逆凝聚包覆法制备硫黄调节型粉末氯丁橡胶 Ⅱ.物理性能

Preparation of sulfur-modified powdered CR by reverse-coagulation cover method:Ⅱ.Mechanical properties

考察逆凝聚包覆法制备的硫黄调节型粉末氯丁橡胶 (PCR 12 1)的门尼粘度波动对其硫化胶物理性能的影响。结果表明 ,PCR 12 1生胶的门尼粘度在 3 0～ 13 0范围内波动对其硫化胶的物理性能影响不明显 ;与块状CR12 1相比 ,PCR 12 1的加工性能和物理性能更优。对各种CR拉伸断面的形貌扫描电子显微镜观察和能谱分析结果表明 ,配合剂在PCR 12 1橡胶基体分散较好是PCR 12

The influence of the Mooney viscosity fluctuation of sulfur-modified powdered CR by reverse-coagulation cover method (PCR-121) on the physical properties of its vulcanizate was investigated.The results showed that the Mooney viscosity of PCR-121 fluctuated in the range of 30~130 had little effect on the physical properties of its vulcanizate;and PCR-121 was superior to bale CR121 in processibility and physical properties.It was found by SEM analysis and energy spectrum analysis on the tensile fractured surface of two CRs that the better dispersion of various ingredients in PCR-121 matrix resulted in superior processibility and physical properties.