New thermosetting poly(copper phthalocyanine) imide polymers with good toughness, superior thermal stability, chemical inertness, and fire resistance characteristics have been prepared. The studies of polymerization of two bisphthalonitriles were made using metal powder or metallic salt. Infrared, d
Study on the synthesis of heat-resistant PMMA
โ Scribed by Dong Shaosheng; Wei Yuezhen; Zhang Zhiqian
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 112 KB
- Volume
- 72
- Category
- Article
- ISSN
- 0021-8995
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โฆ Synopsis
N-cyclohexylmaleimide (CHMI) and styrene (St) were used to copolymerize with methyl methacrylate (MMA) to synthesize heat-resistant poly(methyl methacrylate) (PMMA) by a solution copolymerization method and a suspension copolymerization method. Residual CHMI concentrations in the copolymers were analyzed by gas chromatography. Effects of styrene on residual CHMI concentration, glass transition temperature (T g ), molecular weight, and molecular weight distribution were studied.
๐ SIMILAR VOLUMES
A new series of aromatic heterocyclic poly(ary1 pyromellitimide-ether)s have been synthesized from various disodium metal bisphenolate salts with an N,N-bis(p-nitro-pheny1)pyromellitimide via aromatic nitro displacement solution polycondensation in dipolar aprotic solvent at elevated temperature. Th
## SYNOPSIS N-Cyclohexylmaleimide (CHMI) was synthesized in high yield by dehydration and ring closure of N-cyclohexylmaleamic acid (CHMA) in an organic nonpolar solvent that is immiscible with water in the presence of a catalyst consisting of a mixture of acid and its amine salt. The optimal molar