Method for producing polyamide thermoplastic elastomer
A thermoplastic elastomer and production method technology, applied in the field of block copolymer thermoplastic elastomers, can solve the problems of high toxicity, toxicity, health of operators and the impact of surrounding environment, etc., achieve high molecular weight, improve impact performance, and speed fast effect
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Embodiment 1
[0036] Add 1000g of end-group-aminated poly-14-butanediol with a number-average molecular weight of 2000 into a 5L polymerization kettle, heat it to melt, heat the amino-terminated polyether to 180°C, and stir at a speed of 50r / min Add 10g of catalyst NaOH at the same time, after the catalyst and amino-terminated polyether have fully reacted, add molten caprolactam of 2000g at a stirring speed of 300r / min, gradually raise the temperature to 240°C and stabilize for 3 hours after the addition, keep the temperature and continue the reaction under reduced pressure for 1 After one hour, the small molecular product produced in the reaction and a small amount of unreacted caprolactam monomer were taken out, extracted with boiling water, and dried to obtain a polyamide thermoplastic elastomer with a soft segment content of 33%, a tensile strength of 30.5MPa, and an elongation at break of 380%. Shore hardness 52D.
Embodiment 2
[0038] Add 300g of end-group-aminated polyethylene glycol with a number-average molecular weight of 500 into a 5L polymerization kettle, heat it to melt, heat the amino-terminated polyether to 140°C, and add it under stirring at a speed of 100r / min. Catalyst NaNH 2 About 3g, after the catalyst and the amino-terminated polyether fully react, add molten 3000g laurolactam under stirring at a speed of 500r / min. After one hour, the small molecule products produced in the reaction and a small amount of unreacted caprolactam monomer were extracted, extracted with boiling water and dried to obtain a polyamide thermoplastic elastomer with a soft segment content of 10%. The measured number average molecular weight was about 24000 and the tensile strength was 40.3MPa , Elongation at break 230%, Shore hardness 70D.
Embodiment 3
[0040]Add 2000g of end-group-aminated poly-1,6-hexanediol with a number-average molecular weight of 5000 into a 5L polymerization kettle, heat it to melt, and heat the amino-terminated polyether to 180°C, 200r / min Add about 2g of catalyst NaH under stirring at a speed of 1000r / min. After the catalyst and the amino-terminated polyether fully react, add 1000g of molten undecalactam under stirring at a speed of 800r / min. Continue the reaction for 1 hour under reduced temperature and pressure, extract the small molecule products produced in the reaction and a small amount of unreacted caprolactam monomer, extract with boiling water, and obtain a polyamide thermoplastic elastomer with a soft segment content of 60% after drying, with a tensile strength of 10.3MPa , Elongation at break 670%, Shore hardness 25D.
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