Preparation method for polymethyl methacrylate resin with high heat resistance

A polymethyl methacrylate, high heat resistance technology, applied in the field of polymer material preparation, can solve the problems of complex post-treatment process, toxic product properties of solvents, etc., and achieve shortened polymerization reaction time, good performance, and excellent heat resistance. and thermal stability
CN104650286AActive Publication Date: 2015-05-27CHANGCHUN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHANGCHUN UNIV OF TECH
Publication Date
2015-05-27

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Abstract

The invention provides a preparation method for polymethyl methacrylate resin with high heat resistance, and belongs to the field of high polymer material preparation methods. The preparation method is used for solving the problems that an existing preparation method for the polymethyl methacrylate resin is complex in post-treatment process, the solvent is toxic and the product performances are poor. According to the preparation method disclosed by the invention, continuous solution polymerization is adopted, alcohol is taken as a solvent, monomer with reactive hydrogen and methyl methacrylate are polymerized into binary copolymer at a high temperature, and a purpose of improving the heat resistance of the polymethyl methacrylate resin is improved by controlling a ratio of charge and a polymerization temperature of the polymethyl methacrylate monomer and the acrylamide monomer. According to the experimental results, the glass transition temperature Tg of the polymethyl methacrylate resin prepared by the preparation method can reach 173 DEG C, the thermal degradation initial temperature is over 301 DEG C, the obvious thermal degradation temperature is up to 401 DEG C and the molecular weight distribution is about 1.5.
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Description

technical field

[0001] The invention belongs to the field of preparation methods of polymer materials, and in particular relates to a preparation method of high heat-resistant polymethyl methacrylate resin. Background technique

[0002] Polymethyl methacrylate (PMMA), an acrylic polymer, has many excellent properties, such as: high light transmission, light weight, easy processing, dimensional stability, weather resistance, electrical insulation Good, and not easy to color, etc.; therefore, widely used in aviation, construction, decoration, optical instruments and other fields. However, the glass transition temperature of radically polymerized PMMA is low, only 105°C, and thermal degradation usually starts at 150°C. This makes the polymer not only susceptible to thermal degradation during production and processing, but also easily deformed during use, which seriously limits its application range. Usually, a ring structure is introduced into the main chain and side chain of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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