A study of novel heat-resistant polymers: Preparation of photosensitive fluorinated polybenzoxazole precursors and physical properties of polybenzoxazoles derived from the precursors

Autor:	Tsuguo Yamaoka, Nobuko Nakajima, Maruyama Yutaka, Ken'ichi Koseki
Rok vydání:	1990
Předmět:	chemistry.chemical_classification Heat resistant Condensation polymer Polymers and Plastics Chemistry Organic Chemistry Polymer Chloride Chain structure Dicarboxylic acid Polymer chemistry Materials Chemistry medicine Irradiation medicine.drug Shrinkage
Zdroj:	Journal of Polymer Science Part A: Polymer Chemistry. 28:2517-2532
ISSN:	1099-0518 0887-624X
DOI:	10.1002/pola.1990.080280924
Popis:	A series of novel photosensitive polybenzoxazole precursors were prepared from polycondensation of 2,2-bis(3,3′-amino-4,4′-hydroxyphenyl)hexafluoropropane with photosensitive dicarboxylic acid chlorides such as p-phenylenediacryloyl chloride and benzophenone-4,4′-dicarboxylic chloride. The precursors are soluble in common organic solvents owing to the presence of perfluoromethyl groups in the chain structure, and insolubilized in the solvents on irradiation with the light. Polybenzoxazole patterns with high resolution as well as high aspect ratio were reproduced by baking the precursor patterns at 300°C. The pattern shrinkage on the conversion to polybenzoxazole was slight. The polybenzoxazole films offered good heat-resistance up to 400°C in addition to good electrical properties.
Databáze:	OpenAIRE
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