Synthesis of Oxidoreduction-Sensitive Films by Stable Free-radical Polymerization

• Main Authors: Shuo-Hsueh Lu, 呂學碩
• Other Authors: 鄭國忠
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/7p9jws

碩士 === 國立臺北科技大學 === 化學工程所 === 94 === Polychloromethylstyrene, PCMS, macro-initiators were synthesized by a stable free radical polymerizations in the presence of 2,2’,6,6’-teramethyl-1-piperidinyloxy (TEMPO) and benzoyl peroxide initiator (BPO); then the TEMPO-capped PCMS were extended by polymerization with styrene monomers to synthesize PCMS-b-PS block copolymers. The PCMS and block copolymers were further modified by nicotinamide to prepare quaternized PCMS, q-PCMS, and q-PCMS-b-PS block copolymers. The polymers were further blended with PVA in water, and the mixture was casting on a glass slide and dried to form a film. The absorption of a drop of solution with oxidant or reductant by the film was observed by an optical microscope. It was found that the rate of absorption depended significantly upon the oxidant and reduced state of the drop. The rate is faster under higher concentration of reductant, but is very slow in more oxidant state. The oxidoreduction property of the film made of the q-PCMS-b-PS block copolymers is more sensitive than that of q-PCMS homopolymers.