Optically transparent polymethyl methacrylate/polycarbonate composite and preparation method thereof

A technology of polymethyl methacrylate and polycarbonate, applied in the field of polymethyl methacrylate/polycarbonate composites and its preparation, can solve the problems of lack of compatibility, PC and PMMA incompatibility, refractive index Differences and other issues, to achieve the effect of improving light transmission performance, improving transparency performance, and adding a small amount

Active Publication Date: 2019-09-10
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prepared PMMA / PC blends are problematic, as PC and PMMA are known to be incompatible, we believe this is due to the difference in refractive index between PC and PMMA and the lack of compatibility between the two caused by

Method used

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  • Optically transparent polymethyl methacrylate/polycarbonate composite and preparation method thereof
  • Optically transparent polymethyl methacrylate/polycarbonate composite and preparation method thereof
  • Optically transparent polymethyl methacrylate/polycarbonate composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]Step (1). Dry polymethyl methacrylate and polycarbonate in vacuum at 80-120°C for 24 hours respectively (Li-TFSI does not need to be dried);

[0046] Step (2). Add 54g of dried polymethyl methacrylate, 6g of dried polycarbonate and 0.225g of Li-TFSI into the internal mixer, melt and blend at 250°C at 50rpm / min Melt and knead for 10 minutes.

[0047] Step (3). The mixture is discharged from the melting and kneading equipment and lowered to normal temperature to obtain a polymethyl methacrylate / polycarbonate composite material.

[0048] The mass ratio of polymethyl methacrylate, polycarbonate and Li-TFSI in the polymethyl methacrylate / polycarbonate composite material prepared in Example 1 was 90:10:0.375.

Embodiment 2

[0050] Step (1). Dry polymethyl methacrylate and polycarbonate in vacuum at 80-120°C for 24 hours respectively (Li-TFSI does not need to be dried);

[0051] Step (2). Add 48g of dried polymethyl methacrylate, 12g of dried polycarbonate and 0.45g of Li-TFSI into the internal mixer, melt and blend at 250°C, at 50rpm / min Melt and knead for 10 minutes.

[0052] Step (3). The mixture is discharged from the melting and kneading equipment and lowered to normal temperature to obtain a polymethyl methacrylate / polycarbonate composite material.

[0053] The mass ratio of polymethyl methacrylate, polycarbonate and Li-TFSI in the polymethyl methacrylate / polycarbonate composite material prepared in Example 2 was 80:20:0.75.

Embodiment 3

[0055] Step (1). Vacuum dry polycarbonate and polymethyl methacrylate at 80-120°C for 24 hours respectively (Li-TFSI does not need to be dried);

[0056] Step (2). Add 42g of dried polymethyl methacrylate, 18g of dried polycarbonate and 0.45gLi-TFSI into the internal mixer, and melt and blend at 230~260°C. The rotor speed is 45-75rpm, and the melt kneading is 10-25min.

[0057] Step (3). The blend is discharged from the internal mixer and lowered to normal temperature to obtain a compound with high light transmission.

[0058] The mass ratio of polymethyl methacrylate, polycarbonate and lithium salt in the polymer composite prepared in Example 3 was 70:30:0.75.

[0059] The materials prepared in Comparative Examples 1-3 and Examples 1-3 were subjected to a transmittance-haze test, and the test conditions were: the samples were pressed into 0.3 mm thin sheets.

[0060] The materials prepared in Comparative Examples 1-3 and Examples 1-3 were subjected to a refractive index tes...

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Abstract

The invention discloses an optically transparent polymethyl methacrylate/polycarbonate composite and a preparation method thereof. The material is a blend of polymethyl methacrylate, polycarbonate andan organic salt with a metal as a cation, and the mass ratio is 60-90:40-10:0.2-3. By adding the organic salt with the metal as the cation, compatibility between the polymethyl methacrylate and the polycarbonate is greatly improved, light transmission performance of the material is greatly improved, light transmittance of the material is 90% or more, the haze is 10% or less, the refractive indexis 1.49 or more, and the material is optically transparent.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to an optically transparent polymethyl methacrylate / polycarbonate blend and a preparation method thereof, in particular to a compatibilization of polymethyl methacrylate and polycarbonate by organic salts. Carbonate obtains optically transparent polymethyl methacrylate / polycarbonate composite and preparation method thereof Background technique [0002] Polymethyl methacrylate (PMMA for short, plexiglass) is an important thermoplastic that was developed earlier. In 1927, chemists from the Rohm-Haas company in Germany passed methyl methacrylate between two glass plates. The ester is heated, and the methyl methacrylate undergoes a polymerization reaction, and polymethyl methacrylate with high transparency and good performance is obtained. In 1931, the company built a factory to produce PMMA, which was first applied in the aircraft industry and replaced celluloid plastic for ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L69/00C08K5/435
CPCC08L33/12C08L2201/10C08L69/00C08K5/435
Inventor 李勇进陈星汝
Owner HANGZHOU NORMAL UNIVERSITY
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