Polymer crystallization in 25-nm spheres
Polymer crystallization in 25-nm spheres
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DOI：
10.1103/physrevlett.84.4120
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发表时间：
2000-05-01
影响因子：
8.6
通讯作者：
Ryan, AJ
中科院分区：
文献类型：
--
作者：
Loo, YL;Register, RA;Ryan, AJ
用时间分辨X射线散射研究了嵌段共聚物中间相的离散球内的结晶。立方堆积的微区，建立在熔体中的自组装，保持整个结晶强烈的块间偏析，即使非晶基体块是远高于其玻璃化转变温度。每个球内的均匀成核产生等温结晶，遵循一级动力学，与通常表现出的S形动力学的本体聚合物的静态结晶形成对比。
Crystallization within the discrete spheres of a block copolymer mesophase was studied by time-resolved x-ray scattering. The cubic packing of microdomains, established by self-assembly in the melt, is preserved throughout crystallization by strong interblock segregation even though the amorphous matrix block is well above its glass transition temperature. Homogeneous nucleation within each sphere yields isothermal crystallizations which follow first-order kinetics, contrasting with the sigmoidal kinetics normally exhibited in the quiescent crystallization of bulk polymers.