硫黄硫化体系对三元乙丙橡胶硫化特性及硫化胶性能的影响
研究了促进剂与硫黄的质量比（A/S）对硫黄硫化体系三元乙丙橡胶（EPDM）的硫化特性、交联网络结构、动态力学性能以及物理机械性能的影响。结果表明，随着有效硫含量的增加， EPDM混炼胶的焦烧时间和正硫化时间缩短；在有效硫含量相同时，焦烧时间随着促进剂用量的增加而逐渐减小，硫化程度无明显差别。随A/S值增大，EPDM硫化胶的交联密度增大，相应地力学性能得以改善；但促进剂用量较高时交联密度反而下降，A/S为3.7时交联密度达到最佳。动态力学性能分析结果显示，随着单硫和双硫键含量的升高，储能模量下降得越发明显，损耗因子对应变的依赖性越大。...
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| Published in | 合成橡胶工业 Vol. 37; no. 4; pp. 299 - 303 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
青岛科技大学 橡塑材料与工程教育部重点实验室,山东 青岛,266042
2014
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-1255 |
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| Summary: | 研究了促进剂与硫黄的质量比（A/S）对硫黄硫化体系三元乙丙橡胶（EPDM）的硫化特性、交联网络结构、动态力学性能以及物理机械性能的影响。结果表明，随着有效硫含量的增加， EPDM混炼胶的焦烧时间和正硫化时间缩短；在有效硫含量相同时，焦烧时间随着促进剂用量的增加而逐渐减小，硫化程度无明显差别。随A/S值增大，EPDM硫化胶的交联密度增大，相应地力学性能得以改善；但促进剂用量较高时交联密度反而下降，A/S为3.7时交联密度达到最佳。动态力学性能分析结果显示，随着单硫和双硫键含量的升高，储能模量下降得越发明显，损耗因子对应变的依赖性越大。 |
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| Bibliography: | ethylene propylene diene monomer;sulfur;curing system;effective sulfur content;curing characteristics;crosslinking density;mechanical property 62-1036/TQ DING Ying, WANG He, ZHAO Shu-gao （ Key Laboratory of Rubber-plastics of Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China） The effect of mass ratio of accelerator to sulfur （ A/S） on curing characteristics , crosslinking network structures , mechanical and dynamic mechanical properties of sulfur curing system based ethylene propylene diene monomer （ EPDM ） was researched.The results showed that with the increase of effective sulfur content , both the scorch time and curing time decreased; at the same effective sulfur content , scorch time was gradually decreased with increasing accelerator.When the A/S increased , the crosslinking density increased , thus correspondingly improving the mechanical properties.On the contrary , much more accelerator decreased the crosslinking density , and the optimum crosslinking density wa |
| ISSN: | 1000-1255 |