Deformation mechanism of ‘hard elastic polyethylene films’☆
Deformation mechanism of ‘hard elastic polyethylene films’☆
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DOI：
10.1016/0032-3861(76)90008-2
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发表时间：
1976-12
期刊：
影响因子：
4.6
通讯作者：
T. Hashimoto;Kikuo Nagatoshi;A. Todo;H. Kawai
中科院分区：
文献类型：
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作者：
T. Hashimoto;Kikuo Nagatoshi;A. Todo;H. Kawai
采用压延机制造方法制备了超高分子量线性聚乙烯（商品级，Sholex super 5551 H和4551 H）以及普通高分子量和中等分子量聚乙烯（商品级，Hizex 7000 F和Sholex 4002）的薄膜样品，其中涉及到应力聚合物熔体结晶的重要加工问题。由超高分子量聚乙烯结晶的薄膜，与由低分子量聚乙烯结晶的薄膜相比，在沿着机器方向拉伸时发生了较大的弹性变形，具有所谓的“排结构”或“硬弹性结构”的特定形态特征。采用小角、广角x射线散射、衍射以及电子显微镜等手段研究了硬弹性薄膜亚微观结晶上层结构的变形机理。
Film specimens were prepared from extra-high molecular weight linear polyethylene (commercial grade, Sholex super 5551 H and 4551 H) as well as ordinary high and medium molecular weight polyethylenes (commercial grade, Hizex 7000 F and Sholex 4002) by using a calender manufacturing method, which involves the important processing problem of crystallization from a stressed polymer melt. The films crystallized from the extra-high molecular weight polyethylene, as compared with those crystallized from the lower molecular weight polyethylene, underwent a large elastic deformation on stretching along the machine direction, characteristic of the specific morphology of the so-called ‘row structure’ or ‘hard elastic structure’. Deformation mechanism of the submicroscopic crystalline superstructure of the hard elastic films was investigated by means of small- and wide-angle X-ray scattering and diffraction, as well as electron microscopy.