交联剂加入量对SY-1型硅橡胶物理性能的影响

The effect of cross-linker ratio on the physical properties of SY-1 silicone elastomer

目的：确定固化ＳＹ－１型硅橡胶时交联剂的最适加入量。方法：测试了交联剂５种不同加入量：０．５％、１％、１．５％、２％、２．５％（与胶料的质量之比）时ＳＹ－１型硅橡胶的物理性能。结果：交联剂加入量为胶料的１％时固化后的硅橡胶其物理性能综合来看为最好：扯断伸长率为（４４０±５４）％，扯断强度为（４．３±０．２８） ＭＰａ，撕裂强度为（１８．２±３．１） ｋＮ／ｍ，邵氏Ａ硬度为（２４±３．６） Ｕ；结论：在交联剂加入量与胶料的质量分数为ω＝１％时，ＳＹ－１型硅橡胶可获得更好的物理性能。

Objective: To evaluate the physical properties of SY-1 silicone elastomer with various ratios of cross-linker to base. Methods: The ratios of cross-linker to base were set at 0.5 %、1 %、 1. 5 %、 2 % 、2. 5 % respectively while other conditions were kept same, then the major physical properties of the elatomer were studied with a tensile tester and ASTMD 2240 method. Results: The elongation(%) due to tension, tensile strength (MPa), laceration strength (kN/m) and hardness (A) of SY-1 silicone elastomer with the ration of 0. 5% of cross-linker to base were 540±47,4. 3±0. 28, 14. 4±2.4 and 18. 0±3. w; those of that with 1% 440 ±54,4.0±0.32,18. 2±3.1 and 24. 0±3. 61 with 1.5% 430±51, 4.1±0. 29, 13.6±2.2 and 25.0±2.1; with 2% 350±46, 2.5±0. 33, 9.0±2.1 and 28.0±1.9; with 2.5% 280±36, 2.0±0. 3, 11.0±2.5 and 29.0± 2.8, respectively. Conclusion: The physical properties of SY-1 silicone elastomer with a ratio of 1% of crosslinker to base are more suitable for prothesis fabrication.