高分子混合系の相分解による表面エネルギー特性の制御

第2報　アラミド/ポリエチルオキサゾリン混合系

抄録

A mixture of aramid and poly (ethyl oxazoline) was found to exhibit LCST (lower critical solution temperature) type phase behavior. A regularly phase-decomposed morphology developed by a temperature-jump from single-phase region to two-phase region above LCST and the morphology could be fixed by a rapid quench down to room temperature. We prepared a series of phase-decomposed specimens by changing the temperature and time of annealing and estimated the surface tension of the decomposed specimens by measuring the liquid contact angle at room temperature. Surface tension increased with time of annealing. Taking into account the result on the kinetics of phase decomposition by light scattering, the change in surface tension was ascribed to the progress of phase decomposition. Furthermore, FT/IR analysis revealed that this phenomenon is due to the dissociation of the hydrogen bonding type interaction between the component polymers.