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以乙烯基MQ硅树脂、含氢硅油、氯铂酸-异丙醇和炔基环己醇为原料,制备高强度、高透紫外线硅橡胶,研究了催化剂用量对硅橡胶固化过程、力学性能和光学性能的影响。研究表明:催化剂用量的增加可提高反应速率;催化剂用量在0.2%~1%(wt,质量分数,下同)之间增加时,力学性能得到显著提高;超过1%时,力学性能提高的不明显。随着催化剂用量的增加,紫外透过率会下降,比如在350nm波长时,催化剂用量从0.2%增加到1.2%,紫外透过率会从93.2%下降到89%。
High strength and high UV transparent silicone rubber were prepared from vinyl MQ silicone resin, hydrogen silicone oil, chloroplatinic acid-isopropanol and alkynyl cyclohexanol. The effect of catalyst dosage on the curing process, mechanical properties and optical properties The impact of performance. The results show that the increase of the amount of catalyst can increase the reaction rate. When the amount of catalyst is increased from 0.2% to 1% (wt, mass fraction), the mechanical properties are significantly improved. When the amount of catalyst is increased above 1%, the mechanical properties are not improved obvious. As the amount of catalyst increases, the UV transmittance decreases. For example, at 350 nm, the amount of catalyst increases from 0.2% to 1.2% and the UV transmittance decreases from 93.2% to 89%.