Synthesis and properties of novel aromatic polyimides derived from bis(p-aminophenoxy)methylphenylsilane

✍ Scribed by Der-Jang Liaw; Wen-Chung Ou Yang; Lain-Jong Li; Mei-Hui Yang

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 500 KB
• Volume: 63
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970118)63:3<369::aid-app13>3.0.co;2-w

✦ Synopsis

A novel siloxane-containing diamine, bis(p-aminophenoxy )methylphenylsilane (BAMPS), was synthesized from the condensation of dichloromethylpheny lsilane with p-aminophenol in the presence of triethylamine. A series of BAMPS-based aromatic polyamides were prepared from BAMPS and various aromatic tetracarboxylic dianhydrides by the usual twostep procedure including ring-opening polyaddition to poly(amic acid)s and subsequent cvclodehydration to polyamides. The inherent viscosities of poly(amic acid)s IIIa-IIIf ranged from 0.09 to 0.36 dL g ' in N, N-dimethylacetamide at a concentration of 0.5 g dL ' at 300('. The inherent viscosities of polyamides were between 0.06 and 0.32 dL g-' in various solvents at 30°C. Polyamides, especially IV= and IV~, were soluble in a wide range of organic solvents such as IV-methyl -2-pyrrolidinone, concentrated HzSOi, N, N-dimethylacetamide, N, N-dimet hy]formamide, and dimethyl sulfoxide. The polyamides were characterized by elementary analysis, IR spectra, TGA, and DSC. They also had glass transition temperatures ranging from 128 to 181 "C. The 10% mass loss temperature was recorded in the range of 404-44; \0C in nitrogen and of 315-339°C in oxygen.