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Method for improving thermoplastic plastics shaping manufacturability and capability

A thermoplastic and molding technology, applied in the field of materials, can solve problems such as molding process limitations, and achieve the effect of expanding the scope of application, improving performance, and improving molding processability

Inactive Publication Date: 2008-08-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, there have been a small number of research reports on the influence of reactive plasticizers on the molding process and properties of thermoplastic composites, but these studies are mainly achieved through the gradual polymerization of relatively viscous oligomers, and the molding process is limited to injection molding. molding
There is no relevant literature report on the application of the chain growth mechanism of monomers to improve the molding process and performance of thermoplastics and their composites.

Method used

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  • Method for improving thermoplastic plastics shaping manufacturability and capability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Firstly, weigh the photocurable cross-linking monomer (referred to as monomer), oligomer, photoinitiator and photosensitizer according to the metering, add thermoplastics after mixing evenly, and use twin-screw extruder to shape after mixing evenly. In terms of parts by weight, the ratio of each raw material is: 20 parts of monomers, 20 parts of oligomers, 4 parts of photoinitiators, 2 parts of photosensitizers, and 60 parts of thermoplastics.

[0025] The monomer in the above formula is ethoxylated trimethylolpropane triacrylate (EO 3 -TMPTA), the oligomer adopts bisphenol A epoxy diacrylate, the photoinitiator adopts the liquid triaryl hexafluorophosphate sulfonium salt mixed with single salt and double salt, and the photosensitizer adopts 2,3-dihydro-1 -Indanone, a thermoplastic made of polycarbonate pellets.

Embodiment 2

[0027] Except that each raw material proportioning has following change, other is with embodiment 1.

[0028] In parts by weight, the ratio of each raw material is: 10 parts of monomer, 10 parts of oligomer, 2 parts of photoinitiator, 1 part of photosensitizer, and 80 parts of thermoplastic.

Embodiment 3

[0030] In terms of parts by weight, the ratio of each raw material is: 20 parts of monomers, 20 parts of oligomers, 4 parts of photoinitiators, 2 parts of photosensitizers, and 60 parts of thermoplastics.

[0031] In this example, the monomer is trimethylolpropane trimethacrylate (TMPTMA), the oligomer is bisphenol A epoxy diacrylate, and the photoinitiator is liquid triaryl six The sulfonium fluorophosphate and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) have a mass ratio of 1:1, and polycarbonate pellets are used as thermoplastics. Others are with embodiment 1.

[0032] The obtained thermoplastic composite material of this example, its scanning electron microscope picture is as follows figure 1 As shown, where: the white area is the thermosetting particles formed by the polymerization of monomers and oligomers. It can be seen from the figure that the thermosetting is uniformly dispersed in the continuous phase polycarbonate matrix.

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Abstract

The invention relates to a method for improving thermoplastics forming manufacturability and property, in particular to that: a relatively small amount of light-cured crosslinking monomers, oligomers, photoinitiators and photosensitizers are utilized for being blended with a large amount of thermoplastics so as to lower the viscosity of a bending system to improve the forming manufacturability and the property of the thermoplastics and the composite materials; the thermoplastics and the composite materials are made by the following raw materials calculated by weight portion: thermoplastics: 60 to 95 portions; light-cured crosslinking monomers which are acrylic monomers: 5 to 20 portions; oligomers which are epoxy oligomers: 5 to 20 portions; photoinitiators: 1 to 4 portions and photosensitizers: 0.5 to 2 portions. The method for improving thermoplastics forming manufacturability and property can improve and increase the property of the thermoplastics and the composite materials, and the technology can lead the thermoplastics and the rotational mode products, composite materials products, powder coating and injection and extrusion products to have key breakthrough in property and application, which can promote the development of new composite materials.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for improving and enhancing the molding process and performance of thermoplastics and their composite materials by using photocurable crosslinkable monomers and the like. Background technique [0002] Many thermoplastic polymers have many excellent properties such as high temperature resistance, strength, stiffness and toughness. However, due to the rigidity of its main chain structure, its melt viscosity is very high, making it difficult to form and process, and it may also degrade under high temperature forming conditions. This characteristic leads to many difficulties in extrusion molding, injection molding, rotational molding, powder coating and its composite molding. For a long time, in order to reduce the molding viscosity, people have tried to reduce the molecular weight of thermoplastics, broaden the molecular weight distribution, add internal plasticizers (such as low ...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L77/10C08L61/16C08L23/12C08L23/06C08L27/06C08J3/24C08J3/28C08J5/00C09D5/03C09D169/00C09D177/10C09D161/16C09D123/12C09D123/06C09D127/06C08L33/04
Inventor 梅启林徐莎黄志雄秦岩袁露王雁冰
Owner WUHAN UNIV OF TECH
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