CAJ | 학술논문

以摩尔质量较大的端羟基聚二甲基硅氧烷（107硅橡胶）为软段、液化改性二苯基甲烷-4，4'-二异氰酸酯为硬段，空气中的水分为交联剂制备了聚硅氧烷-聚氨酯（ PDMS-PU）共聚物。采用傅里叶红外光谱仪（ FTIR）对材料的结构进行分析，并测试了材料的固化性能、力学性能、水解性能以及耐油性能。结果表明，随着107硅橡胶含量的增加，PDMS-PU共聚物的拉伸强度先增后减，拉断伸长率逐渐下降；共聚物的力学性能随着固化时间的增加先增后减；经改性后，PDMS-PU的耐油性能大大提高了，随着107硅橡胶含量的增加，共聚物的耐油性明显下降。当107硅橡胶质量分数为80%，固化温度为20℃时，共聚物17 h后完全固化，固化后拉伸强度为0.8 MPa，拉断伸长率为75%，此时共聚物耐油性较好。
이마이질량교대적단간기취이갑기규양완（107규상효）위연단、액화개성이분기갑완-4，4'-이이청산지위경단，공기중적수분위교련제제비료취규양완-취안지（ PDMS-PU）공취물。채용부리협홍외광보의（ FTIR）대재료적결구진행분석，병측시료재료적고화성능、역학성능、수해성능이급내유성능。결과표명，수착107규상효함량적증가，PDMS-PU공취물적랍신강도선증후감，랍단신장솔축점하강；공취물적역학성능수착고화시간적증가선증후감；경개성후，PDMS-PU적내유성능대대제고료，수착107규상효함량적증가，공취물적내유성명현하강。당107규상효질량분수위80%，고화온도위20℃시，공취물17 h후완전고화，고화후랍신강도위0.8 MPa，랍단신장솔위75%，차시공취물내유성교호。
Polysiloxane-polyurethane( PDMS-PU)copolymer,curing by catalyzator organotin and mois-ture,were prepared by the high molecular mass of hydroxyl-terminated polydimethylsiloxane( 107 silicone rubber)as soft segments and liquefied 2-phenyl methane-4,4'-diisocyanate as hard segment. The structure of PDMS-PU was analyzed by FTIR,and the properties of PDMS-PU,such as curing properties,mechanical properties,hydrolysis properties and oil-resistance,were also investigated. Results show when the mass frac-tion of 107 silicone rubber is 80%,the copolymer cured completely after 17 hours at 20℃,it has good oil re-sistance,a tensile strength of 0. 8 MPa,and elongation at break of 75 %.