Article
  • Synthesis and Thermal Properties of Polyurethane-Poly(butylene terephthalate) Multiblock Copolymers
  • Ahn TO, Youn YJ, Jeong HM
  • Polyurethane-Poly(butylene terephthalate) Multiblock 공중합체의 합성과 열적 성질
  • 안태완, 윤영주, 정한모
Abstract
Polyurethane(PU)-poly(butylene terephthalate) (PBT) multiblock copolymers (BC''S) were synthesized from PBT oligoester,1,4-butandiol, and methylene-bis- (4-phenylisocyanate). The change of thermal properties due to the change of the content or the molecular weight of PBT block in BC was studied. BC''s, quenched after melting, have a single glass transition temperature(Tg), which shows that the length of the blocks in BC is not long enough to occur sufficient phase separation. Melting temperature(Tm) and crystallization temperature (Tmc ) were increased with the content of the PU block in BC. From the thermal properties, such as Tg or Tm. better separation of phase was observed in the BC synthesized from PBT oligoester of larger molcular weight.

Poly(butylene terephthalate)(PBT) oligoester, 1,4-butanediol, 그리고 methylenebis- (4-phenylisocyanate)를 반응시켜 Polyurethane (PU)-PBT multiblock 공중합체 (BC)를 합성하고, BC중 PBT block의 함량과 분자량의 변화에 따른 열적 성질의 변화를 관찰하였다. 용융 후 급냉시킨 BC에서 한개의 유리전이온도 (Tg)를 관찰할 수 있었으며. 이는 각 block의 길이가 짧아 충분한 상분리가 일어나지 못함을 보여준다. 녹는점 (Tm)과 결정화 온도(Tmc)는 PU domain의 함량이 증가함에 따라 증가하는 경향을 보였다. 한편 PBT block의 함량이 일정한 경우, PBT block의 분자량이 클수록 PBT domain과 PU domain의 상분리가 큼을 Tg, Tm 으로 부터 관찰할 수 있었다.

Keywords:

  • 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

  • 1989; 13(3): 221-228

    Published online Mar 25, 1989

  • 10.7317/pk.
  • Received on Nov 30, -0001
  • Revised on Nov 30, -0001
  • Accepted on Nov 30, -0001

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