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Crystal structure of ethene-/α-olefin copolymers with various long comonomers (C8–C26) |
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| Authors: | Florian J Stadler Tatsuhiro Takahashi Koichiro Yonetake |
| Institution: | aInstitute of Polymer Materials, Department of Materials Science, Friedrich-Alexander-University Erlangen-Nürnberg, Martensstr. 7, 91058 Erlangen, Germany;bDepartment of Polymer Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan;cChonbuk National University, School of Semiconductor and Chemical Engineering, 664-14, 1-ga Deokjin-dong, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea |
| Abstract: | Ethene-/α-olefin copolymers having a wide range of comonomers between 8 and 26 carbon atoms in length were characterized by wide angle X-ray diffraction (WAXD). It was found that the crystallinities for the shorter comonomers (C8, C12) matched fairly well with the crystallinities from DSC and volumetric measurements, while for the longer comonomers (C18, C26) distinct differences between the three methods were found. This was explained by the presence of an additional crystalline phase of the side chains slightly deforming the amorphous peak. |
| Keywords: | Ethene-/α-olefin copolymers Wide angle X-ray diffraction (WAXD) Lattice parameters Cooling conditions |
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