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- W2968994469 abstract "메소겐(Mesogen) 단위가 포함되어 있지 않는 para- 형태의 1,4-phenylene diisocyanate (1,4-PDI)와 2,6-bis(ω-hydroxypentoxy)naphthalene (BHN5) 또는 1,4-bis(ω-hydroxypentoxy)benzene (BHB5)을 단일과 공중합폴리우레탄을 부가중합에 의해 합성하였다. 모든 공중합폴리우레탄에서는 전단변형의 측정에서 단방성액정상을 나타내었다. 예를 들면, 고유점도가 [∩]=0.32 dL/g인 폴리우레탄 Poly(50/50, mol%)은 223℃∼211℃에서 냉각 시 액정성을 나타내었다. 그러나 두 개의 단일폴리우레탄에서는 DSC (Differental Scanning calorimeter) 측정 및 편광현미경 관찰에서도 액정상을 전혀 관찰 할 수 없었다. 합성된 폴리우레탄의 액정성은 시차주사열량분석기, 편광현미경과 X-ray에 의해 확인하였다." @default.
- W2968994469 created "2019-08-22" @default.
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- W2968994469 date "2013-01-01" @default.
- W2968994469 modified "2023-09-23" @default.
- W2968994469 title "방향족 고리를 갖는 액정폴리우레탄의 합성 및 특성" @default.
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