低邵氏硬度SY复合型硅橡胶的配方筛选

Filtering of recipes for low hardness SY blending silicone elastomers

目的 :得到邵氏硬度分别为 18、2 0、2 2的复合型硅橡胶赝复材料 ,以满足特定缺损部位的赝复体硬度要求。方法 :质量比均匀混合 ,加入适量的混合交联剂固化并加工成长方形试样。测试其邵氏硬度 ,选出硬度值最接近 18、2 0、2 2的三种硅橡胶试样 ,确定相应的配方比例。结果 :当SY复合型硅橡胶邵氏硬度为 18.1± 3 .6、19.9± 4.1、2 2 .0± 2 .8时 ,SY 1硅橡胶和C型硅橡胶的配方比例依次为 76∶2 4、78∶2 2、84∶16。结论 :按照适当比例进行SY 1硅橡胶和C型硅橡胶的并用 ,可以得到邵氏硬度分别为 18、2 0、2 2的低邵氏硬度SY复合型硅橡胶赝复材料 。

Objective:To develop blending silicone el astomers with lower Shore A hardness for facial prostheses.Method: The base of SY-1 and C silicone elas tomers was mixed at different mass ratios, and added proper quantity of mixed cr oss-linking agent and catalyst to base, then Shore A hardness of the vulcanized specimens was measured and three base mixing ratios were identified in accordanc e with hardness nearest to 18,20,22 Shore A units.Result: The mass ratios of base were 76∶24, 78∶22, 84∶16 respectively when hardness of vulcanized specim ens were 18.1±3.6 , 19.9±4.1 , 22.0±2.8 which were the nearest to 18, 20, 22 Shore A units. Conclusion: Blending SY-1 and C silicone elastomer at proper mass rati os could obtain compound silicone elastoemrs with lower hardness which would ful fill the demands of restoration of different facial defects. [