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Indexed by:期刊论文

Date of Publication:2013-11-01

Journal:POLYMER DEGRADATION AND STABILITY

Included Journals:SCIE、EI

Volume:98

Issue:11

Page Number:2125-2130

ISSN No.:0141-3910

Key Words:Cycloaliphatic epoxide; Sulfite; Thermal degradation; Reworkable; Electronic packaging

Abstract:Liquid cycloaliphatic diepoxide containing sulfite group (Epoxide-S) was designed and synthesized through the two-step reactions: the nucleophilic substitution between thionyl chloride and cyclohex-3-1-methanol, and the subsequent epoxidation. The chemical structures of the epoxidized product and its olefin precursor were confirmed by FTIR and H-1 NMR spectra. Different from conventional thermosetting epoxy resins, the cured Epoxide-S started to decompose at 185 degrees C. The apparently lower degradable temperature is desirable for reworkable electronic packaging materials because the dismantlement of waste electronic products or the replacement and repair of faulty chips become convenient. Moreover, after co-curing between Epoxide-S and the commercial cycloaliphatic diepoxide ERL-4221, the thermal degradation temperatures of the copolymers were tunable in the range from 185 to 323 degrees C by varying the ratio of two monomers. The unique degradation behaviors were investigated by means of computer calculation, thermogravimetric analysis, and FTIR spectra. (C) 2013 Elsevier Ltd. All rights reserved.