writer：Yunbao Gao, Zonglin Jiang, Jianing Zhang, Haiying Tan, Jing Jin, Wei Jiang
keywords：聚合物增韧, 脆韧转变, 聚合物增强, 刚韧平衡, 核壳橡胶粒子
source：期刊
specific source：Polymer Science & Technology, 2025, 1(4), 314-329
Issue time：2025年

摘要：韧性和刚度是决定聚合物能否用作工程材料的两个参数，因此聚合物增韧和增强一直是高分子科学与工程中持续受关注的重要课题。聚合物的脆韧转变（BDT）在高抗冲聚合物制备及其应用中具有重要而特殊的作用，因为临界BDT点是设计韧性聚合物的参考点，也是其作为韧性材料使用的极限点；同时，BDT点还决定增韧聚合物韧性与刚性的平衡。本综述首先总结了影响粒子增韧热塑性塑料BDT的形貌、增韧粒子和基体聚合物性质、温度以及变形速度等因素，随后系统详细介绍临界BDT点处这些因素关系的模型和理论，最后介绍和讨论了基于脆韧转变模型和理论设计制备刚韧平衡高抗冲聚合物复合材料的最新进展。

Abstract：Toughness and stiffness are two parameters that determine whether a polymer can be used as an engineering material. Therefore, polymer toughening and stiffening have been continuously attractive and important topics for both polymer science and engineering. The brittle-ductile transition (BDT) of a polymer plays an important and special role in high-impact polymer preparation and its application because the critical BDT point is the reference point for designing a ductile polymer and the limit point for its application as a ductile material. Moreover, the BDT point also determines the balance between the toughness and rigidity of toughened polymers. In this review, factors such as morphology, properties of the toughening particles and matrix polymer, temperature, and deformation speed that can affect the BDT of particle-toughened thermoplastics are first summarized. Subsequently, the model and theory concerning the relationships among these factors at the critical BDT point are systematically introduced in detail. Finally, recent progress in designing and preparing high-impact polymer composites with balanced toughness and rigidity on the basis of the model and theory of the brittle-ductile transition is introduced and discussed.

论文链接：https://doi.org/10.1021/polymscitech.5c00023