Preparation of novel all acrylate block thermoplastic elastomer

A thermoplastic elastomer, acrylate technology, applied in the field of preparation of full acrylate block thermoplastic elastomer, can solve the problems of insufficient stability, flexibility, oil resistance, etc., and achieve excellent physical properties, stable product performance, high The effect of tensile strength

Inactive Publication Date: 2018-05-01
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A disadvantage of the thermoplastic elastomer compositions described above is that they generally have insufficient stability at high temperatures and often have insufficient low temperature flexibility, oil resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Add 20g of lauryl methacrylate, 0.2g of chain transfer agent isobutyronitrile dithiobenzoate, 20g of solvent tetrahydrofuran and 0.03g of initiator AIBN in the reactor, carry out polymerization reaction under nitrogen atmosphere, 70 ℃ After reacting for 12 hours, the obtained polymer was precipitated and dried several times to obtain polymer A;

[0023] (2) Add 15g of polymer A, 15g of solvent tetrahydrofuran, 0.02g of initiator AIBN and 20g of tetrahydrofurfuryl methacrylate into the reactor, and carry out polymerization reaction under nitrogen atmosphere. After reacting at 70°C for 8h, the obtained polymerization The product was precipitated and dried several times to obtain block copolymer B;

[0024] (3) After dissolving the obtained block copolymer B in dichloromethane, the reaction solution was poured into a mold and dried to obtain a novel all-acrylate block thermoplastic elastomer.

Embodiment 2

[0026] (1) Add 20g of lauryl methacrylate, 0.4g of chain transfer agent isobutyronitrile dithiobenzoate, 20g of solvent tetrahydrofuran and 0.02g of initiator AIBN in the reactor, carry out polymerization reaction under nitrogen atmosphere, 80 ℃ After reacting for 6 hours, the obtained polymer was precipitated and dried several times to obtain polymer A;

[0027] (2) Add 15g of polymer A, 15g of solvent tetrahydrofuran, 0.03g of initiator AIBN and 20g of tetrahydrofurfuryl methacrylate into the reactor, and carry out polymerization reaction under nitrogen atmosphere. After reacting at 80°C for 6h, the obtained polymerization The product was precipitated and dried several times to obtain block copolymer B;

[0028] (3) After dissolving the obtained block copolymer B in dichloromethane, the reaction solution was poured into a mold and dried to obtain a novel all-acrylate block thermoplastic elastomer.

Embodiment 3

[0030] (1) Add lauryl methacrylate 20g, chain transfer agent 2-(dodecyl trithiocarbonate group)-2-methylpropionic acid 0.2g, solvent tetrahydrofuran 20g and initiator AIBN 0.04 in the reactor g, carry out the polymerization reaction under a nitrogen environment, after reacting at 65°C for 12 hours, the obtained polymer is precipitated and dried several times to obtain Polymer A;

[0031] (2) Add 15g of polymer A, 15g of solvent tetrahydrofuran, 0.02g of initiator AIBN and 20g of tetrahydrofurfuryl methacrylate into the reactor, and carry out polymerization reaction under nitrogen atmosphere. After reacting at 65°C for 12h, the obtained polymerization The product was precipitated and dried several times to obtain block copolymer B;

[0032] (3) After dissolving the obtained block copolymer B in dichloromethane, the reaction solution was poured into a mold and dried to obtain a novel all-acrylate block thermoplastic elastomer.

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Abstract

The invention provides a novel all acrylate block thermoplastic elastomer, comprising a rubber phase and a hard phase. The novel all acrylate block thermoplastic elastomer is characterized in that therubber phase is provided by a copolymer composed of lauryl methacrylate (LMA) and the hard phase is provided by a copolymer of tetrahydrofurfuryl methacrylate (THFMA). The thermoplastic elastomer isprepared through reversible addition-fragmentation chain transfer polymerization (RAFT) of lauryl methacrylate and tetrahydrofurfuryl methacrylate. A weight ratio of the rubber phase to the hard phaseis 20: 80 to 60: 40. According to the invention, the thermoplastic elastomer with controllable mechanical properties can be prepared by adjusting the contents of lauryl methacrylate and tetrahydrofurfuryl methacrylate in the thermoplastic elastomer so as to adapt to demands of different application fields. The novel all acrylate block thermoplastic elastomer provided by the invention has excellent temperature stability in a temperature range of -10 to 70 DEG C, excellent oil resistance and especially high elongation at break, and is applicable to members prepared through injection molding, extrusion and blow molding.

Description

technical field [0001] The invention relates to the technical field of organic polymers, in particular to the preparation of a full acrylate block thermoplastic elastomer. Background technique [0002] Acrylic thermoplastic elastomer refers to a new type of TPE that contains at least one flexible acrylate segment or uses polyacrylate as the elastic phase, and can be processed by thermoplastic. Because acrylate is a flexible chain segment, its main chain is a saturated structure, and its side groups are polar ester groups, so it is elastic, heat-resistant, ozonation-resistant, oil-resistant, and does not produce smoke and gas when burning. Irritant gas and other properties. [0003] The thermoplastic elastomer includes a rubber phase and a hard phase, the rubber phase with a low glass transition temperature is used as a continuous phase, and the hard phase with a high glass transition temperature is dispersed in the rubber phase to act as a crosslinking point. In order to o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00
CPCC08F293/00
Inventor 王春鹏郭腾飞储富祥
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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