室温硫化电子灌封胶的制备及其性能研究  

Preparation and property of electronic silicone rubber vulcanized in room temperature

作　　者：林志远[1] 柯勇[1] 胡孝勇[1] 

机构地区：[1]广西科技大学生物与化学工程学院,柳州545006

出　　处：《化工新型材料》2017年第5期46-48,共3页New Chemical Materials

基　　金：广西研究生教育创新计划(YCSZ2015208)

摘　　要：采用α,ω-端羟基聚二甲基硅氧烷(107硅油)和含氢硅油(PMHS)进行缩合制备双组分脱氢型电子灌封胶,采用催化剂双(乙酰丙酮酸)二丁基锡(LADB)代替以往的二月桂酸二丁基锡(DBTDL),解决了以往脱氢型缩合硅橡胶存在室温硫化慢的难题,加入纳米ZnO颗粒改善灌封胶的力学性能。考察了催化剂、纳米ZnO颗粒用量对材料物理机械性能的影响,并表征了材料的微观相态及热稳定性。结果表明:在相同条件下,LADB的催化效果远远高于DBTDL。随着LADB含量的增加,灌封胶的表干时间和深度固化时间大大降低,材料力学性能出现先增大后降低现象,综合考虑灌封胶的性能及其实际应用,最佳LADB含量为2%(wt,质量分数,下同)。纳米ZnO颗粒的加入提高了灌封胶的力学性能,且随着改性纳米ZnO颗粒含量的增加,黏度剧增,拉伸强度和邵尔A硬度改善幅度减小,最佳改性纳米ZnO颗粒含量为40%。灌封胶断面未出现缩孔的形状,纳米ZnO颗粒均匀分布,增强内部结构,可有效提高材料的机械性能。材料热失重5%的温度为360℃,在420℃以下为玻璃态,材料放热速率小,综合性能到达电子灌封胶的要求。The electronic silicone rubber that vulcanized in room temperature was prepared by using dimethyl hydroxy-terminated（107） and hydrogen silicone oil （PMHS）. Used 2, 4-pentanedionate （LADB） instead of previous dilaurate dibutyltin （DBTDL）,the problem of curing slow for the dehydrogenation was solved,and added nano ZnO patti cles to improve the mechanical properties of silicone rubber. The effects of catalyst and nano ZnO particles on the mechani cal properties of material were investigated,and characterized the microstructure and thermal stability of materials. The resuits showed that the catalytic effect of LADB was much higher than DBTDL under the same conditions. With increasing the content of LADB,glue dry time and depth curing time were greatly reduced, the material properties increased first and then reduced. Considering the pouring sealant properties and practical application,the best LADB quality fraction was 2 %. Added ZnO particles to improve the mechanical performance and with the increase of ZnO particle the viscosity increased, and tensile strength and the improving amplitude of shore A hardness decreased. The best quality fraction of ZnO particles was 40 % Section of silicone rubber did not appear shrinkage hole shape. ZnO particles that uniformly distributed enhanced internal structure,effectively improved the mechanical properties of materials. The temperature which the thermal weight lessness 5wt% of silicone rubber was 360℃, the heat release rate of material was small in glass state which temperature lower 420℃.

关 键 词：107硅油 含氢硅油 电子灌封胶 ZnO颗粒 

分 类 号：TQ436[化学工程]