| 接枝β寡肽制备强韧热塑性聚异戊二烯 |
| Preparation of Strong and Tough Thermoplastic Polyisoprene by Grafting β-oligopeptides |
| 投稿时间：2021-05-03 修订日期：2021-05-03 |
| DOI：10.12136/j.issn.1000-890X.2021.11.0803 |
| 中文关键词: 聚异戊二烯 寡肽 β-折叠片层 配位聚合 羟基 |
| 英文关键词: polyisoprene oligopeptides β-folded sheets coordination polymerization hydroxyl |
| 基金项目:国家自然科学基金资助项目（51973126） |
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| 中文摘要: |
| 通过新癸酸钕/三异丁基铝/二异丁基氯化铝稀土配位聚合，将异戊二烯（IP）单体和羟基异戊二烯衍生物（IP-OH）无规共聚得到了热塑性羟基聚异戊二烯（PIP-OH），并接枝β-丙氨酸四肽（β4A），合成了热塑性β四肽聚异戊二烯（PIP-β4A）。结果表明：β4A增强和增韧了PIP，PIP-β4A的拉伸强度为12.07 MPa，为PIP-OH拉伸强度的44.7倍；红外光谱、X射线衍射光谱以及原子力显微镜分析证明β4A在PIP基体中形成β-折叠片层，这是PIP-β4A性能优异的主要因素。 |
| 英文摘要: |
| Abstract：In this study，hydroxyl functionalized thermoplastic polyisoprene（PIP-OH） was prepared
by random copolymerization of isoprene（IP） and hydroxy isoprene derivatives（IP-OH）using rare earth
coordination polymerization catalyst Nd（VA）3/Al（i-Bu）3/Al（i-Bu）2Cl. Thermoplastic β tetrapeptide
polyisoprene（PIP-β4A） was synthesized by grafting β-alanine tetrapeptide（β4A） into PIP-OH. The results
showed that β4A enhanced the strength and toughness of PIP-OH. The tensile strength of PIP-β4A reached
12. 07 MPa，which was 44. 7 times the tensile strength of PIP-OH. In addition，Fourier transform infrared
spectrum，X-ray diffraction spectrum and atomic force microscope analysis confirmed that β4A formed
β-folded sheets in the PIP matrix，which was the main factor for the excellent performance of PIP-β4A. |
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