On the gas permeability of hydroxyl terminated polybutadiene based polyurethane membranes
作者： Shih-Liang Huang , Juin-Yih Lai
DOI: 10.1016/0376-7388(94)00319-T
关键词: Solution polymerization 、 Membrane 、 Hydroxyl-terminated polybutadiene 、 Polyurethane 、 Polyol 、 Isophorone diisocyanate 、 Polymer chemistry 、 Chemistry 、 Polymerization 、 Hydrogen bond
摘要: Abstract A series of hydroxyl terminated polybutadiene (HTPB) based polyurethanes (PU) were synthesized by solution polymerization with different kinds polyols and diisocyanates, hard segment contents, NCO OH value, methods annealing time. The segregation between soft segments was manifested incompatibility segment, steric hindrance urethane groups the extent interchain hydrogen bonding. Hydrogen bonding index (HBI) measured FTIR employed to show bonding, which affects hence gas permeability prepared membranes. Membranes high HBI seen have low permeability. mixed diisocyanates polar 4,4′-diphenylmethane diisocyanate (MDI) nonpolar isophorone (IPDI), lower content one-stage exhibit higher
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