| 聚乙烯醇/天然橡胶共混物的结构和性能 |
| Structure and Properties of Polyvinyl Alcohol/Natural Rubber Blends |
| |
| DOI： |
| 中文关键词: 天然橡胶 聚乙烯醇 共混物 结构 性能 |
| 英文关键词: natural rubber polyvinyl alcohol blend structure property |
| 基金项目:中国热带农业科学院橡胶研究所基本科研业务费专项资金资助项目(1630022013020) |
|
| 摘要点击次数: 868 |
| 全文下载次数: 350 |
| 中文摘要: |
| 采用环氧化天然胶乳作为界面改性剂，通过胶乳共混法制备聚乙烯醇(PVA)/天然橡胶(NR)共混物，并研究其微观结构、玻璃化温度(Tg)、物理性能和热稳定性能。结果表明：PVA能较好地分散于NR中形成稳定而均匀的共混物，分散相粒径尺寸分布在0.1～1.0 μm，大部分粒径为0.5～0.8 μm。PVA的加入明显增大NR的邵尔A型硬度和撕裂强度。当PVA的用量不超过10份时，共混物的拉伸强度与NR胶料相差不大。随着PVA用量的增大，共混物的Tg呈先升高后降低趋势。当PVA的用量超过10份时，共混物的拉伸强度明显减小，热稳定性能变差，起始分解温度逐渐下降。 |
| 英文摘要: |
| By using epoxidized natural rubber latex as interfacial modifier，polyvinyl alcohol (PVA)/natural rubber (NR) blends were prepared by rubber-latex blend method，and the microstructure，glass-transition temperature (Tg)，physical properties and thermal stability of PVA/NR blends were investigated.The results showed that，PVA could be well dispersed in NR phase，the particle size of dispersion phase was in the range of 0.1～1.0 μm，and most of the particle size was 0.5～0.8 μm.The Shore A hardness and tear strength of NR compound were significantly increased by adding PVA.As the addition level of PVA was less than 10 phr，the tensile strength of the blend was similar to that of NR compound.As the addition level of PVA increased，theTg of the blend increased at first and then decreased.As the addition level of PVA was over than 10 phr，the tensile strength of the blend was significantly decreased，the thermal stability decreased，and the initial decomposition temperature gradually decreased. |
|
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
