Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2011-05-03

Journal: MACROMOLECULAR CHEMISTRY AND PHYSICS

Included Journals: EI、SCIE、Scopus

Volume: 212

Issue: 9

Page Number: 926-936

ISSN: 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.