SYNTHESIS AND CHARACTERIZATION OF POLY(ASPARTIC ACID) AND ITS DERIVATIVES AS BIODEGRADABLE MATERIALS |
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| Authors: | TAKESHI NAKATO KYOKO ODA MASAKO YOSHITAKE MASAYUKI TOMIDA TOYOJI KAKUCHI |
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| Institution: | 1. Tsukuba Research Center, Mitsubishi Chemical Corporation , 8-3-1, Chuo, Ami, Inashiki, Ibaraki, 300-0332, Japan;2. Graduate School of Environmental Earth Science, Hokkaido University , Sapporo, 060-0811, Japan |
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| Abstract: | ABSTRACT Three types of modified poly(aspartic acid)s, such as poly(aspartic acid-co-aminocarboxylic acid) (4), alkylamine modified poly(aspartic acid) (5) and crosslinked poly(aspartic acid) (6), were synthesized and calcium-ion chelating ability, hygroscopicity and water absorption were evaluated. The calcium-ion chelating ability of 4 depended on the kind of aminocarboxylic acids and the content of aminocarboxylic acid in the copolymer. The highest value was 3 times higher than that of poly(acrylic acid) with a Mw of 14000. The highly modified PASP, e.g., 50 mol% lauryl amine modified poly(aspartic acid), showed the highest by grogroscopicity among homopoly(aspartic acid)s and modified poly(aspartic acid)s. The maximum swelling of poly(aspartic acid) hydrogel prepared by the γ-irradiation of homopoly(as-partic acid) was 3400 g-deionized water/g-dry hydrogel. |
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| Keywords: | L-Aspartic Acid Poly(aspartic acid) Poly(succinimide) |
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