CN107216591A - A kind of high heat-resisting sisal fiber modified SBS composite and preparation method thereof - Google Patents
A kind of high heat-resisting sisal fiber modified SBS composite and preparation method thereof Download PDFInfo
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- C08L51/006—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to block copolymers containing at least one sequence of polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
- D06M11/59—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with ammonia; with complexes of organic amines with inorganic substances
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Abstract
The present invention relates to a kind of SBS composites, and in particular to a kind of high heat-resisting sisal fiber modified SBS composite, and by weight, it includes following component：50~70 parts of SBS, 6~13 parts of polypropylene, modified 5~10 parts of sisal fiber, 10~15 parts of methyl methacrylate, 2~5 parts of ceramic fibre, 0.5~2 part of nano magnesia, 0.5~2 part of antioxidant, 0.5~1 part of lubricant.Present invention also offers the preparation method of above-mentioned SBS composites.The features such as SBS composites prepared by the inventive method have high temperature resistant, shock resistance is excellent.
Description
Technical field
The present invention relates to a kind of SBS composite modifications technical field, in particular, it is related to a kind of high heat-resisting sisal hemp fine
Tie up modified SBS composite and preparation method thereof.
Background technology
Sisal hemp belongs to Agavaceae, is a kind of perennial crudefiber crop economic plants planted extensively, and the sisal hemp for being derived from its blade is fine
Dimension is pure white with color and luster, and seawater corrosion resistance is strong but pliable in texture, and density is small, and tensile strength and modulus are high, and wide material sources are cheap,
Therefore, sisal fiber has a clear superiority for preparing the inexpensive fiber-reinforced polymer-matrix compound of high-strength and high-modulus.
SBS (SBS) is the block copolymer using styrene as monomer, is had concurrently
The characteristic of plastics and rubber, low temperature performance excellent good with chemical stability, the advantage such as cheap and processing is convenient, is work
One of important general-purpose plastics in industry, but its impact strength is not high, yielding, poor heat resistance, so that its application is received
Limitation.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of high temperature resistant, the shock resistance being modified using sisal fiber is excellent
Good SBS composites.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions：A kind of high heat-resisting sisal hemp is fine
Modified SBS composite is tieed up, by weight, following component is included：50~70 parts of SBS, 6~13 parts of polypropylene, modified sisal hemp
5~10 parts of fiber, 10~15 parts of methyl methacrylate, 2~5 parts of ceramic fibre, 0.5~2 part of nano magnesia, antioxidant
0.5~2 part, 0.5~1 part of lubricant, 0.01~0.05 part of zinc oxide, the high heat-resisting sisal fiber modified SBS composite
Preparation method, comprise the following steps：
1) by 50~70 parts of SBS, 10~15 parts of methyl methacrylates and 0.01~0.05 part of zinc oxide, it is placed in high pressure
In reactor, air in kettle is extracted, carbon dioxide is injected, autoclave is placed in water bath, radiation appliance is opened, in magnetic
Reaction temperature is warming up under power stirring, is reacted, grafting SBS is obtained；
2) grafting SBS is dissolved in hexamethylene, adds and hydrogen peroxide is added under organic acid, constant temperature, stirring condition, reaction knot
Beam, obtains epoxidation grafting SBS；
3) by step 2) in epoxidation grafting SBS, 6~13 parts of polypropylene, modified 5~10 parts of sisal fiber, ceramics are fine
2~5 parts of dimension, 0.5~2 part of nano magnesia, 0.5~1 part of 0.5~2 part of antioxidant and lubricant are mixed and stirred for uniformly, putting
Granulate, dry through pelleter after carrying out internally mix, circulating water in banbury, obtain the SBS that high heat-resisting sisal fiber is modified
Composite.
Preferably, step 1) in, the pressure of the carbon dioxide in kettle is 20~50MPa, and the temperature of reaction is 80~100
DEG C, the reaction time is 2~4h, and the radiation source of described radiation appliance is cobalt -60, and dose of radiation is 30~50kGy, magnetic agitation
Rotating speed be 30~50r/min.
Preferably, step 2) in, described organic acid is formic acid or acetic acid, and the temperature of constant temperature is 40~70 DEG C, stirring
Rotating speed is 20~30r/min, and the reaction time is 2~4h.
Preferably, the preparation method of described modification sisal fiber is：It is 1~3cm by sisal fiber Mechanical Crushing, puts
In in pressure pan, explosion treatment is carried out, 3~5h is soaked for 20~30% ammoniacal liquor in mass fraction, washs to neutrality, changed
Property sisal fiber.
Preferably, in the tank of explosion treatment temperature be 150~200 DEG C, in tank pressure be 1~5MPa, keep 5~
10min, pressure inside the tank release time is 0.01~0.1s.
Preferably, described antioxidant be phenyl-β-amine-resistant, three (2,4- di-tert-butyl-phenyl) phosphite esters with it is hard
Ester acyl tannate, is in mass ratio (1~2):(1~2):(0.5~1) mixing composition.
Preferably, described lubricant is the one or more in zinc stearate, calcium stearate, silicone master batch, paraffin.
Preferably, the internally mix temperature in banbury is 250~280 DEG C, and screw speed is 30~50r/min, during internally mix
Between be 60~80min.
Advantages of the present invention：SBS polarity is small, by grafted methacrylic acid methyl ester, not only has SBS excellent
Adhesive property and adhesive strength, also improve SBS heat resistance, its heat resisting temperature is improved more than 80 DEG C；Overcritical
Make in carbon dioxide maleic anhydride in SBS have preferable diffusivity, in the presence of catalyst zinc oxide by cobalt-
60 radiation make Maleic anhydride-containg polyethylene, without using initiator, and grafting success rate is high, and 30% is improved than traditional grafting method
More than；Sisal fiber reuses ammoniacal liquor immersion after explosion treatment, reaches the content of cellulose of the modification sisal fiber of preparation
More than 99.5%, fiber becomes thinner smaller, and face crack is more, and specific surface area improves more than 15%；Grafting SBS passes through epoxy
Epoxy radicals after change at high temperature can be with modified sisal cellulose surface hydroxyl reaction, making the SBS composites of preparation has
Higher heat resistance, intensity and shock resistance；Ceramic fibre and nano magnesia are added, the hard of SBS composites is enhanced
Degree, improves the heat resistance of SBS composites；By adding a certain proportion of antioxidant, the chain type of free radical can be blocked
Reaction, can play good antioxidation.SBS composites prepared by the inventive method are distinguished with common SBS composites
Dimension card heat resistant test is carried out, when deformation quantity is 2mm, SBS composites prepared by the inventive method are than common SBS composites
Deformation temperature is higher by more than 34%.
Embodiment
Further advantage, target and the feature of the present invention embodies part by following explanation, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Following embodiments are used to further illustrate but be not limited to the present invention.
Embodiment 1
A kind of high heat-resisting sisal fiber modified SBS composite, by weight, includes following component：50 parts of SBS, gathers
6 parts of propylene, modified 5 parts of sisal fiber, 10 parts of methyl methacrylate, 5 parts of ceramic fibre, 0.5 part of nanoscale magnesium, antioxygen
0.5 part of agent, 1 part of lubricant, 0.01 part of zinc oxide, the preparation side of described high heat-resisting sisal fiber modified SBS composite
Method, comprises the following steps：
1) by 50 parts of SBS, 10 parts of methyl methacrylates and 0.01 part of zinc oxide, it is placed in autoclave, extracts
Air in kettle, injects carbon dioxide, autoclave is placed in water bath, opens radiation appliance, heats up under magnetic stirring
To reaction temperature, reacted, obtain grafting SBS；
2) grafting SBS is dissolved in hexamethylene, adds and hydrogen peroxide is added under organic acid, constant temperature, stirring condition, reaction knot
Beam, is washed, drying, obtains epoxidation grafting SBS；
3) by step 2) in epoxidation grafting SBS, 6 parts of polypropylene, modified 5 parts of sisal fiber, 5 parts of ceramic fibre, grain
Footpath is 30~50nm 0.5 part of magnesia, and 1 part of 0.5 part of antioxidant and lubricant are mixed and stirred for uniformly, being placed in banbury
Granulate, dry through pelleter after carrying out internally mix, circulating water, obtain the SBS composites that high heat-resisting sisal fiber is modified.
Polypropylene has excellent heat resistance, and the high-temperature behavior of SBS composites can be improved by adding polypropylene；SBS pole
Property is small, by grafted methacrylic acid methyl ester, SBS is had excellent adhesive property and adhesive strength, also improves
SBS heat resistance, makes its heat resisting temperature improve more than 80 DEG C；First is made by the radiation of cobalt -60 in supercritical carbon dioxide
Base methyl acrylate is grafted SBS, without using initiator, and grafting success rate is high, and 15% is improved than traditional grafting method
More than；Sisal fiber is soaked in ammoniacal liquor again after explosion treatment, makes the content of cellulose of sisal fiber up to 99.5%
More than, fiber becomes thinner smaller, and face crack is more, and specific surface area improves more than 15%；SBS is grafted after epoxidation
Epoxy radicals at high temperature can be with modified sisal fiber surface hydroxyl reaction, make preparation SBS composites have it is higher strong
Degree and impact property；The nano magnesia prepared using thermal decomposition method, with abundant endoporus, the air contained in hole is hot
Non-conductor, can play good heat-blocking action, ceramic fibre is a kind of fibrous light refractory material, with lightweight, resistance to
The advantages of high temperature, heat endurance are good, low thermal conductivity, specific heat are small and mechanical resistant shakes, adds ceramic fibre and nano magnesia, increases
The strong hardness of SBS composites, improves the heat resistance of SBS composites；By adding a certain proportion of antioxidant,
The chain reaction of free radical can be blocked, good antioxidation can be played.The inventive method prepare SBS composites with it is general
Logical SBS composites carry out tieing up card heat resistant test respectively, when deformation quantity is 2mm, SBS composites ratio prepared by the inventive method
The deformation temperature of common SBS composites is higher by more than 34%.
Embodiment 2
A kind of high heat-resisting sisal fiber modified SBS composite, by weight, includes following component：70 parts of SBS, gathers
13 parts of propylene, modified 10 parts of sisal fiber, 15 parts of methyl methacrylate, 2 parts of ceramic fibre, 2 parts of nano magnesia is anti-oxidant
2 parts of agent, 0.5 part of lubricant, 0.05 part of zinc oxide, the preparation method of described high heat-resisting sisal fiber modified SBS composite,
Comprise the following steps：
1) 70 parts of SBS, 15 parts of methyl methacrylates are placed in autoclave with 0.05 part of zinc oxide, extract kettle
Interior air, injects carbon dioxide, and the pressure for making the carbon dioxide in kettle is 20MPa, and autoclave is placed in water bath, plus
Heat opens the radiation appliance that radiation source is cobalt -60, dose of radiation is 50kGy to 100 DEG C of reaction temperature, is 30r/min in rotating speed
Magnetic agitation under be warming up to reaction temperature, carry out reaction 2h, obtain grafting SBS；
2) grafting SBS is dissolved in hexamethylene, adds and hydrogen peroxide is added under organic acid, constant temperature, stirring condition, reaction knot
Beam, is washed, drying, obtains epoxidation grafting SBS；
3) by step 2) in epoxidation grafting SBS, 13 parts of polypropylene, modified 10 parts of sisal fiber, 2 parts of ceramic fibre,
0.5 part of 2 parts of nano magnesia, 2 parts of antioxidant and lubricant are mixed and stirred for uniformly, being placed in banbury and carrying out internally mix, follow
Granulate, dry through pelleter after ring water cooling, obtain the SBS composites that high heat-resisting sisal fiber is modified.
Supercritical carbon dioxide is as the medium of chemical reaction, and low with viscosity, diffusion coefficient is big, nontoxic, non-ignitable, has
The advantages of chemical inertness, using supercritical carbon dioxide as reaction medium, radiation grafting is carried out using cobalt -60, is not only avoided
Initiator is added, the introducing of impurity is reduced, also short with the reaction time, the advantages of grafting success rate is high.
Embodiment 3
A kind of high heat-resisting sisal fiber modified SBS composite, by weight, includes following component：70 parts of SBS, gathers
13 parts of propylene, modified 10 parts of sisal fiber, 15 parts of methyl methacrylate, 2 parts of ceramic fibre, 2 parts of nano magnesia is anti-oxidant
2 parts of agent, 0.5 part of lubricant, 0.03 part of zinc oxide, the preparation method of described high heat-resisting sisal fiber modified SBS composite,
Comprise the following steps：
1) 70 parts of SBS, 15 parts of methyl methacrylates are placed in autoclave with 0.03 part of zinc oxide, extract kettle
Interior air, injects carbon dioxide, and the pressure for making the carbon dioxide in kettle is 20MPa, and autoclave is placed in water bath, plus
Heat opens the radiation appliance that radiation source is cobalt -60, dose of radiation is 50kGy to 100 DEG C of reaction temperature, is 50r/min in rotating speed
Magnetic agitation under be warming up to reaction temperature, carry out reaction 4h, obtain grafting SBS；
2) grafting SBS is dissolved in hexamethylene, adds and add under formic acid, the stirring condition that 40 DEG C of constant temperature, rotating speed are 20r/min
Enter hydrogen peroxide, react 4h, reaction terminates, add ethanol precipitation and wash the unreacted formic acid of removal, hydrogen peroxide etc., dry
It is dry, obtain epoxidation grafting SBS；
3) by step 2) in epoxidation grafting SBS, 13 parts of polypropylene, modified 10 parts of sisal fiber, 2 parts of ceramic fibre,
0.5 part of 2 parts of nano magnesia, 2 parts of antioxidant and lubricant are mixed and stirred for uniformly, being placed in banbury and carrying out internally mix, follow
Granulate, dry through pelleter after ring water cooling, obtain the SBS composites that high heat-resisting sisal fiber is modified.
Embodiment 4
A kind of high heat-resisting sisal fiber modified SBS composite, by weight, includes following component：70 parts of SBS, gathers
13 parts of propylene, modified 10 parts of sisal fiber, 15 parts of methyl methacrylate, 2 parts of ceramic fibre, 2 parts of nano magnesia is anti-oxidant
2 parts of agent, 0.5 part of lubricant, 0.04 part of zinc oxide, the preparation method of described high heat-resisting sisal fiber modified SBS composite,
Comprise the following steps：
1) 70 parts of SBS, 15 parts of methyl methacrylates are placed in autoclave with 0.04 part of zinc oxide, extract kettle
Interior air, injects carbon dioxide, and the pressure for making the carbon dioxide in kettle is 20MPa, and autoclave is placed in water bath, plus
Heat opens the radiation appliance that radiation source is cobalt -60, dose of radiation is 50kGy to 100 DEG C of reaction temperature, is 30r/min in rotating speed
Magnetic agitation under be warming up to reaction temperature, carry out reaction 4h, obtain grafting SBS；
2) grafting SBS is dissolved in hexamethylene, adds and add under formic acid, the stirring condition that 70 DEG C of constant temperature, rotating speed are 20r/min
Enter hydrogen peroxide, react 4h, reaction terminates, washing removes unreacted formic acid, hydrogen peroxide etc., drying obtains epoxidation and connect
Branch SBS；
3) by step 2) in epoxidation grafting SBS, 13 parts of polypropylene, modified 10 parts of sisal fiber, 2 parts of ceramic fibre,
0.5 part of 2 parts of nano magnesia, 2 parts of antioxidant and lubricant are mixed and stirred for uniformly, wherein the preparation side of modified sisal fiber
It by sisal fiber Mechanical Crushing is 1cm that method, which is, is placed in pressure pan, carries out steam explosion treatment, is 20% in mass fraction
3h is soaked in ammoniacal liquor, is washed to neutrality, is placed in banbury and carries out internally mix, granulated after circulating water through pelleter, dries, obtains
Obtain the SBS composites that high heat-resisting sisal fiber is modified.
Sisal fiber passes through ammoniacal liquor explosion treatment, and content of cellulose is up to 99.8%, and fiber also becomes thinner smaller, and surface is split
Line is also more, and specific surface area improves more than 15% than traditional steam explosion.
Embodiment 5
A kind of high heat-resisting sisal fiber modified SBS composite, by weight, includes following component：70 parts of SBS, gathers
13 parts of propylene, modified 10 parts of sisal fiber, 15 parts of methyl methacrylate, 2 parts of ceramic fibre, 2 parts of nano magnesia is anti-oxidant
2 parts of agent, 0.5 part of lubricant, 0.05 part of zinc oxide, the preparation method of described high heat-resisting sisal fiber modified SBS composite,
Comprise the following steps：
1) 70 parts of SBS, 15 parts of methyl methacrylates are placed in autoclave with 0.05 part of zinc oxide, extract kettle
Interior air, injects carbon dioxide, and the pressure for making the carbon dioxide in kettle is 20MPa, and autoclave is placed in water bath, plus
Heat opens the radiation appliance that radiation source is cobalt -60, dose of radiation is 50kGy to 100 DEG C of reaction temperature, is 40r/min in rotating speed
Magnetic agitation under be warming up to reaction temperature, carry out reaction 4h, obtain grafting SBS；
2) grafting SBS is dissolved in hexamethylene, adds and add under formic acid, the stirring condition that 50 DEG C of constant temperature, rotating speed are 20r/min
Enter hydrogen peroxide, react 4h, reaction terminates, washing removes unreacted formic acid, hydrogen peroxide etc., drying obtains epoxidation and connect
Branch SBS；
3) by step 2) in epoxidation grafting SBS, 13 parts of polypropylene, modified 10 parts of sisal fiber, 2 parts of ceramic fibre,
0.5 part of 2 parts of nano magnesia, 2 parts of antioxidant and lubricant are mixed and stirred for uniformly, wherein the preparation side of modified sisal fiber
It by sisal fiber Mechanical Crushing is 1cm that method, which is, is placed in pressure pan, and it is 150 to carry out temperature in explosion treatment, the tank of explosion treatment
DEG C, pressure is 5MPa in tank, keeps 10min, and pressure inside the tank release time is 0.01s, is soaked in mass fraction for 30% ammoniacal liquor
5h is steeped, is washed to neutrality, is placed in banbury and carries out internally mix, granulated after circulating water through pelleter, is dried, obtains high heat-resisting
The SBS composites that sisal fiber is modified.
Embodiment 6
A kind of high heat-resisting sisal fiber modified SBS composite, by weight, includes following component：70 parts of SBS, gathers
13 parts of propylene, modified 10 parts of sisal fiber, 15 parts of methyl methacrylate, 2 parts of ceramic fibre, 2 parts of nano magnesia is anti-oxidant
2 parts of agent, 0.5 part of lubricant, 0.05 part of zinc oxide, the preparation method of described high heat-resisting sisal fiber modified SBS composite,
Comprise the following steps：
1) 70 parts of SBS, 15 parts of methyl methacrylates are placed in autoclave with 0.05 part of zinc oxide, extract kettle
Interior air, injects carbon dioxide, and the pressure for making the carbon dioxide in kettle is 20MPa, and autoclave is placed in water bath, plus
Heat opens the radiation appliance that radiation source is cobalt -60, dose of radiation is 50kGy to 100 DEG C of reaction temperature, is 40r/min in rotating speed
Magnetic agitation under be warming up to reaction temperature, carry out reaction 4h, obtain grafting SBS；
2) grafting SBS is dissolved in hexamethylene, adds formic acid, 60 DEG C of constant temperature, speed of agitator be under conditions of 20r/min plus
Enter hydrogen peroxide, react 4h, reaction terminates, washing removes unreacted formic acid, hydrogen peroxide etc., drying obtains epoxidation and connect
Branch SBS；
3) by step 2) in epoxidation grafting SBS, 13 parts of polypropylene, modified 10 parts of sisal fiber, 2 parts of ceramic fibre,
2 parts of nano magnesia, phenyl-β-amine-resistant, three (2,4- di-tert-butyl-phenyl) phosphite esters are constituted with stearoylketene tannate
Mass ratio is 1:1:0.5 part of 2 parts of 0.5 antioxidant and lubricant, are mixed and stirred for uniformly, wherein the system of modified sisal fiber
It by sisal fiber Mechanical Crushing is 1cm that Preparation Method, which is, is placed in pressure pan, carries out temperature in explosion treatment, the tank of explosion treatment
For 150 DEG C, pressure is 5MPa in tank, keeps 10min, and pressure inside the tank release time is 0.01s, in the ammonia that mass fraction is 30%
Water soaks 5h, washs to neutrality, is placed in banbury and carries out internally mix, granulated after circulating water through pelleter, dries, and obtains high
The SBS composites that heat-resisting sisal fiber is modified.
Embodiment 7
A kind of high heat-resisting sisal fiber modified SBS composite, by weight, includes following component：70 parts of SBS, gathers
13 parts of propylene, modified 10 parts of sisal fiber, 15 parts of methyl methacrylate, 2 parts of ceramic fibre, 2 parts of nano magnesia is anti-oxidant
2 parts of agent, 0.5 part of lubricant, 0.01 part of zinc oxide, the preparation method of described high heat-resisting sisal fiber modified SBS composite,
Comprise the following steps：
1) 70 parts of SBS, 15 parts of methyl methacrylates are placed in autoclave with 0.01 part of zinc oxide, extract kettle
Interior air, injects carbon dioxide, and the pressure for making the carbon dioxide in kettle is 20MPa, and autoclave is placed in water bath, plus
Heat to the temperature of reaction is 100 DEG C, opens the radiation appliance that radiation source is cobalt -60, dose of radiation is 50kGy, is in rotating speed
Reaction temperature is warming up under 50r/min magnetic agitation, reaction 4h is carried out, grafting SBS is obtained；
2) grafting SBS is dissolved in hexamethylene, adds formic acid, 60 DEG C of constant temperature, speed of agitator be under conditions of 20r/min plus
Enter hydrogen peroxide, react 4h, reaction terminates, washing removes unreacted formic acid, hydrogen peroxide etc., drying obtains epoxidation and connect
Branch SBS；
3) by step 2) in epoxidation grafting SBS, 13 parts of polypropylene, modified 10 parts of sisal fiber, 2 parts of ceramic fibre,
2 parts of nano magnesia, phenyl-β-amine-resistant, three (2,4- di-tert-butyl-phenyl) phosphite esters are constituted with stearoylketene tannate
Mass ratio is 1:1:0.5 part of 2 parts of 0.5 antioxidant and zinc stearate lubricant, are mixed and stirred for uniformly, wherein modified sisal hemp
It by sisal fiber Mechanical Crushing is 1cm that the preparation method of fiber, which is, is placed in pressure pan, carries out explosion treatment, explosion treatment
Temperature is 150 DEG C in tank, and pressure is 5MPa in tank, keeps 10min, and pressure inside the tank release time is 0.01s, is in mass fraction
30% ammoniacal liquor immersion 5h, washs to neutrality, is placed in banbury and carries out internally mix, granulated after circulating water through pelleter, dry
It is dry, obtain the SBS composites that high heat-resisting sisal fiber is modified.
Embodiment 8
A kind of high heat-resisting sisal fiber modified SBS composite, by weight, includes following component：70 parts of SBS, gathers
13 parts of propylene, modified 10 parts of sisal fiber, 15 parts of methyl methacrylate, 2 parts of ceramic fibre, 2 parts of nano magnesia is anti-oxidant
2 parts of agent, 0.5 part of lubricant, 0.01 part of zinc oxide, the preparation method of described high heat-resisting sisal fiber modified SBS composite,
Comprise the following steps：
1) 70 parts of SBS, 15 parts of methyl methacrylates are placed in autoclave with 0.01 part of zinc oxide, extract kettle
Interior air, injects carbon dioxide, and the pressure for making the carbon dioxide in kettle is 20MPa, and autoclave is placed in water bath, plus
Heat to the temperature of reaction is 100 DEG C, opens the radiation appliance that radiation source is cobalt -60, dose of radiation is 50kGy, is in rotating speed
Reaction temperature is warming up under 350r/min magnetic agitation, reaction 4h is carried out, grafting SBS is obtained；
2) grafting SBS is dissolved in hexamethylene, adds formic acid, 60 DEG C of constant temperature, speed of agitator be under conditions of 20r/min plus
Enter hydrogen peroxide, react 4h, reaction terminates, washing removes unreacted formic acid, hydrogen peroxide etc., drying obtains epoxidation and connect
Branch SBS；
3) by step 2) in epoxidation grafting SBS, 13 parts of polypropylene, modified 10 parts of sisal fiber, 2 parts of ceramic fibre,
Particle diameter is 20~50nm 2 parts of nano magnesia, phenyl-β-amine-resistant, three (2,4- di-tert-butyl-phenyl) phosphite esters and hard ester
The mass ratio of acyl tannate composition is 1:1:0.5 part of 2 parts of 0.5 antioxidant and calcium stearate lubricant, are mixed and stirred for
Uniformly, wherein the preparation method of modified sisal fiber is by sisal fiber Mechanical Crushing to be 1cm, it is placed in pressure pan, is steamed
Temperature is 150 DEG C in gas explosion treatment, the tank of explosion treatment, and pressure is 5MPa in tank, 10min is kept, when pressure inside the tank discharges
Between be 0.01s, mass fraction for 30% ammoniacal liquor soak 5h, wash to neutrality, be placed in banbury and carry out internally mix, internally mix temperature
Spend for 250 DEG C, screw speed is 30r/min, the time is to be granulated through pelleter after 80min, circulating water, dries, obtains high
The SBS composites that heat-resisting sisal fiber is modified.
Each component internally mix in banbury after mixing, makes each component sufficiently merge mixing, makes to be modified sisal fiber
The hydroxyl on surface is grafted SBS epoxy reaction with epoxidation, so as to strengthen the intensity and impact property of SBS composites.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With it can be applied to various suitable the field of the invention completely, can be easily for those skilled in the art
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the embodiment with description.
Claims (8)
1. a kind of high heat-resisting sisal fiber modified SBS composite, it is characterised in that by weight, include following component：
50~70 parts of SBS, 6~13 parts of polypropylene, modified 5~10 parts of sisal fiber, 10~15 parts of methyl methacrylate, ceramics are fine
2~5 parts of dimension, 0.5~2 part of nano magnesia, 0.5~2 part of antioxidant, 0.5~1 part of lubricant, zinc oxide 0.01~0.05
Part, the preparation method of described high heat-resisting sisal fiber modified SBS composite comprises the following steps：
1) by 50~70 parts of SBS, 10~15 parts of methyl methacrylates and 0.01~0.05 part of zinc oxide, it is placed in reaction under high pressure
In kettle, air in kettle is extracted, carbon dioxide is injected, autoclave is placed in water bath, radiation appliance is opened, is stirred in magnetic force
Mix down and be warming up to reaction temperature, reacted, obtain grafting SBS；
2) grafting SBS is dissolved in hexamethylene, adds under organic acid, constant temperature, stirring condition and add hydrogen peroxide, reaction terminates,
Obtain epoxidation grafting SBS；
3) by step 2) in epoxidation grafting SBS, 6~13 parts of polypropylene, 5~10 parts of sisal fiber, 2~5 parts of ceramic fibre,
0.5~1 part of 0.5~2 part of nano magnesia, 0.5~2 part of antioxidant and lubricant are mixed and stirred for uniformly, being placed in banbury
Granulate, dry through pelleter after middle carry out internally mix, circulating water, obtain the SBS composites that high heat-resisting sisal fiber is modified.
2. the preparation method of high heat-resisting sisal fiber modified SBS composite according to claim 2, it is characterised in that
Step 1) in, the pressure of the carbon dioxide in kettle is 20~50MPa, and the temperature of reaction is 80~100 DEG C, the reaction time is 2~
4h, the radiation source of described radiation appliance is cobalt -60, and dose of radiation is 30~50kGy, and the rotating speed of magnetic agitation is 30~50r/
min。
3. the preparation method of high heat-resisting sisal fiber modified SBS composite according to claim 2, it is characterised in that
Step 2) in, described organic acid is formic acid or acetic acid, and the temperature of constant temperature is 40~70 DEG C, and speed of agitator is 20~30r/min,
Reaction time is 2~4h.
4. the preparation method of high heat-resisting sisal fiber modified SBS composite according to claim 2, it is characterised in that
The preparation method of described modification sisal fiber is：It is 1~3cm by sisal fiber Mechanical Crushing, is placed in pressure pan, carries out quick-fried
Tear is managed, and 3~5h is soaked in mass fraction is 20~30% ammoniacal liquor, and washing to neutrality obtains modified sisal fiber.
5. high heat-resisting sisal fiber modified SBS composite according to claim 4, it is characterised in that explosion treatment
In tank temperature be 150~200 DEG C, in tank pressure be 1~5MPa, keep 5~10min, pressure inside the tank release time be 0.01~
0.1s。
6. high heat-resisting sisal fiber modified SBS composite according to claim 1 or 2, it is characterised in that described is anti-
Oxidant is phenyl-β-amine-resistant, three (2,4- di-tert-butyl-phenyl) phosphite esters and stearoylketene tannate, is in mass ratio (1
~2):(1~2):(0.5~1) mixing composition.
7. high heat-resisting sisal fiber modified SBS composite according to claim 1 or 2, it is characterised in that described profit
Lubrication prescription is the one or more in zinc stearate, calcium stearate, silicone master batch, paraffin.
8. high heat-resisting sisal fiber modified SBS composite according to claim 1 or 2, it is characterised in that in banbury
Internally mix temperature be 250~280 DEG C, screw speed be 30~50r/min, the internally mix time be 60~80min.
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| CN108796660A (en) * | 2018-06-28 | 2018-11-13 | 巢湖市荷花渔网有限公司 | A kind of preparation method of TPE fishing lines |
| CN109233180A (en) * | 2018-09-03 | 2019-01-18 | 韶关市诚湃新能源科技有限公司 | A kind of the modified SBS composite-material formula and its preparation process of highly resistance folding |
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