摘要
以α,ω-双(γ-羟丙基)聚二甲基硅氧烷(BHPDMS)和聚氧四甲基二醇(PHMO)混合大二醇作为软链段,以1,4-丁二醇(BDO)为扩链剂,采用两步溶液聚合法合成了大二醇基芳香聚氨酯(PU)弹性体,其中w(硬链段)=40%。使用傅里叶红外光谱(FT-IR)法和差示扫描量热法(DSC),研究了混合大二醇中BHPDMS与PHMO的质量比对该PU弹性体的结构形态和性能的影响。结果表明,当混合大二醇中w(PHMO)=40%-60%时,所得PU弹性体具有优异的综合力学性能和表面疏水性。
With mixing macrodiol of α,ω-bis （T-hydroxypropyl） polydimethylsiloxane （BHPDMS） and poly （hexamethyleneoxide） （PHMO） as soft segment, 1,4-butanediol （BDO） as chain extender, mass fraction of hard segment at 40%, the aromatic polyurethane （PU） elastomer based on mixing macrodiol was prepared by two-step solution polymerization. The effects of mass ratio of BHPDMS and PHMO in mixing macrodiol on morphology and performance of the PU elastomer were studied by Fourier transform infrared spectrometry（FT-IR） and differential scanning calorimetry（DSC）. The results showed that the PU elastomer has excellent synthetical mechanical performance andsurface hydrophobic performance when mass fraction of PHMO was between 40% and 60% in mixed macrodiol.
出处
《中国胶粘剂》
CAS
2008年第6期15-18,共4页
China Adhesives
基金
陕西省自然科学基金(2003E119)
