| 三元乙丙橡胶J-4090和6950C的结构与性能研究 |
| Study on Structures and Properties of EPDM J-4090 and 6950C |
| 投稿时间：2021-12-13 修订日期：2021-12-13 |
| DOI：10.12136/j.issn.1000-890X.2023.04.0272 |
| 中文关键词: 三元乙丙橡胶 海绵密封条 密实胶 发泡胶 微观结构 物理性能 发泡特性 挤出胀大比 |
| 英文关键词: EPDM sponge sealing strip dense compound foamed compound microstructure physical property foaming characteristic extrusion swell ratio |
| 基金项目: |
|
| 摘要点击次数: 1143 |
| 全文下载次数: 2836 |
| 中文摘要: |
| 研究2种应用于汽车海绵密封条的牌号为J-4090和6950C的三元乙丙橡胶（EPDM）的微观结构及其复合材料（包括密实胶和发泡胶）的性能。结果表明：与EPDM 6950C相比，EPDM J-4090的乙烯基质量分数较大，第三单体（亚乙基降冰片烯）质量分数较小，相对分子质量分布较宽；与EPDM 6950C密实胶相比，EPDM J-4090密实胶的硫化速率和交联密度较小，抵抗变形的能力较差，硫化体系用量增大20%的EPDM J-4090密实胶的物理性能达到EPDM 6950C密实胶一致的水平。与EPDM 6950C发泡胶相比，硫化剂和促进剂用量增大20%的EPDM J-4090发泡胶的挤出膨胀比略大，发泡特性和物理性能相近。 |
| 英文摘要: |
| The microstructures of two brands of EPDM（J-4090 and 6950C） used in automobile sponge
sealing strips and the properties of their composites（including dense compound and foamed compound）
were studied. The results showed that，compared with EPDM 6950C，EPDM J-4090 had larger vinyl mass
fraction，smaller mass fraction of the third monomer（ethylidene norbornene） and wider molecular weight
distribution. Compared with EPDM 6950C dense compound，EPDM J-4090 dense compound had lower
vulcanization rate and crosslinking density，and poor resistance to deformation. However，when the amount
of the vulcanization system in EPDM J-4090 dense compound increased by 20%，its physical properties
could reach the same level as that of EPDM 6950C dense compound. Compared with EPDM 6950C foamed
compound，the extrusion swell ratio of the EPDM J-4090 foamed compound with 20% increase in the amount
of the vulcanization system was slightly larger，and the foaming characteristics and physical properties were
similar. |
|
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
