| 1,2-PBR和BR对EPDM硫化和力学性能的影响 |
| Influence of 1，2-PBR and BR on curing behavior and physical properties of EPDM |
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| DOI： |
| 中文关键词: EPDM BR 1,2-聚丁二烯橡胶 并用 |
| 英文关键词: EPDM BR 1,2-PBR blend |
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| 中文摘要: |
| 考察了过氧化物硫化体系和硫黄硫化体系EPDM/1，2聚丁二烯橡胶（1，2-PBR）和EPDM/BR并用胶的硫化特性、交联密度和物理性能。结果表明：采用过氧化物硫化体系时，EPDM与1，2-PBR和BR并用后，硫化胶的交联密度、100%定伸应力、邵尔A型硬度和撕裂强度增大，且前者的增幅较大；采用硫黄硫化体系时，1，2-PBR和BR均可提高EPDM的硫化速率，且随着1，2-PBR用量的增大，硫化胶的交联密度、100%定伸应力和邵尔A型硬度略有减小，拉伸强度和撕裂强度增大，而随着BR用量的增大，硫化胶的100%定伸应力和拉伸强度明显减小。通过差示扫描量热分析发现：过氧化物硫化体系中，EPDM/1，2-PBR并用胶中EPDM和1，2 PBR的共硫化程度较大。 |
| 英文摘要: |
| The curing behavior，the crosslinking density and the physical properties of EPDM/1，2-PBR and EPDM/BR blends cured with the peroxide curing system and the sulfur curing system respectively were investigated. The results showed that the crosslinking density，the modulus at 100% elongation，the Shore A hardness and the tear strength of EPDM/1，2-PBR and EPDM/BR cured with the peroxide curing system increased，and those of EPDM/1，2-PBR increased mo re significantly；the cure rate of EPDM was increased by blending with 1，2-PBR or BR when cured with the sulfur curing system，and the crosslinking density，the modulus at 100% elongation and the Shore A hardness of the vulcanizate decreased slightly as the proportion of 1，2-PBR increased，the modulus at 100% elongation and the tensile strength of the vulcanizate decreased significantly as the proportion of BR increased. It was found by DSC that the better covulcanization of EPDM/1，2-PBR blend was obtained with the peroxide curing system. |
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