The crystallization of poly(ε-caprolactone) (PCL) and isotactic polypropylene (iPP) infiltrated in nanoporous anodic alumina oxide (AAO) templates was reexamined to demonstrate the importance of obtaining polymer-free, clean AAO surfaces on the nucleation, size dependence of crystallization temperature (T_c), and texture. The AAO pore diameters cover a broad range from 400 to 20 nm. When the AAO templates were completely free of any residual polymer on their surfaces, differential scanning calorimetry (DSC) experiments exhibited a single crystallization peak for all the samples with different AAO pore sizes. A drastic decrease in T_c with density of domains indicated a transition from heterogeneous to homogeneous/surface nucleation. A regular decrease of T_c with pore size was observed in the low T_c regime, as a result of the volume dependence of nucleation events. The chain alignment of the two polymers infiltrated in AAO was studied by two-dimensional wide-angle X-ray scattering (WAXS). By comparing the experimental and simulated WAXS patterns, the orientation modes of the polymers were identified and compared with previous studies.

中文翻译：

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在硬禁闭条件下重新检查聚（ε-己内酯）和全同立构聚丙烯的结晶：成核和取向

重新检查了渗透到纳米多孔阳极氧化铝（AAO）模板中的聚（ε-己内酯）（PCL）和全同立构聚丙烯（iPP）的结晶，以证明获得无聚合物，干净的AAO表面成核的重要性，尺寸的依赖性结晶温度（T _c）和织构。AAO的孔径范围从400到20 nm。当AAO模板的表面上完全没有残留聚合物时，差示扫描量热法（DSC）实验显示所有具有不同AAO孔径的样品均具有一个结晶峰。T _c随域密度的急剧降低表明从异质向均匀/表面成核的过渡。定期减少Ť _Ç在低，观察到用孔径Ť _Ç制度，成核事件的体积依赖性的结果。通过二维广角X射线散射（WAXS）研究了渗透到AAO中的两种聚合物的链排列。通过比较实验和模拟的WAXS模式，可以确定聚合物的取向模式，并将其与以前的研究进行比较。