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Blending thermoplastic elastomer with low glass transition temperature and high breaking elongation and preparation method thereof

A thermoplastic elastomer and transition temperature technology, which is applied in the field of blended thermoplastic elastomers with low glass transition temperature and high elongation at break and their preparation, can solve the problem of not finding the advantages of blended elastomers, affecting materials Processing and performance problems, to achieve the effect of convenient ratio change, short preparation time and good elasticity

Inactive Publication Date: 2012-12-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many patents and documents on the preparation of pure polyamide thermoplastic elastomers and polyester thermoplastic elastomers. Most of them are prepared by continuous polymerization and esterification, and some are prepared by screw extrusion. However, due to the adopted methods and Due to the limitations of the process, the phase separation of the obtained blended thermoplastic elastomer is inevitable, which seriously affects the processing and performance of the material, and the advantages of the blended elastomer have not been better discovered, and the polyamide and polyester Thermoplastic Elastomer Blending to Prepare High Performance Thermoplastics

Method used

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  • Blending thermoplastic elastomer with low glass transition temperature and high breaking elongation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 20 parts of polyamide 66, 80 parts of polyester thermoplastic elastomer (prepared by copolymerization of 70% polytetracyanofuran + 30% polyethylene terephthalate, molecular weight 15000) mixture under 50 ~ 100Pa (a) high vacuum condition Heat to 100-115°C and dry for 10-12 hours, extrude the prepared sample at 235°C through the screw to pelletize, then dry at 100-115°C for one hour, and then extrude the prepared sample at 235°C to pelletize. A blended thermoplastic elastomer with a breaking strength of 60Mpa, a breaking elongation of 665%, a Tg of -55°C, and a Shore hardness of 40D.

Embodiment 2

[0033] Mix 40 parts of polyamide 66, 55 parts of polyester thermoplastic elastomer (prepared by copolymerization of 75% polytetracyanofuran + 25% polyethylene terephthalate, molecular weight 15000) and 1 part of antioxidant TAD mixture at 50-100Pa (a) Heating to 100-115°C under high vacuum conditions and drying for 10-12 hours, then adding 4 parts of 4'4-diphenyltetraxane diisocyanate to the mixture and mixing evenly again, and the prepared sample was heated at 245°C Extruded through the screw to pelletize, then dried at 100-115°C for an hour, and extruded again at 245°C to pelletize, the breaking strength is 70Mpa, the elongation at break is 670%, the Tg is -58°C, and the Shore hardness 45D blended thermoplastic elastomer.

Embodiment 3

[0035] Mix 15 parts of polyamide 10, 70 parts of polyester thermoplastic elastomer (60% polytetracyanofuran + 40% polybutylene terephthalate, molecular weight 18000) and 5 parts of antioxidant SEED mixture at 50-100Pa (a) Heating to 100-115°C under high vacuum conditions and drying for 10-12 hours, then adding 10 parts of toluene diisocyanate to the mixture and mixing evenly again, extruding the prepared sample at 235°C through a screw before pelletizing, Then dry at 100-115°C for an hour, and extrude and pelletize again at 255°C to obtain a blended thermoplastic elastomer with a breaking strength of 70 MPa, an elongation at break of 760%, a Tg of -50°C, and a Shore hardness of 50D.

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Abstract

The invention relates to a blending thermoplastic elastomer with low glass transition temperature and high breaking elongation and a preparation method thereof. The blending thermoplastic elastomer consists of a thermoplastic polyester elastomer, a polyamide thermoplastic elastomer, a condensation polymer of the elastomer, polyamide and polyester, wherein the condensation polymer is produced by performing ester condensation polymerization on a terminal hydroxyl group of the thermoplastic polyester elastomer and a terminal carboxyl group of the polyamide. The preparation method of the blending thermoplastic elastomer with low glass transition temperature and high breaking elongation comprises the following steps of: heating the mixture of 10-90 parts of polyamide, 10-75 parts of thermoplastic polyester elastomer and 0-5 parts of antioxidant to the temperature of 50-150 DEG C under a high vacuum condition with the pressure of 50-500Pa; drying for 10-12 hours; adding 0-10 parts of diisocyanate into the mixture and uniformly mixing again; granulating the prepared materials at the temperature of 185-255 DEG C through a screw extruder; drying at the temperature of 50-150 DEG C for 2-3 hours; and granulating the dried materials at the temperature of 185-255 DEG C through the screw extruder so as to obtain the blending thermoplastic elastomer with low glass transition temperature and high breaking elongation.

Description

technical field [0001] The invention relates to a blended thermoplastic elastomer with low glass transition temperature and high elongation at break and a preparation method thereof, in particular to a blended thermoplastic elastomer with low glass transition temperature and high elongation at break and its preparation method. The preparation method, in particular, relates to a process for preparing complex blended thermoplastic elastomers through screw extrusion by transesterification, ester polycondensation and crosslinking under the action of diisocyanate between polyamide and polyester thermoplastic elastomers . Background technique [0002] Polyamide thermoplastic elastomer is a kind of thermoplastic elastomer with excellent performance and wide application. The molecular chain is composed of hard segments composed of polyamides and soft segments composed of polyethers. Polyamide thermoplastic elastomer has strong rigidity and toughness. Although the prepared thermopl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L77/06C08L77/02C08L77/00C08K5/3435C08K5/29
Inventor 易春旺彭治汉李敏王华平王朝生黄烈迁
Owner DONGHUA UNIV