Synthesis and mesomorphic behavior of poly(methylsiloxane)s containing trans-cyclohexane-based mesogenic side groups |
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| Authors: | Chain S. Hsu Yong H. Lu |
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| Affiliation: | (1) Polymer Science and Technology Research Laboratory, Chemistry Department, Mu'tah University, Mu'tah/Al-Karak, Jordan |
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| Abstract: | Summary A new class of segmented poly(urethane-urea-amide) (PUUA) block copolymers contained poly(oxytetramethylene) (POTM) were prepared by direct condensation of diacid chloride with amine-terminated poly(urethane-urea) (ATPUU) oligomers. The ATPUUs were prepared from the reaction of NCO-terminated polyurethane prepolymer with different diamines. The PUUAs having reduced viscosities ranged from 0.87 to 1.82 dL/g. These polymers were soluble in various polar solvents and gave transparent, tough, and flexible films by casting from m-cresol The copolymers were studied by utilizing differential scanning calorimetry (DSC), thermogravimetry (TG), and tensile testing. |
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