Article
  • Synthesis and Properties of Poly[2-n-alkyl-1,4-phenylene bis(4,4'-dimethylsibenzoate)]
  • Lee SM, Cheong JH, Kim KS, Lee KS
  • Poly[2-n-alky-1,4-phenylene bis(4,4'-dimethylsibenzoate)]의 합성 및 물성
  • 이수민, 정재희, 김기수, 이광섭
Abstract
Several silicon-containing aromatic polysters with flexible aide branches were synthesized by solution, melt and interfacial polycondensatlon of bis (4- chlorocarbonyphenyl)dimethylsilane with 2-n-alkylhydroquinones. All polymers were soluble In polar soluble in polar solvent like THF, chloroform, DMF, pchlorophrnol, etc, and their inherent viscosities ranged from 0.23 to 1.23 d1/g depfnding on the length of side branches, and polymerzation mothods. The phase transition duct to sidle chain melting of these polyesters were detectable at 46∼99℃, whose values decreased with increasing the length of side chains. The initial decomposition(7,4) in TGA curves appealed at 307∼309℃ in N2 gas and residual weights at 800℃ were 21.4%∼35.2%. Wide angle X-ray diffractograms showed that alkylsubstituted polyesters have some crystallinity resulting from crystallization of flexible side branches.

규연성 곁사슬이 도입된 실리콘 함유 방향족 폴리에스테르는 bis(4-chlorocarbonyl) dimetylsilan과 2-n-alkylhydroquinone의 용액, 용융 및 계면중축합 반응에 의해 합성하였다. 모든 중합체들은 THF, chloroform, DMF, p-chlorophenol 등과 간은 극성용매에 용해되었으며 용액점도는 곁사슬의 길이와 중합방법에 따라 0.23∼1.23dl/g으로 측정되었다. 이들 중합체들의 곁사슬의 용융에 기인한 성전이는 46∼99 ℃의 범위에서 관측할 수 있었는데 그 온도는 곁사슬의 길이가 증가하면서 감소하는 경향을 보였다. TGAA 곡선상에 나타난 초기 분해온도(Tid)는 질소가스 분위기하에서 307∼309 ℃이었으며, 800 ℃에서의 잔존 질량은 21.4∼35.2%로 겉사슬의 길이가 길어질수록 중합체내에서 방향족 성분의 양이 감소하여 낮은 값을 보였다. X-선 회절 실험 결과 알킨기가 치환된 중합체는 겉사슬의 격성화에 기인하여 약간의 결정성이 있음을 알 수 있었다.

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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

  • 1993; 17(4): 463-471

    Published online Jul 25, 1993