Article
  • Synthesis of the Copolymers Bearing m-Isopropenyl-α,α-dimethylbenzyl Isocyanate Blocked with Butanone Oxime and Their Crosslinking Behaviors
  • Ahn JS, Choi DH, Rhee TH, Kim N
  • Butanone Oxime으로 봉지된 m-Isopropenyl-α,α-dimethylbenzyl Isocyanate계 공중합체 합성 및 자체 가교현상
  • 안종수, 최동훈, 이태형, 김낙중
Abstract
We synthesized new copolymer which contains the monomer resulting from the reaction of m-isopropenyl-alpha,alpha-dimethyibenzyl isocyanate (m-TMI) with chromophore and m-TMI blocked with butanone oxime. We anchored 4'-[(6-hydroxyhexyl) methylamino]-4-nitroazobenzene as a second-order nonlinear optical active chromophore. After regeneration of isocyanate following thermal dissociation of butanone oxime, we Investigated the inter-or intra-molecular crosslinking reaction between the secondary amine in carbamate and regenerated isocyanate. This crosslink reaction was traced via in-situ FT-IR spectroscopy method. Also, we synthesized the non-crosslinkable copolymer which bears methylmethacrylate and monomer with same chromophore used above. Alter poling the sample, we calculated the order parameters and investigated its relaxation behavior at 100 degrees C.

우레탄기를 연결쇄로 발색단이 결합된 m-isopropenyl-α,α-dimethylbenzyl isocyanate (m-TMI)와 butanone oxime이 봉지되어 있는 m-TMI 두 가지 단량체를 포함하는 공중합체를 제조하였다. 발색단으로는 이차비선형 광학 특성을 나타내는 4'-[(6-hydroxyhexyl)methylamino]-4-nitroazobenzene을 결합시켜 사용하였다. 열적으로 옥심이 해리된 후 생성되는 이소시아네이트기와 우레탄에 존재하는 이차아민과의 분자간 또는 분자내 가교현상을 유도하고 이를 적외선 분광 광도법으로 관찰하여 보았다. 또한 이를 같은 발색단을 가지는 비가교성 메틸메타크릴레피트 공중합체를 합성하여 분극처리 후 측쇄 분자쇄의 배향도를 구하여 100도에서의 완화거동을 살펴보았다.

Keywords: Blocked Isocyanate; Hydrogen Bond; Crosslink; Electro-Optic; Order Parameter

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1998; 22(1): 150-160

    Published online Jan 25, 1998