TPX-based light high-strength microporous foam material and preparation method thereof

Abstract

The invention provides a TPX-based light high-strength microporous foam material and a preparation method thereof, and belongs to the technical field of foam material preparation, wherein the pore diameter of the foam pores of the material is 0.3-30 [mu]m, and the foam pores are uniformly distributed, so that the material has the advantages of light weight and high strength. The preparation methodcomprises the following steps: (1) heating and melting TPX, and carrying out compression molding under a pressure of 30-60 MPa to obtain a TPX polymer sheet; and (2) putting the TPX polymer sheet into a high-pressure reaction kettle, saturating for a certain time under the conditions of high temperature and high pressure, then rapidly relieving pressure, and quenching to room temperature to obtain the TPX-based light-weight high-strength microporous foam material. According to the invention, the preparation method is simple in process, easy to operate and good in designability; and the prepared TPX-based light high-strength microporous foam material is small in pore diameter, low in density and high in mechanical property and can be widely applied to the fields of medical instruments, electronic appliances, packaging materials, film materials and the like which require light weight and high strength.

Description

technical field [0001] The invention belongs to the technical field of foam material preparation, in particular to a TPX-based lightweight high-strength microcellular foam material and a preparation method thereof. Background technique [0002] Poly-4-methyl-1-pentene (TPX) is a new type of thermoplastic material developed in recent years. Due to its high temperature resistance, clarity, high melting point, chemical resistance, acid resistance, alcohol resistance, impact resistance and other advantages, It has been widely used in the manufacture of medical equipment (such as syringes), physical and chemical laboratory equipment, special food utensils for electronic furnaces, baking trays, release paper, and heat-resistant wire coatings. Its appearance is a colorless transparent granular solid with a density of 0.83g / cm 3 , is the thermoplastic resin with the smallest density at present, and is an ideal matrix for preparing lightweight and high-strength foam materials. In a...

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Problems solved by technology

[0003] Fang Yu et al. (Fang Yu, Luo Xuan, Zhang Qingjun. Forming control of low-density PMP polymer foam[J]. Intense Laser and Particle Beam, 2013,25(11):2873-2876.) used the induced phase inversion method to combine in-situ The method of molding prepares low-density TPX polymer foam, but the mixed system of durene / naphthalene used to dissolve poly-4-methyl-1-pentene (TPX) in the preparation process is not only toxic, harmful to human body, but also flammable Explosive, there are potential safety hazards, and the preparation process is relatively complicated, and there are many factors that need to be controlled

Shan Wenwen et al. (Shan Wenwen, Zhang Lin, Xu Jiajing, Xu Jiayun, Yang Xiangdong.[J]. Intense Laser and Particle Beam, 2008, 20(12):2037-2040.) successfully obtained density by using binary solvent system Uniformly distributed low-density TPX foam samples, and because the pore size of the ultra-low-density TPX foam samples in the binary solvent system is too large, very few large pores can reach hundreds of μm, and the uniformity is extremely low, resulting in poor mechanical properties

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