The Tough Journey of Polymer Crystallization: Battling with Chain Flexibility and Connectivity
The Tough Journey of Polymer Crystallization: Battling with Chain Flexibility and Connectivity
复制标题
聚合物结晶的艰难历程：与链条灵活性和连接性作斗争
DOI：
10.1021/acs.macromol.8b02725
复制
发表时间：
2019-05-28
期刊：
影响因子：
5.5
通讯作者：
Li, Liangbin
中科院分区：
文献类型：
--
作者：
Tang, Xiaoliang;Chen, Wei;Li, Liangbin
高分子结晶机理的理论研究一直是高分子科学研究的重要课题。在过去的几十年里，已经提出了许多不同的，甚至相互矛盾的模型/理论。但是，没有一个能够完全满足整个社会。在这个角度来看，我们首先追溯这些模型/理论的根源回到经典和非经典成核理论。阐述了这些理论与聚合物结晶理论研究中里程碑式的理论工作之间的联系，以及它们的内在缺陷。然后介绍了新近提出的两步成核方案，无论是键取向顺序或密度波动作为前体，在我们看来，这可能会刺激聚合物结晶理论的发展。随后，由于链的柔性和连接性的聚合物结晶的特点进行了讨论。最后对聚合物结晶极限理论的发展提出了个人的看法，并对今后的研究提出了建议。
Theoretical approaches addressing the mechanism of polymer crystallization remain the great challenge in polymer science. Numerous different, or even conflicting, models/theories have been proposed during the past several decades. However, none of them can fully satisfy the whole community. In this Perspective, we first trace the roots of these models/theories back to the classical and nonclassical nucleation theories. The correlation between these theories and milestone theoretical works in polymer crystallization is elucidated together with their intrinsic drawbacks. Then the newly proposed two-step nucleation scenarios, with either bond-orientational order or density fluctuation as precursors, are introduced, which, in our view, may stimulate the development of polymer crystallization theory. Afterward, the peculiarities of polymer crystallization due to chain flexibility and connectivity are discussed. A personal outlook on the ultimate polymer crystallization theory is given at last, which is suggest...