• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Effects of polycaprolactone molecular weights on thermal and mechanical properties of polybenzoxazine
【24h】

Effects of polycaprolactone molecular weights on thermal and mechanical properties of polybenzoxazine

机译：聚己内酯分子量对聚苯并恶嗪热力学性能的影响

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

Polymer blends of polybenzoxazine (PBA-a) and polycaprolactone (PCL) of different molecular weights (M-n=10,000, 45,000, and 80,000 Da) were prepared at various PBA-a/PCL mass ratios and their properties were characterized. The results from dynamic mechanical analyzer (DMA) revealed two glass transition temperatures implying phase separation of the two polymers in the studied range of the PCL contents. Moreover, a synergistic behavior in glass transition temperature (T-g) was evidently observed in these blends with a maximum T-g value of 281 degrees C compared with the T-g value of 169 degrees C of the PBA-a and about -50 degrees C of the PCL used. The blends with higher M-n of PCL tended to provide greater T-g value than those with lower M-n of PCL. The modulus and hardness values of PBA-a were decreased while the elongation at break and area under the stress-strain curve were increased with an increase of the content and M-n of PCL, suggesting an enhancement of toughness of the PBA-a. Scanning electron micrographs (SEM) of the sample fracture surface are also used to confirm the improvement in toughness of the blends. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41915.
机译：在各种PBA-a / PCL质量比下，制备了不同分子量（M-n = 10,000、45,000和80,000 Da）的聚苯并恶嗪（PBA-a）和聚己内酯（PCL）的聚合物共混物，并对其性质进行了表征。动态力学分析仪（DMA）的结果表明，在所研究的PCL含量范围内，两个玻璃化转变温度暗示了两种聚合物的相分离。此外，在这些共混物中，明显观察到玻璃化转变温度（Tg）的协同行为，其最大Tg值为281℃，而PBA-a的Tg值为169℃，PCL约为-50℃。用过的。具有较高PCL M-n的共混物比具有较低PCL M-n的共混物具有更大的T-g值。随着PCL含量和M-n的增加，PBA-a的模量和硬度值降低，而断裂伸长率和应力-应变曲线下的面积增加，表明PBA-a的韧性增强。样品断裂表面的扫描电子显微照片（SEM）也用于确认共混物韧性的提高。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41915。

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