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Indexed by:期刊论文

Date of Publication:2011-05-03

Journal:MACROMOLECULAR CHEMISTRY AND PHYSICS

Included Journals:Scopus、SCIE、EI

Volume:212

Issue:9

Page Number:926-936

ISSN No.:1022-1352

Key Words:crosslinking; cycloaliphatic; epoxy resins; structure/property relations; synthesis

Abstract:The manipulation of the properties of cycloaliphatic epoxy resins by systematical variations of the molecular structure is demonstrated. Specifically, four cycloaliphatic epoxy resins with silicon-center linked via methyl, phenyl, and epoxy groups of different number were synthesized. The cured epoxides had remarkably changed crosslinking density from 0.45 x 10(-3) to 9.64 x 10(-3) mol.cm(-3), glass transition temperature from 133 to 237 degrees C, and considerably decreased thermal expansion coefficient from 6.44 x 10(-5) to 4.83 x 10(-5) K(-1). It was proved that the higher crosslinking density was related to more opened segments by wide-angle X-ray diffraction. The physical properties of cured products and their correlations with the chemical structures were investigated in detail.