摘要
用抽提法、流变仪、示差扫描量热仪、热重法、动态粘弹谱仪、扫描电镜等仪器研究了ＮＲ／ＨＤＰＥ共混热塑性弹性体（ＴＰＥ）的结构与性能。实验结果表明，动态和静态硫化共混物的交联程度相近。控制ＮＲ的交联程度可改善共混物的流动性。ＮＲ／ＨＤＰＥ共混热塑性弹性体中、ＨＤＰＥ结晶度则随ＮＲ的增加而略微降低。只要ＨＤＰＥ足以包裹胶胶粒子就可以形成连续相。动态硫化增加了共混物中ＮＲ与ＨＤＰＥ相界面间的结合力。
The styucture and properties of thermoplastic elastomer from NR/HDPE blends were studied by extraction,rheometer; differential scanning calorimeter, therermogravimetry, dynamic viscoelsisty spectra,scanning electronic microscope et al.The experimental rusults show that the cross-linking density of dynamic and static Vulcanizing blends is close. The control cross-linking density of NR can improve flow properties of thermoplastic elastomer from NR/HDPE blends.The degree of crystallization of HDPE in thermoplastic elastomer from NR/HDPE blends reduces slightly with increasing NR content.HDPE can become continuous phase when rubber particles is wrapped up by enough HDPE.The combination Power of phase surface between NR and HDPE in blends can be enhanced by dynamic Vulcanization.
关键词
热塑性弹性体
共混物
天然橡胶
高密度聚乙烯
thermoplastic elastomer,blends,native rubber,high density polyethylene,structure and properties
