• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ACS Macro Letters >Ring-Opening Metathesis Polymerization of delta-Pinene: Well-Defined Polyolefins from Pine Sap
【24h】

Ring-Opening Metathesis Polymerization of delta-Pinene: Well-Defined Polyolefins from Pine Sap

机译：δ-PINENE的开环复分解聚合：松树液中明确定义的聚烯烃

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

Well-controlled ring-opening metathesis polymerization (ROMP) of delta-pinene is reported. The monomer is produced through a facile, metal-free, three-step synthesis from highly abundant and sustainable alpha-pinene. Using Grubbs third-generation catalyst, delta-pinene undergoes ROMP to high conversion (>95%) with molar mass up to 70 kg mol(-)(1) and narrow dispersity (<1.2). A highly regioregular propagation mechanism was concluded by NMR spectroscopic analysis that revealed a head-to-tail (HT, >95%) microstructure and high trans content (>98%). Successful ROMP is corroborated with density functional theory calculations on delta-pinene's ring strain energy (similar to 35 kJ mol(-1)). Poly(5-pinene) has a high glass transition temperature (similar to 104 degrees C) and a unique chiral microstructure bearing gem-dimethylcydobutane rings. Controlled ROMP also allowed the synthesis of block copolymers containing segments of poly(delta-pinene and polynorbornene which are discussed. Finally, bulk polymerization of delta-pinene is possible, indicating a greener approach to these materials, albeit with some loss of control.
机译：None

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