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Structure Evolution and Deformation Behavior of Polyethylene Film during Biaxial Stretching.
ACS Omega ( IF 3.7 ) Pub Date : 2019-12-27 , DOI: 10.1021/acsomega.9b03250
Qiang Chen 1 , Zhiwei Wang 1 , Sumei Zhang 1 , Ya Cao 1 , Jinyao Chen 1
Affiliation  

The structure evolution and deformation behavior of tenter-frame biaxially oriented polyethylene (TF-BOPE) films were investigated in this study. For sequential biaxial stretching, the original spherulites were broken into small pieces, and the fibrillar structure simultaneously formed during the machine direction (MD) stretching. Subsequently, the single fibrils were pulled away, and some fine fibrils developed via partial melting-recrystallization or lamellar rearrangement during the transverse direction (TD) stretching, which leads to the formation of the vein structure and nanosized fiber-like network. For simultaneous biaxial stretching, the fractured lamellae and the newly formed crystals were evenly distributed in the MD-TD plane like an isotropous fibrillar network. Moreover, compared with the unstretched sample, both films could achieve up to about 2 times the tensile modulus and 4.5 times the tensile strength and also exhibited the superior optical property.

中文翻译:

聚乙烯薄膜双轴拉伸过程中的结构演变和变形行为。

研究了拉幅架双轴取向聚乙烯(TF-BOPE)薄膜的结构演变和变形行为。对于顺序双轴拉伸,将原始球晶破碎成小块,并在纵向(MD)拉伸过程中同时形成原纤维结构。随后,将单根原纤维拉开,并在横向(TD)拉伸过程中通过部分熔融-再结晶或层状重排形成了一些细原纤维,这导致了静脉结构和纳米级纤维状网络的形成。为了同时进行双轴拉伸,断裂的薄片和新形成的晶体像各向同性的原纤维网络一样,均匀地分布在MD-TD平面上。而且,与未拉伸样品相比,
更新日期:2020-01-14
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