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Synthesis and Characterization of New Polyesters Having Unsaturated Groups from Bis [4-(alkyloxy)benzilidene]succinic Anhydride  

김용석 (한국화학연구원 화학소재연구부)
진왕철 (포항공과대학교 신소재공학과, 고분자연구소)
정진철 (포항공과대학교 신소재공학과, 고분자연구소)
Publication Information
Polymer(Korea) / v.26, no.4, 2002 , pp. 439-444 More about this Journal
Abstract
Several monomeric benzilidene anhydrides (2a~d) haying n-alkyloxy groups with various n-alkyl chain lengths were prepared by Stobbe condensation of diethyl succinate with 4-(n-alkyloxy)benzaldehyde (1a,b) followed by hydrolysis by the succinates and cyclodehydration of the benzilidenated succinic acids. Configurational isomerism of the monomer was investigated by spectroscopic means. It was found that monomers (2a~d) exist in (Z,Z)-isomeric structure. Polymerization was carried out in bulk at 150~$210^{\circ}C$ range in nitrogen flow. The chemical structure and thermal properties of the polymers were characterized by spectroscopic means, TGA and DSC. Their properties highly depended on their chemical structures in accordance with a side chain length.
Keywords
polyester; benzilidene succinic anhydride; alkyloxy side chain;
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