Studies on polyimides containing thermoplastic-thermosetting merged segments

Autor:	Yogesh S. Patel
Rok vydání:	2014
Předmět:	chemistry.chemical_classification Thermoplastic Materials science Polymers and Plastics chemistry Polymer science General Chemical Engineering Materials Chemistry Thermosetting polymer Polyimide Diels–Alder reaction
Zdroj:	Journal of Polymer Engineering. 34:451-457
ISSN:	2191-0340 0334-6447
DOI:	10.1515/polyeng-2014-0026
Popis:	Polyimides (PIs) containing thermoplastic and thermosetting merged segments in a chain were developed via Diels-Alder (DA) polymerization of a bisfuran (BF), namely 2,5-bis(furan-2-ylmethylcarbamoyl)terephthalic acid and bismaleimides (BMI1 and BMI2). The intermediate DA polyadducts thus obtained, DAA1 and DAA2, were aromatized and imidized (cyclized) through carboxylic and amide groups in the presence of acetic anhydride, to afford PI1 and PI2. Synthesized DA polyadducts and PIs were characterized by elemental analysis, spectral features, number average molecular weight (Mn), degree of polymerization (Dp) and thermal analysis. Bulk polymerization was also carried out. The obtained bulk polymerization products (BPP1 and BPP2) were characterized by elemental analyses and Fourier transform infrared spectroscopy (FT-IR) analysis. The “in situ” void-free glass fiber reinforced composites GFRC1 and GFRC2 were prepared from the produced system and characterized by chemical, mechanical and electrical analysis. All of the composites depicted good mechanical and electrical properties and good resistance to organic solvents and mineral acids.
Databáze:	OpenAIRE
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