摘要
在相同硬段含量下,以不同比例己二酸丁二醇聚酯二元醇(AC-5)和环乙封端聚二甲基硅氧烷(EO-PDMS)为混合软段,制备了EO-PDMS改性聚氨酯弹性体。考察了混合软段中EO-PDMS含量对该弹性体耐低温性能、表面性能、力学性能和耐水解性能等的影响,并采用红外光谱、差式扫描量热法、接触角测量仪等方法进行表征。结果表明,混合软段中EO-PDMS质量分数为10%时,改性材料在基本保持普通聚酯型聚氨酯弹性体高力学性能的同时,其水解稳定性和低温性能也得到了大幅改善。
A series of siloxane-containing polyurethane elastomers were synthesized with different ratio of poly- ester polyol （ AC-5 ） and epoxy ethane terminated polydimethylsiloxane （ EO-PDMS ） as soft segments under the same hard segment content. The structure, surface property and low-temperature resistance were chara6terized by FTIR, contact angle measurement and DSC, respectively. The results showed that the hydrolysis stability and low- temperature resistance of copolymers had a certain degree of improvement, while the mechanical properties of the polyester type polyurethane elastomers were kept highly when the ratio of EO-PDMS was 10% in soft segments.
出处
《聚氨酯工业》
2012年第6期9-12,共4页
Polyurethane Industry
关键词
EO-PDMS
聚氨酯弹性体
力学性能
低温性能
水解稳定性
EO-PDMS
polyurethane elastomer
mechanical property
low-temperature resistence
hydrolysis stability
