybenzoic acid '-biphenyl diphenol terephthaldehyde's acid copolymer, P-hydroxybenzoic acid pair
The Vectra series liquid crystal of hydroxynaphthoic acid copolymer and ethylene glycol terephthalate P-hydroxybenzoic acid copolymer
A kind of or the most several mixture in Rodrun series liquid crystal；Described lubricant be paraffin, Tissuemat E, poly-third
A kind of or the most several mixture in alkene wax, stearic acid, Metallic stearates and ethylene-acrylic acid copolymer slaine.
Other is identical with detailed description of the invention one or two.
Detailed description of the invention four: present embodiment is unlike detailed description of the invention one to three: described string
Powder is a kind of or the most several the mixing in wood powder, bamboo powder, agricultural residues powder, shell powder, bagasse and powdered rice hulls
Compound.Other is identical with detailed description of the invention one to three.
Detailed description of the invention five: present embodiment is unlike detailed description of the invention one to four: described crops straw
Stalk powder is maize straw, wheat stalk, soybean stalk or rice straw.Other is identical with detailed description of the invention one to four.
Detailed description of the invention six: a kind of thermotropic high molecule liquid crystal activeness and quietness polyolefin sill described in present embodiment
The preparation method of plastic composite materials, follows the steps below:
One, weigh: by mass fraction weigh 20 parts～100 parts of polyolefin, 30 parts～200 parts of string powders, 2 parts
～8 parts of compatilizers, 1 part～5 parts of lubricants and 0.1 part～5 parts of thermotropic liquid crystals；
Two, 20 parts step one weighed～100 parts of polyolefin, 2 parts～8 parts of compatilizers and 0.1 part～5 parts of thermotropic liquid
Crystalline substance mixes, and obtains mixture A, and mixture A extruder is carried out granulation, and prilling temperature is 170 DEG C～250 DEG C,
Obtain liquid crystal and strengthen composite polyolefine material；
Three, 30 parts step one weighed～200 parts of string powders, 1 part～5 parts of lubricants and liquid crystal strengthen polyene
Hydrocarbon composite is uniform in high-speed mixer and mixing, obtains mixture B, then by extruder, mixture B is carried out granulation,
Prilling temperature is 145 DEG C～220 DEG C, obtains wood and moulds pellet；
Four, wood is moulded pellet and is shaped processing, i.e. obtain thermotropic high molecule liquid crystal activeness and quietness polyolefin sill and mould
Composite.
Extruder described in present embodiment step 2 is single screw extrusion machine or double screw extruder.
Extruder described in present embodiment step 3 is single screw extrusion machine or double screw extruder.
Liquid crystal polymer (LCP) is a kind of to be made up of rigid molecule chain, can occur existing liquid under certain physical condition
Activity have again the polymer substance of physical property anisotropic states (this state is referred to as liquid crystal state) of crystal.Thermotropic
Liquid crystal (TLCP), in its liquid crystal phase transition region, can form fento orientation texture, produces the self-reinforcing of height, toughness reinforcing work
With.LCP may also operate as causing crazing and shear band effect in modified resin, be easily formed under external force particle or
Fento, is present in resin matrix with disperse phase, and under stress effect, the LCP as dispersion phase can cause silver
Line and shear band, make the stress of Near A Crack Tip concentrate and relaxed, hinder the extension of crackle, and system consumes big energy,
So that resin toughness is improved.Due to the outspoken nature of TLCP molecular structure, can be spontaneously along stream in process
Dynamic direction orientation, produces obvious shear shinning behavior and self-reinforcing effect, thus forms in-situ composite.With traditional
Fiber (such as glass fibre, carbon fiber) strengthens to be compared, and can reduce the melt viscosity of TP with TLCP modification, make processing flow
Performance is improved, and reduces machine-shaping energy consumption, improves the economy of processing.
Present embodiment provides the benefit that: thermotropic high molecule liquid crystal activeness and quietness prepared by present embodiment is polyolefin-based
Wood plastic composite outstanding feature is, by thermotropic liquid crystal higher for fusing point and TPO in the presence of compatilizer,
By melt blending at a temperature of coupling, under the effect of temperature and shearing force, form fento orientation texture, with dispersion phase
Form is present in polyolefin resin matrix, solves other and strengthens mutually as fiber, nano particle disperse inequality in matrix moulded by wood
Even problem；Under stress effect, the thermotropic liquid crystal as dispersion phase can cause crazing and shear band, makes Near A Crack Tip
Stress concentrate and relaxed, hinder the extension of crackle, system consumes big energy, and liquid crystal fine fibrilation moulds enhancing with wood
The string of phase can play the collaborative effect strengthening polyolefin resin matrix, reach to significantly improve simultaneously intensity that wood moulds and
The effect of toughness, so its intensity moulded by wood prepared by the present invention and toughness is not only far above Traditional Wood moulding material, and performance is remote
Higher than not adding the thermotropic high molecule liquid crystal activeness and quietness composite polyolefine material prepared by string powder；In addition thermic
Property liquid crystal be uniformly dispersed in matrix moulded by wood, improve wood and mould the rheological behaviour in process, and consumption is less, and cost is relatively low,
Achieve the purpose reaching wood is moulded modification by modified resin base body, for WPC actual production research, there is important meaning
Justice.
The polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness prepared by present embodiment, hot strength
Improving 10%～40%, bending strength improves 20%～40%, and impact strength improves 30-60% so that wood plastic composite power
Learn and carry out activeness and quietness modification simultaneously.
Detailed description of the invention seven: present embodiment is unlike detailed description of the invention six: gathering described in step one
Alkene is a kind of or the most several mixture in polyethylene, polypropylene, polyvinyl chloride and polystyrene；In step
Described compatilizer is the polyethylene of maleic anhydride grafting, the polypropylene of maleic anhydride grafting, titanate esters, isocyanide ester, ammonia
A kind of or the most several mixture in base silane, vinyl silanes and methacryloxypropyl silane；Institute in step one
The thermotropic liquid crystal stated is the Xydar series liquid crystal of P-hydroxybenzoic acid '-biphenyl diphenol terephthaldehyde's acid copolymer, para hydroxybenzene
Formic acid is to the Vectra series liquid crystal of hydroxynaphthoic acid copolymer and ethylene glycol terephthalate P-hydroxybenzoic acid copolymer
Rodrun series liquid crystal in a kind of or the most several mixtures；Lubricant described in step one is paraffin, poly-second
A kind of or the most several in alkene wax, polypropylene wax, stearic acid, Metallic stearates and ethylene-acrylic acid copolymer slaine
Mixture；String powder described in step one is wood powder, bamboo powder, agricultural residues powder, shell powder, sugarcane
A kind of or the most several mixture in slag and powdered rice hulls.Other is identical with detailed description of the invention six.
Detailed description of the invention eight: present embodiment is unlike one of detailed description of the invention six or seven: described agriculture
Crop material powder is maize straw, wheat stalk, soybean stalk or rice straw.Other is with detailed description of the invention six or seven
Identical.
Detailed description of the invention nine: present embodiment is unlike one of detailed description of the invention six to eight: in step 4
Described processing and forming is extrusion molding, injection mo(u)lding or hot-forming.Other is identical with detailed description of the invention six to eight.
Detailed description of the invention ten: present embodiment is unlike one of detailed description of the invention six to nine: when described
When processing and forming is extrusion molding, extrusion temperature is 140 DEG C～200 DEG C, and die temperature is 140 DEG C～200 DEG C；When described
When processing and forming is injection mo(u)lding, injecting machine material tube temperature is 160 DEG C～240 DEG C, and nozzle temperature is 160 DEG C～240 DEG C, note
Injection pressure is 30MPa～60MPa；When described processing and forming is hot-forming, hot pressing temperature is 140 DEG C～200 DEG C,
Pressure is 1.5MPa～7.5MPa, shapes after cooling.Other is identical with detailed description of the invention six to nine.
Extrusion molding described in present embodiment uses single screw extrusion machine or double screw extruder.
Employing following example checking beneficial effects of the present invention:
Embodiment one:
The preparation of a kind of polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness described in the present embodiment
Method, specifically follows the steps below:
One, weigh: weigh 40 parts of polyolefin, 55 parts of string powders, 3 parts of compatilizers, 2 parts of profits by mass fraction
Lubrication prescription and 1.2 parts of thermotropic liquid crystals；
Two, 40 parts of polyolefin step one weighed, 3 parts of compatilizers and 1.2 parts of thermotropic liquid crystals mix, and are mixed
Compound A, carries out granulation by mixture A double screw extruder, prilling temperature one to seven district be followed successively by 195 DEG C, 200 DEG C,
210 DEG C, 220 DEG C, 220 DEG C, 215 DEG C and 205 DEG C, screw speed is 30r/min, obtains liquid crystal enhancing polyolefin and is combined
Material；
Three, 55 parts of string powders step one weighed, 2 parts of lubricants and liquid crystal strengthen composite polyolefine material and exist
High-speed mixer and mixing is uniform, obtains mixture B, then by double screw extruder, mixture B is carried out granulation, granulation
Temperature one to seven district is followed successively by 145 DEG C, 150 DEG C, 155 DEG C, 160 DEG C, 165 DEG C, 160 DEG C and 155 DEG C, and screw speed is
30r/min, obtains wood and moulds pellet；
Four, wood is moulded pellet and is shaped processing, obtain thermotropic high molecule liquid crystal activeness and quietness polyolefin sill and mould multiple
Condensation material.
Polyolefin described in step one is polyethylene: trade mark 5000S, Daqing petrochemical；
Compatilizer described in step one is the polyethylene of maleic anhydride grafting, and percent grafting is 1wt%, melt index
>=50g/10min, Rizhisheng New Technology Development Co., Ltd., Shanghai；
Thermotropic liquid crystal model described in step one is A950, for P-hydroxybenzoic acid to hydroxynaphthoic acid copolymer
Vectra series liquid crystal, Dongguan City camphorwood Tou Huaxin plastic material Co., Ltd；
Lubricant described in step one is paraffin, commercially available；
String powder described in step one is Poplar Powder, 20 mesh～80 mesh, moisture content≤3%.
Processing and forming described in step 4 be Single screw extrusion shaping time, set a district to four district's temperature be followed successively by 145 DEG C,
150 DEG C, 160 DEG C and 165 DEG C, mould temperature is 170 DEG C, and screw speed is 15r/min.
Embodiment two: present embodiment is unlike embodiment one: weigh 40 parts by mass fraction in step one and gather
Alkene, 55 parts of string powders, 3 parts of compatilizers, 2 parts of lubricants and 2.4 parts of thermotropic liquid crystals.Other and embodiment
One is identical.
Embodiment three: present embodiment is unlike embodiment one: weigh 40 parts by mass fraction in step one and gather
Alkene, 55 parts of string powders, 3 parts of compatilizers, 2 parts of lubricants and 3.6 parts of thermotropic liquid crystals.Other and embodiment
One is identical.
Contrast test one: the contrast test of embodiment one to three, present embodiment is unlike embodiment one: step
40 parts of polyolefin, 55 parts of string powders, 3 parts of compatilizers and 2 parts of lubricants are weighed by mass fraction in rapid one.Its
It is identical with embodiment one.
Embodiment four:
A kind of thermotropic high molecule liquid crystal activeness and quietness composite polyolefine material described in the present embodiment, specifically according to
Lower step is carried out:
One, weigh: weigh 40 parts of polyolefin, 3 parts of compatilizers and 1.2 parts of thermotropic liquid crystals by mass fraction；
Two, 40 parts of polyolefin step one weighed, 3 parts of compatilizers and 1.2 parts of thermotropic liquid crystals mix, and are mixed
Compound A, carries out granulation by mixture A double screw extruder, prilling temperature one to seven district be followed successively by 195 DEG C, 200 DEG C,
210 DEG C, 220 DEG C, 220 DEG C, 215 DEG C and 205 DEG C, screw speed is 30r/min, obtains liquid crystal enhancing polyolefin and is combined
Material；
Three, liquid crystal is strengthened composite polyolefine material and is shaped processing, obtain thermotropic high molecule liquid crystal activeness and quietness and gather
Alkene composite.
Polyolefin described in step one is polyethylene: trade mark 5000S, Daqing petrochemical；
Compatilizer described in step one is the polyethylene of maleic anhydride grafting, and percent grafting is 1wt%, melt index
>=50g/10min, Rizhisheng New Technology Development Co., Ltd., Shanghai；
Thermotropic liquid crystal model described in step one is A950, for P-hydroxybenzoic acid to hydroxynaphthoic acid copolymer
Vectra series liquid crystal, Dongguan City camphorwood Tou Huaxin plastic material Co., Ltd；
Processing and forming described in step 3 be Single screw extrusion shaping time, set a district to four district's temperature be followed successively by 145 DEG C,
150 DEG C, 160 DEG C and 165 DEG C, mould temperature is 170 DEG C, and screw speed is 15r/min.
Embodiment five: present embodiment is unlike embodiment four: weigh 40 parts by mass fraction in step one and gather
Alkene, 3 parts of compatilizers and 2.4 parts of thermotropic liquid crystals.Other is identical with embodiment four.
Embodiment six: present embodiment is unlike embodiment four: weigh 40 parts by mass fraction in step one and gather
Alkene, 3 parts of compatilizers and 3.6 parts of thermotropic liquid crystals.Other is identical with embodiment four.
Contrast test two: the contrast test of embodiment four to six, present embodiment is unlike embodiment four: step
40 parts of polyolefin and 3 parts of compatilizers are weighed by mass fraction in rapid one.Other is identical with embodiment four.
To the polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness of embodiment one to three preparation and to having a competition
The composite testing a preparation carries out static mechanical property test, stretches, bends and impact strength test, result such as table 1
Shown in.
Thermotropic high molecule liquid crystal activeness and quietness composite polyolefine material and contrast test two to embodiment four to six preparation are made
Standby composite carries out static mechanical property test, stretches, bends and impact strength test, and result is as shown in table 2.
Table 1: thermotropic high molecule liquid crystal activeness and quietness polyolefin-based wood plastic composite mechanical experimental results
| Test event | Tensile strength (MPa) | Bending strength (MPa) | Shock strength (kJ/m2) |
| Method of testing | ASTM D638-03 | ASTM D790-03 | ASTM D4812 |
| Embodiment one | 38.76±0.40 | 64.32±0.88 | 11.95±0.77 |
| Embodiment two | 39.40±0.59 | 66.00±1.73 | 12.09±0.77 |
| Embodiment three | 40.33±0.44 | 66.44±2.43 | 11.98±1.03 |
| Contrast test one | 30.13±1.03 | 52.12±2.20 | 8.75±0.44 |
Table 2: thermotropic high molecule liquid crystal activeness and quietness composite polyolefine material mechanical experimental results
| Test event | Tensile strength (MPa) | Bending strength (MPa) | Shock strength (kJ/m2) |
| Method of testing | ASTM D638-03 | ASTM D790-03 | ASTM D256 |
| Embodiment four | 32.32±1.6 | 49.57±4.54 | 25.36±0.97 |
| Embodiment five | 31.23±1.93 | 55.09±2.11 | 26.24±1.77 |
| Embodiment six | 32.17±3.04 | 55.21±4.43 | 26.5±1.33 |
| Contrast test two | 29.98±1.39 | 46.06±1.8 | 22.05±1.12 |
As seen from table, embodiment one, two, three and contrast test one all granulation extrusions under identical experiment condition, work as thermic
When property liquid crystal adds 1.2,2.4,3.6 parts respectively, the polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness
Tensile strength is respectively increased 28.64%, 30.77%, 33.85%；Bending strength is respectively increased 23.41%, 26.63%, 27.48%；
Shock strength is respectively increased 36.57%, 38.17%, 36.91%；Embodiment four, five and six is all under identical experiment condition
Granulation is extruded, and is added without string powder, and the thermotropic high molecule liquid crystal activeness and quietness composite polyolefine material prepared resists
Tensile strength is basically unchanged compared with embodiment one, two and three；Bending strength is respectively increased 7.6%, 19.6%, 19.87%；
Shock strength is respectively increased 15.01%, 19.0%, 20.18%.As known from the above, add thermotropic liquid crystal and can improve polyene
The intensity of hydrocarbon material and toughness, and add string powder, owing to liquid crystal fine fibrilation and wood are moulded, to strengthen the string of phase permissible
Play the collaborative effect strengthening polyolefin resin matrix, so add thermotropic liquid crystal can improve wood plastic composite simultaneously
Intensity and toughness, and performance improvement is more preferably, the raising to its mechanical property has important meaning.
Claims (4)
1. the polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness, it is characterised in that a kind of thermic
The property polyolefin-based wood plastic composite of high molecule liquid crystal activeness and quietness press mass fraction by 20 parts～100 parts of polyolefin, 30 parts
～prepared by 200 parts of string powders, 2 parts～8 parts of compatilizers, 1 part～5 parts of lubricants and 0.1 part～5 parts of thermotropic liquid crystals
Form；
The preparation method of above-mentioned a kind of polyolefin-based wood plastic composite of thermotropic high molecule liquid crystal activeness and quietness is by following
Step is carried out:
One, weigh: by mass fraction weigh 20 parts～100 parts of polyolefin, 30 parts～200 parts of string powders, 2 parts～8
Part compatilizer, 1 part～5 parts of lubricants and 0.1 part～5 parts of thermotropic liquid crystals；
Two, 20 parts step one weighed～100 parts of polyolefin, 2 parts～8 parts of compatilizers and 0.1 part～5 parts of thermotropic liquid crystals
Mixing, obtain mixture A, mixture A extruder is carried out granulation, prilling temperature is 170 DEG C～250 DEG C,
Composite polyolefine material is strengthened to liquid crystal；
Three, 30 parts step one weighed～200 parts of string powders, 1 part～5 parts of lubricants and liquid crystal strengthen polyolefin
Composite is uniform in high-speed mixer and mixing, obtains mixture B, then by extruder, mixture B is carried out granulation, make
Grain temperature is 145 DEG C～220 DEG C, obtains wood and moulds pellet；
Four, wood is moulded pellet and is shaped processing, i.e. obtain thermotropic high molecule liquid crystal activeness and quietness polyolefin sill and mould multiple
Condensation material；
Processing and forming described in step 4 is extrusion molding, injection mo(u)lding or hot-forming；
When described processing and forming is extrusion molding, extrusion temperature is 140 DEG C～200 DEG C, and die temperature is
140 DEG C～200 DEG C；When described processing and forming is injection mo(u)lding, injecting machine material tube temperature is 160 DEG C～240 DEG C, nozzle temperature
Degree is 160 DEG C～240 DEG C, and injection pressure is 30MPa～60MPa；When described processing and forming is hot-forming, hot pressing temperature
Degree is 140 DEG C～200 DEG C, and pressure is 1.5MPa～7.5MPa, shapes after cooling；
Described thermotropic liquid crystal is the Xydar series liquid crystal of P-hydroxybenzoic acid '-biphenyl diphenol terephthaldehyde's acid copolymer, right
Vectra series liquid crystal and the ethylene glycol terephthalate P-hydroxybenzoic acid of hydroxynaphthoic acid copolymer are total to by hydroxybenzoic acid
A kind of or the most several mixture in the Rodrun series liquid crystal of polymers；Described lubricant be paraffin, Tissuemat E,
A kind of or the most several mixing in polypropylene wax, stearic acid, Metallic stearates and ethylene-acrylic acid copolymer slaine
Thing.
A kind of polyolefin-based wood and plastic composite of thermotropic high molecule liquid crystal activeness and quietness the most according to claim 1
Material, it is characterised in that described polyolefin is a kind of or the most several in polyethylene, polypropylene, polyvinyl chloride and polystyrene
The mixture planted；Described compatilizer be maleic anhydride grafting polyethylene, maleic anhydride grafting polypropylene, titanate esters,
A kind of or the most several mixture in isocyanide ester, amino silane, vinyl silanes and methacryloxypropyl silane.
A kind of polyolefin-based wood and plastic composite of thermotropic high molecule liquid crystal activeness and quietness the most according to claim 1
Material, it is characterised in that described string powder is wood powder, bamboo powder, agricultural residues powder, shell powder, bagasse and rice
A kind of or the most several mixture in shell powder.
A kind of polyolefin-based wood and plastic composite of thermotropic high molecule liquid crystal activeness and quietness the most according to claim 3
Material, it is characterised in that described agricultural residues powder is maize straw, wheat stalk, soybean stalk or rice straw.
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| CN106243555A (en) * | 2016-08-02 | 2016-12-21 | 合肥文武信息技术有限公司 | A kind of communications cable material improving thermostability |
| CN106188961A (en) * | 2016-08-02 | 2016-12-07 | 合肥文武信息技术有限公司 | A kind of from fire-retardant can the communications cable material of insect protected |
| CN109371501B (en) * | 2018-11-01 | 2020-03-20 | 东北林业大学 | Plant fiber composite wire with shape memory function for 3D printing and preparation method thereof |
| CN112266587A (en) * | 2020-10-29 | 2021-01-26 | 银金达(上海)新材料有限公司 | High-strength PETG material and application thereof |
| CN113930039A (en) * | 2021-11-18 | 2022-01-14 | 益阳桃花江竹业发展有限公司 | Bamboo-plastic composite board material for container bottom board |
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