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Home  >  Journal list  >  Polymer Journal  >  Vol.32  No.5 (2000)  >  pp.395-401

Polymer Journal
<<Previous article Vol.32  No.5 (2000)   pp.395 - 401 Next article>>

Synthesis and Characterization of Novel Polymers Containing Sulfur from 3-Mercaptopropionic Acid

Yong-Kyung LEE1), Kenjiro ONIMURA1), Hiromori TSUTSUMI1) and Tsutomu OISHI1)
1) Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611 Japan

ABSTRACT:  Three new monomers, 2-hydroxyethoxycarbonylethyl methoxycarbonylethyl sulfide (HEMS), 2-hydroxyethoxycarbonyl (2´-methyl) ethyl methoxycarbonylethyl sulfide (HMMS), and 3, 3´-dithiodiethylcarboxy allyl (DTCA) were synthesized from 3-mercaptopropionic acid (3-MPA) or methyl 3-mercaptopropionate (M3-MP). Polycondensations of HEMS and HMMS were performed with several metal acetates as catalysts to obtain the corresponding polythioethers with number average molecular weights (Mn) of up to 6.4×103. Radical polymerizations of DTCA were carried out in bulk at 110°C to obtain polymers having allyl groups in the side chain. Polymerizations of DTCA with ethylene diamine (EDA) or hexamethylene diamine (HDA) were performed under various conditions to obtain the corresponding polymers. Decomposition temperatures (Td) and glass transition temperatures (Tg) of the polymers were 146-252°C and -54--1°C, respectively. Crystallinity of the polymers obtained by polymerizations of DTCA with EDA and HDA was 25-49%


Keyword:
Polycondensation/ 3-Mercaptopropionic Acid/ Thioether/ Disulfide/ Glass Transition Temperature/ Degree of Crystallinity

Published online: June 29, 2001
© Copyright, 2000 by The Society of Polymer Science, Japan

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