화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.6, No.4, 579-588, August, 1995
Export Citation
우레탄기를 포함하는 디아민/벤조퀴논 중합체의 합성과 특성 분석 III -퀴논-디올 쇄연장제로 합성한 세그멘티드 폴리우레탄의 열적, 기계적 물성-
The Synthesis and Characterization of Diamine/Benzoquinone Polymers Containing Urethane Group Ⅲ -The Thermal and Mechanical Properties of Segmented Polyurethane with Quinone-Diol Chain Extender-
조항규, 임병인, 노시태, 정일현, 이치규
초록
N-Methylethanolamine(NMEA)과 p-benzoquinone(BQ)로부터 합성된 2,5-bis(N-hydroxyethyl-N-methylamino)-p-benzoquinone(QDO)을 1,4-butane diol(BDO)와 공쇄연장제로 사용하여 퀴논 변성 세그멘티드 폴리우레탄 수지 (QPU)를 합성하였다. 디이소시아네이트로서는 4,4'-diphenylmethane diisocyanate(MDI)와 isophorone diitsocyanate(IPDI) 2종을 사용하였으며, poly(tetramethylene ether) glycol(PTMG, Mw=2,000)을 폴리올로 사용하였다. 하드세그멘 트(HS)/소프트세그멘트(SS)의 변화와 하드세그멘트내의 QDO대 BDO의 비율에 따른 세그멘티드 폴리우레탄 수지의 제반 물성을 측정하였다. HS내 QDO의 함량이 증가되었을 때, 구조자체의 bulky함에도 불구하고 하드세그멘트(HS)와 소프트 세그멘트(SS)간의 상분리도가 증가하는 경향을 열적, 기계적 성질 및 X-선 회절 분석에서 확인하였으며, 또한 QDO대 BDO틔 조성변화시 QDO의 함량을 증가시킴으로서 HS 구조내의 분자구조의 불규칙성을 기계적 특성과 X-선 회절 분석으로 관찰할 수 있었다. 함수율은 MQP가 IQP보다 민감했으며, QDO의 함량이 증가함에 따라 0.4% 이하까지 낮아졌다.
Quinone modified segmented polyurethnes(QPUs) were prepared from 2,5-bis(N-hydroxyethy-N-methylamino)-p-benzoquinone(QDO) which was synthesized from the reaction of N-methylethanolamine(NMEA) with p-bezoquinone(BQ) and 1,4-butane diol(BDO) as co-chain extenders. 4,4'-Diphenylmethane diisocyanate( MDI ) and isophorone diisocyanate(IPDI) as diisocyanates, poly(tetramethylene ether) glycol (PTMG, Mw=2,000) as polyol were respectively used. The dependence of the various ratio of hard segment(HS)/soft segment(SS) and the various combination ratio of QDO vs. BDO in hard segment(HS) on the physical properties of QPUs were investigated. As the QDO contents increased, phase separation between hard segment(HS) and soft segment(SS) was evident, despite the bulky structure, by the thermal, mechanical properties and X-ray diffractometric (XRD) analyses. As the composition of co-chain extender was changed between QDO and BDO, the structure heterogeneity was observed from the mechanical characterization and XRD analyses. In the water absorption test, the degree of water absorption was more sensitive in MQP system than in IQP and water uptake was about below 0.4% as the QDC contents increased.
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