Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Synthesis of Copolymers by Photocationic Polymerization(III)-Photocationic Copolymerization of $\beta$-butyrolactone and $\alpha$-methylstyrene in the Presence of Diphenyliodonium Hexafluorophosphate -

광양이온중합에 의한 공중합물의 합성(III)-디페닐요도늄헥사플루오로포스페이트 존재 하에서의 베타-부티로락톤과 알파-메틸스티렌의 광양이온공중합-

  • 마석일 (인하대학교 공과대학 섬유공학과) ;
  • 최철호 (인하대학교 공과대학 섬유공학과)
  • Published : 1994.10.01

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Abstract

Photo-induced polymerization of DL-P-butyrolactone(BL) and its copolymerization with a-methylstyrene(MeSt) were carried out in the presence of diphenyliodonium hexarluorophosphate(salt). a wall known photocationic initiator. It has been fecund that oligo(hytlroty butyrdte) was obtained in high yield, however only oligomers with low molecular weight was results from this system. And an attempt to obtain talc polymer with high molecular weight by copolymerization with MeSt was not successful. This reveals that the reactivity of the cationic species, which is responsible for the cationic propagation of the BL. is so reactive that the propagating cationic species was not stabilized enough to depress the chain transfer reaction by ion pair formation with less nucleophilic hexafluorophosphate ion, supplied from the salt. The reactivity ratio of MeSt (r1) and BL(r2), calculated by Mayo-Lewis method, gave the values of 1.5 and 0.083, respectively.

Keywords

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