Thermal synthetic preparation method of SEBS-PLA branched copolymer solvent

A graft copolymer and solvothermal technology, applied in the field of polymer science, can solve the problems of complex reaction equipment, uneven reaction, large amount of solvent, etc., and achieve simple reaction equipment, less solvent amount, and high grafting rate Effect

Inactive Publication Date: 2008-07-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above studies mostly use melt grafting reaction and solution grafting reaction, the amount of solution grafting solvent is large, and the reaction device is complicated; and melt grafting, the reaction is simple, but the reactants are difficult to fully mix well, the reaction is not uniform, and the grafting The rate is also low, and it is easy to crosslink (Ye Qiang, Zhou Tao, Xu Jianbo, Zhang Aimin, Polymer Materials Science and Engineering, 21(5), 220-223)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Put 5ml of chloroform in the autoclave, add 20g SEBS resin, 1gPLA, 200mgAIBN and 3mg antioxidant 1330, tighten the lid of the autoclave and put it in an oven at 80°C for 36 hours, then cool it with water, open the autoclave, and The solution was poured into 250ml of methanol, stirred on a magnetic stirrer (rotating speed 240 rpm) for 2 hours to remove unreacted substances, then suction filtered, and the powder obtained by suction filtration was dried in a vacuum oven at 50°C for 48 hours , that is, to obtain a PLA content of 0.7wt% SEBS-PLA graft copolymer.

Embodiment 2

[0018] Put 50ml of toluene in the autoclave, add 2.5g of SEBS resin, 2g of PLA, 0.8g of DCP, 1g of maleic anhydride, 5mg of antioxidant 168 and 20mg of antioxidant 1098, tighten the lid of the autoclave and put it in an oven at 160°C. Stand for 8 hours, then cool with water, open the autoclave, solution is poured in the ethylene glycol of 300ml, stir (rotating speed 900 revs / min) 0.5 hour on magnetic stirrer, to remove unreacted substance, then suction filtration, The powder obtained by suction filtration was dried in a vacuum oven at 100°C for 5 hours to obtain a SEBS-PLA graft copolymer with a PLA content of 8 wt%.

Embodiment 3

[0020] Put 50ml of tetrahydrofuran in the autoclave, add 1gSEBS resin, 9gPLA, 300mg TBHP, 4ml acrylamide, 10mgDLTP and 10mg antioxidant 1076, tighten the lid of the autoclave and put it in an oven at 200°C for 3 hours, then water Cooling, open autoclave, solution is poured in the acetone of 100ml, stir (rotating speed 200 revs / min) on magnetic stirrer 5 hours, to remove unreacted substance, then suction filtration, the powder that suction filtration obtains is in 80 °C in a vacuum oven for 24 hours to obtain a SEBS-PLA graft copolymer with a PLA content of 95.0 wt%.

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PUM

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Abstract

The invention relates to a preparation method for SEBS-PLA graft copolymer using the method of solvent thermal synthesis, the block copolymer SEBS of styrene-ethylene-butadiene-styrene, the lactic acid PLA, the initiator, the comonomer and the antioxidant are added into an autoclave, and dissolve in a good solvent of SEBS or PLA, the SEBS can be fully contact with the PLA, initiator by controlling the temperature and time. When the reaction is completed, after drying and cleaning, the SEBS-PLA graft copolymer can be got. The SEBS-PLA can be used to as compatilizer of SEBS and PLA or other blended polymer, emulsifier of other reaction systems, dispersing agent, cosolvent, medical coating material, coloring agent of SEBS and other members.

Description

technical field [0001] The present invention relates to a kind of method for preparing styrene-ethylene-butadiene-styrene block copolymer (SEBS)-polylactic acid (PLA) graft copolymer (SEBS-PLA), relate in particular to a kind of in autoclave A new method for the preparation of SEBS-PLA copolymers with new functions by solvothermal synthesis. This invention is in the field of polymer science. Background technique [0002] Styrene-ethylene-butadiene-styrene block copolymer (SEBS) is a new type of multipurpose thermoplastic elastomer, which is the rubber in the molecule of thermoplastic block copolymer styrene-butadiene-styrene (SBS) A new type of modified elastomer prepared by selective hydrogenation of polybutadiene unsaturated double bonds. SEBS not only has excellent aging resistance, but also has good mechanical properties. The elongation at break is 0-150%, which exceeds that of vulcanized rubber. It not only has good resistance to ozone, ultraviolet rays, and electric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02
Inventor 戚嵘嵘骆梦妮王艳玲
Owner SHANGHAI JIAO TONG UNIV
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