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Effects of Catalyst Isoquinoline in Polymerization Process on the Aggregation Structures of Polyimide in Solution
Author(s) -
Liu Xiangyang,
Yang Jin,
Guo Linghong,
Gu Yi
Publication year - 2005
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200500485
Subject(s) - isoquinoline , polyimide , polymerization , materials science , polymer chemistry , catalysis , chemical engineering , layer (electronics) , polymer , chemistry , composite material , organic chemistry , engineering
Summary: A thermoreversible gel or a dendritic crystal has been obtained in a novel polyimide solution at low temperature, depending on the approach taken to add the isoquinoline catalyst during the polymerization process. By adding the isoquinoline at the beginning of polymerization, two kinds of layer structures in the gel are developed. However, by adding the isoquinoline after the polymerization has been carried out for one hour, a perfect dendritic crystalline structure is gradually developed in the polymerization solution.PLM photographs of the obtained polyimide crystals.