• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Polymers and the Environment >New Thermoplastic Vulcanizate Based on Acetoacetoxy Functionalized Natural Rubber/Polyamide 12 Blend Filled with Carbon Black
【24h】

New Thermoplastic Vulcanizate Based on Acetoacetoxy Functionalized Natural Rubber/Polyamide 12 Blend Filled with Carbon Black

机译：基于乙酰乙酰氧基官能化天然橡胶/聚酰胺12混合物充满炭黑的新型热塑性硫化酸盐

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Thermoplastic vulcanizates (TPVs) based on blends of natural rubber (NR) grafted with poly(acetoacetoxyethyl methacrylate), NR-g-PAAEM, and polyamide12 (PA12) were prepared by the dynamic vulcanization technique. NR-g-PAAEM was first prepared and its surface free energy was evaluated by means of contact angles. Blends of NR-g-PAAEM and PA12 were then prepared at a 60/40 blend ratio (wt%) using a dynamic vulcanization technique. The results revealed that TPVs exhibited a dispersed-phase morphology. However, the TPVs filled with carbon black (CB) showed much smaller dispersed rubber particles when compared to the unfilled TPV. TEM analysis also revealed that the CB appeared to be mainly located within the NR-g-PAAEM phase. The presence of CB generally raised the melt viscosity and increased shear during melt-mixing, resulting in finer dispersion of the rubber particles. Additionally, a significant enhancement in the tensile properties of the TPV was also achieved by the incorporation of CB. The optimum tensile properties were attained by the addition 30 phr of CB. The results also showed that the incorporation of CB into the NR-g-PAAEM/PA12 TPVs improved their stress relaxation properties. Moreover, the effects of reprocessing on the mechanical properties of the TPV filled with CB were also investigated. Although the TPV filled with CB exhibited reprocessing capability, reprocessing at high temperature and shear forces was found to negatively affect its tensile properties, especially after the third reprocessing cycle.
机译：通过动态硫化技术制备基于接枝的天然橡胶（NR）的混合物的热塑性硫化酸盐（TPV），NR-G-Paaem和聚酰胺12（PA12）制备。首先制备NR-G-Paaem，通过接触角评估其表面自由能。然后使用动态硫化技术以60/40共混物比（wt％）制备NR-G-Paaem和Pa12的混合物。结果表明，TPV表现出分散相形态。然而，与未填充的TPV相比，填充有炭黑（CB）的TPV填充有炭黑（CB）的分散橡胶颗粒。 TEM分析还显示CB似乎主要位于NR-G-Paaem相中。 CB的存在通常在熔融混合过程中升高熔体粘度并增加剪切，导致橡胶颗粒的比较细分散。另外，通过掺入CB，还实现了TPV的拉伸性能的显着增强。通过添加30phr的Cb加入最佳拉伸性能。结果还表明，将CB掺入NR-G-Paaem / PA12 TPVs改善其应力松弛性能。此外，还研究了再处理对填充CB的TPV的机械性能的影响。尽管填充有Cb的TPV表现出再处理能力，但发现在高温和剪切力下进行再处理对其拉伸性能产生负面影响，特别是在第三再处理循环之后。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号