キトサン存在下でのソルビン酸とメタクリル酸のラジカル不斉共重合
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概要
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The radical copolymerization of sorbic acid (SA) with methacrylic acid (MAA) was carried out in an aqueous solution at 50°Cusing potassium persulfate (KPS) as initiator in the presence of chitosan (CS). The mole ratio of CS (base mole) to the sum of SA and MAA was kept at 1.0. SA unit in the copolymer bore 1, 4-trans type structure. Monomer reactivity ratios r<SUB>1</SUB> and r<SUB>2</SUB> for SA (1) -MAA (2) in the presence of CS were 0.80 and 6.80 respectively, while r<SUB>1</SUB> and r<SUB>2</SUB> for SA·Na (1) -MAA·Na (2) in the absence of CS were 1.21 and 1.15, respectively. The copolymer obtained in the presence of CS showed optical activity, the sign of which was opposite to that of CS. Ozonolysis of the copolymer with 0.06 mole fraction SA unit resulted in optically active oligomers with the specific rotation +1.01°in chloroform. Number average molecular weight of the copolymer before and after ozonolysis were 9700 and 340, respectively.
- 公益社団法人 高分子学会の論文
公益社団法人 高分子学会 | 論文
- 情報の入口--高分子センサ-とトランスデュ-サ- (情報化社会と高分子)
- 高分子科学最近の進歩--メルトレオロジ-(伸長粘度)
- 高分子系の相分離--特にポリマ-ブレンドについて
- 導電性高分子の磁気緩和--NMRT-1〓1の周波数依存性
- 多機能性高分子の合成 (化学修飾による多機能性高分子)