随着传统高分子所依赖的石化资源日益枯竭，生物质高分子材料倍受关注。植物油是一种重要的可再生资源，已被广泛用于高分子材料的制备。植物油高分子链柔顺、缠结难和自增塑的特点使其成为高回弹力热塑性弹性体软段的理想选择，然而目前所合成的植物油基热塑性弹性体回弹力不足。本项目将在前期高效方法合成植物油单体和活性自由基聚合方法制备三嵌段热塑性弹性体的基础上，结合活性自由基聚合和开环聚合设计制备一系列基于植物油和乳酸的高回弹力热塑性弹性体。研究聚合条件对热塑性弹性体分子链结构均一性和回弹力的影响，分析植物油软段分子量及玻璃化转变温度与弹性体回弹力之间的相互关系，探讨不同分子链结构对弹性体微相分离行为、流变特性及力学性能的作用机制，阐明植物油作为软段在热塑性弹性体中的关键作用，提出植物油基热塑性弹性体高回弹力形成的机理。本项目的实施将为设计制备植物油基热塑性弹性体提供理论基础和创新思路。

As feedstocks for the preparation of chemicals, renewable resources have become an important competitor to fossil resources with the foreseeable depletion of petroleum feedstocks and increased demand for biodegradable and sustainable products. Plant oils are important biomass and have been widely used in chemical industry. Although plant oils based polymer, such as thermoset resins and thermoset elastomers, are developed. Their applications are still limited due to the lack of high efficient monomer preparation and well-defined thermoplastic macromolecule design methods. Recently, the author have developed a novel method to synthesize mono-functional soybean oil monomers, and designed soybean oil based triblock thermoplastic elastomers via living/controlled free radical polymerization. Herein, triblock and multi-graft high resilient thermoplastic elastomers derived from soybean oil and lactide will be developed via the combination of living/controlled free radical polymerization and ring-opening polymerization. We will study the chain entanglement behavior, rheological properties, and mechanical properties of these high resilient thermoplastic elastomers, highlight the structure-property relationships. This should help us to uncover knowledges on how to design and prepare plant oil based thermoplastic polymers, which will reduce the environment problems and food safety concerns caused by waste oils.