| 双螺杆挤出改性胶粉/天然橡胶并用胶的性能研究 |
| Properties of Modified Rubber Powder by Twin-screw Extrusion/NR Blends |
| 投稿时间：2020-03-01 修订日期：2020-03-01 |
| DOI：10.12136/j.issn.1000-890X.2020.11.0839 |
| 中文关键词: 双螺杆挤出 改性 胶粉 天然橡胶 并用胶 交联网络 挤出转速 |
| 英文关键词: two-screw extrusion modification rubber powder NR blend crosslinking network extrusion speed |
| 基金项目:国家自然科学基金资助项目（51678292；51273172） |
|
| 摘要点击次数: 706 |
| 全文下载次数: 164 |
| 中文摘要: |
| 采用双螺杆挤出改性胶粉，研究挤出转速对挤出改性胶粉/天然橡胶（NR）并用胶性能的影响。结果表明：采用双螺杆挤出，在强剪切力作用下，硫化胶粉的（硫化胶）交联网络结构破坏，随着挤出转速的增大，硫化胶粉的交联密度先迅速下降后趋于稳定；挤出改性胶粉与NR并用形成的“海-岛”结构随着硫化胶粉交联网络结构打开程度的增大逐渐消失，挤出改性胶粉与NR形成了共交联网络结构；硫化胶粉交联网络破坏程度适宜时，挤出改性胶粉易与NR在硫化过程中形成交联网络，并避免硫化胶粉过度降解，从而使得并用胶获得较大的拉伸强度和拉断伸长率。 |
| 英文摘要: |
| Extruding-modified waste rubber powders（WRPs） was prepared by using two-screw extruder，and the influences of extrusion speed on the properties of WRPs/natural rubber（NR） blends were investigated. The results showed that，with the strong shear force by two-screw extruder，the crosslinking network of WRPs was wrecked. As the extrusion speed increased，the crosslinking densities of WRPs（vulcanizate） first dramatically decreased and then gradually tended to a stable value. The typical “sea-island” structure formed in the blend of extruding-modified WRPs and NR gradually disappeared according to the increasing decomposition of the WRPs’ network. A co-crosslinking network structure was formed between extruding-modified WRPs and NR.When the damage of crosslinking network of WRPs was appropriate，the crosslinking network between extruding-modified WRPs and NR was easy to form during vulcanization，and excessive degradation of WRPs was avoided，so that the WRPs/NR blends could obtain larger tensile strength and elongation at break. |
|
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
