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Thermoplastic nylon elastomer containing pyrrolidone structure amorphous nylon segment and its preparation method and application

A nylon elastomer and pyrrolidone technology is applied in the field of thermoplastic nylon elastomer and its preparation, which can solve the problems of endangering the life safety of operators, difficulty in reaction operation, and high post-processing cost, and achieves wide application range and excellent thermal stability. , the effect of fewer steps

Active Publication Date: 2022-02-18
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the isocyanate method needs to use highly toxic isocyanate, which not only seriously endangers the life safety of operators, but also causes serious harm to the environment; moreover, isocyanate has high activity, is easy to react with water and self-crosslinking reaction occurs easily, making the reaction The operation is difficult, and the water content in the reaction is high; at the same time, this method often needs to use a large amount of solvents. The use of solvents not only results in high post-processing costs, but also causes serious harm to the environment.

Method used

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  • Thermoplastic nylon elastomer containing pyrrolidone structure amorphous nylon segment and its preparation method and application
  • Thermoplastic nylon elastomer containing pyrrolidone structure amorphous nylon segment and its preparation method and application
  • Thermoplastic nylon elastomer containing pyrrolidone structure amorphous nylon segment and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0048] 56.58g of caprolactam, 30.24g of nylon salt formed by the equimolar reaction of itaconic acid and decyl diamine and 2.42g of hydroquinone / sodium hypophosphite aqueous solution with a mass fraction of 2.0% were added to the polymerization vessel, and successively Raise the temperature to 200°C for 1 hour, 220°C for 4 hours, 240°C and vacuum to below 2000Pa for 2.5 hours.

[0049] The intrinsic viscosity [η] of the thermoplastic nylon elastomer is 1.35dL / g, the elongation at break and the tensile strength are 374% and 31.78MPa, respectively, the light transmittance is 73.7%, and the water absorption rate is 7.58%.

Embodiment 2

[0051] Add 45.26g of caprolactam, 30.24g of itaconic acid and the nylon salt formed by the equimolar reaction of decyl diamine and 2.42g of hydroquinone / sodium hypophosphite aqueous solution with a mass fraction of 2.0% into the polymerization vessel, and sequentially Raise the temperature to 200°C for 1 hour, 220°C for 3 hours, 240°C and vacuum to below 2000Pa for 2.5 hours.

[0052] The intrinsic viscosity [η] of the thermoplastic nylon elastomer is 1.3dL / g, the elongation at break and the tensile strength are 544% and 26.39MPa, respectively, the light transmittance is 75.9%, and the water absorption is 6.01%.

Embodiment 3

[0054] Add 22.63g of caprolactam, 60.48g of itaconic acid and nylon salt formed by the equimolar reaction of decyl diamine and 3.02g of hydroquinone / sodium hypophosphite aqueous solution with a mass fraction of 2.0% into the polymerization vessel, and sequentially Raise the temperature to 200°C for 1 hour, 215°C for 5 hours, 225°C and vacuum to below 2000Pa for 1 hour.

[0055] The intrinsic viscosity [η] of the thermoplastic nylon elastomer is 1.72dL / g, the elongation at break and the tensile strength are 764% and 11.27MPa, respectively, the light transmittance is 80.0%, and the water absorption is 8.24%.

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Abstract

The invention discloses a prepolymer containing a pyrrolidone structure amorphous nylon segment, a thermoplastic nylon elastomer prepared therefrom and their preparation method and application. The nylon elastomer is composed of a crystalline nylon segment monomer and an amorphous pyrrolidone structure Nylon segment monomers, or prepolymers prepared from crystalline nylon segment monomers and prepolymers prepared from pyrrolidone-containing amorphous nylon segment monomers are obtained by melt copolymerization. Because the nylon elastomer contains a soft-segment pyrrolidone structure, it not only has greatly improved thermal stability, but also has better water resistance and relatively low moisture absorption. It also has multiple functional properties such as shape memory, room temperature self-repair, and damping. It can be used to prepare cable sheath materials, anti-counterfeiting materials, sound insulation and shock absorption materials, medical materials, intelligent response materials, food packaging materials, adhesive materials, sports materials, self-healing materials or functional modified fillers.

Description

technical field [0001] The invention belongs to the technical field of thermoplastic elastomer and its preparation and application, and in particular relates to a thermoplastic nylon elastomer containing pyrrolidone structure amorphous nylon segment and its preparation method and application. Background technique [0002] Thermoplastic Nylon Elastomer (Thermoplastic Polyamide Elastomer, TPAE) is a kind of polymer material with dual characteristics of rubber and plastic. Compared with the widely used polystyrene thermoplastic elastomer (SBC), polyolefin elastomer (TPO ), polyurethane thermoplastic elastomer (TPU) and polyester thermoplastic elastomer (TPEE), etc. TPAE is a new member of the thermoplastic elastomer family, and its preparation and application started relatively late. TPAE was first successfully developed and commercialized by the German Hughes Company in 1979. Later, due to its many excellent properties, it has been valued by enterprises and successively develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/36C08G69/26C08G69/28
CPCC08G69/36C08G69/265C08G69/28C08G2280/00
Inventor 王玉忠卢鹏赵泽永陈思维赵盼盼邓聪
Owner SICHUAN UNIV
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