Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of optically transparent polymethyl methacrylate/polycarbonate compound and preparation method thereof

A polymethyl methacrylate, polycarbonate technology, applied in the field of polymethyl methacrylate/polycarbonate composite and its preparation, can solve the problem 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: 2021-02-02
HANGZHOU NORMAL UNIVERSITY
View PDF1 Cites 0 Cited by
  • 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

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of optically transparent polymethyl methacrylate/polycarbonate compound and preparation method thereof
  • A kind of optically transparent polymethyl methacrylate/polycarbonate compound and preparation method thereof
  • A kind of optically transparent polymethyl methacrylate/polycarbonate compound 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...

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
Login to View More

PUM

PropertyMeasurementUnit
transmittivityaaaaaaaaaa
transmittivityaaaaaaaaaa
hazeaaaaaaaaaa
Login to View More

Abstract

The invention discloses an optically transparent polymethyl methacrylate / polycarbonate composite and a preparation method thereof. The material of the invention is a blend of polymethyl methacrylate, polycarbonate and an organic salt whose cation is a metal. The mass ratio is 60-90:40-10:0.2-3. In the present invention, adding the metal organic salt as the cation greatly improves the compatibility between polymethyl methacrylate and polycarbonate, greatly improves the light transmittance of the material, and makes the light transmittance of the material greater than 90%. , the haze is less than 10%, the refractive index is greater than 1.49, 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

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/12C08L69/00C08K5/435
CPCC08L33/12C08L2201/10C08L69/00C08K5/435
Inventor 李勇进陈星汝
Owner HANGZHOU NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com