摘要
用傅里叶变换红外光谱(FTIR)衰减全反射谱(ATR)研究了溶液聚合的四种模型嵌段聚氨酯(聚氨酯-氨酯、聚脲-氨酯、聚氨酯-脲和聚脲-脲)。用ATR谱说明了在硬段微区和硬段微区软段微区的相界面区,不同键对这些聚合物热性质和力学性质的影响,并详细讨论了ATR谱的羟基C=O、醚氧键C—O—C、酰胺Ⅱ谱带及氢键的情况。
These linear thermoplastic polyurethanes and polyureasare synthsized by a two-step solution polymerization method. Either a hydroxy-terminated polypropylene oxide (PPO-OH) of Mn= 2040 or an amine-terminated polypropylene oxide(PPO-NH2)of Mn = 2100 is used as the soft segment to produce the urethane or ure linkages respectively at the ends of the polyether backbones. Pure 4, 4-diphenylmethane diisocyanate(MDI) is extended with either 1,4-butane diol (BDO) to form the urethane hard segments or with 1,4-butane diamine(BDA) to form the urea hard segments . Four different cominations of polyurethane-urethane, polyurea-urethane, polyurethane-urea, polyurea-urea are obtained. Attenuated Total Reflection (ATR) of Fourie Transform Infrared Spectroscopy(FTIR)are used to characterize the samples to evaluate the effects of different linkages,either at the interface of the phase boundaries or within the hard segment domains on the thermal and mechanical properties. Carbonly region , ether region amide I region and hydrogen bond are discussed in detail.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1992年第6期84-88,共5页
Polymer Materials Science & Engineering
关键词
聚氨酯
聚脲
傅里叶变换
光谱
氢键
polyurethane,polyurea,fourie transform infrared spectroscopy(FTTR) attenu-ated total reflection(ATR) .hydrogen bond.
