Influence of60Co γ-Ray irradiation on the morphology of crystalline polyethylene studied by high-resolution solid-state13C NMR

✍ Scribed by Zhu Qing-Ren; He Ping-Sheng; F. Horii; R. Kitamaru

• Publisher: Springer
• Year: 1996
• Tongue: English
• Weight: 562 KB
• Volume: 31
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00354658

✦ Synopsis

The relationship and influence of varying 6~ ~/-ray irradiation doses, in the range 0.77-5.2 MGy, on the morphology of polyethylene have been investigated using high-resolution solid-state 13C nuclear magnetic resonance analyses through variation of different phase components, TIc, 7"20 relaxation parameters, and line width. The cross-linking in the irradiated polyethylene takes place mainly in the non-crystalline regions. However, distortion and damage to the folded chain of the crystal lattice are observed in the crystalline regions. For the interfacial phase, both cross-linking and distortion could occur. As a result, part of the crystalline component transformed into a non-crystalline one. It was also found that the orthorhombic crystalline lattice transformed into a monoclinic one within the crystalline phase in polyethylene under higher doses of irradiation.