【摘要】 以四甲基环四硅氧烷（D₄^H）、八甲基环四硅氧烷（D₄）、六甲基二硅氧烷（MM）、乙烯基三甲氧基硅烷和烯丙基缩水甘油醚为原料,合成了含环氧基和烷氧基的有机硅增粘剂PHMS-12,将其用于加成型液体硅橡胶。并对该增粘剂进行了结构表征,考察了PHMS-12用量对加成型液体硅橡胶的黏度、硬度、硫化特性以及对各种基材粘接性能的影响。结果表明:当PHMS-12用量为0. 8%时,加成型液体硅橡胶与聚对苯二甲酸乙二醇酯（PET）、聚酰亚胺（PI）、不锈钢、铜、铝等基材的粘接良好,此时硅橡胶的拉伸强度为7. 3 MPa,拉断伸长率为400%,撕裂强度为30. 5 kN/m,邵尔A硬度为61度,焦烧时间(t₁₀)和正硫化时间(t₉₀)分别为34 s、86 s。更多还原

【Abstract】 A silicone tackifier PHMS-12 with epoxy and alkoxy functional groups for the addition-cure liquid silicone rubber（ LSR） was prepared,with tetramethylcyclotetrasiloxane（ D₄^H）,octamethylcyclotetrasiloxane（ D₄）,hexamethyldisiloxane（ MM）,vinyl trimethoxysilane,and allyl glycidyl ether as the raw materials. Then the microstructure of the tackifier was characterized. The effects of the amount of PHMS-12 on the viscosity,the hardness,curing characteristics of the liquid silicone rubber,and adhesion properties on the various substrates were investigated. Results show that when the amount of PHMS-12 is 0.8%,the addition-cure LSR is well bonded to polyethylene terephthalate（ PET）,polyimide（ PI）,stainless steel,copper,aluminium and other substrates. The silicone rubber has the tensile strength of 7. 3 MPa,the elongation at break of400%,the tear strength of 30.5 kN/m,Shore A hardness of 61,and the scorch time t₁₀ and the positive curing time t₉₀ is 34 s and 86 s,respectively.更多还原