Abstract
FT-IR spectra of UHMW-PE tapes with different moduli have been studied in dependence of mechanical deformation and stress. Small spectral variations have been revealed in the difference spectra. Band shifts of the 730/720 cm−1 doublet have been observed under stress relaxation and upon stretching. A clear correlation between the shift of crystalline bands and the Young's modulus could be determined. Polarized measurements demonstrated variations in the mechanical response of nearly perfectly oriented and non-oriented crystallites. Crosslinking was performed by blending the polyethylene with 10% polysilane and UV-irradiation of the drawn material. The band shift increases as the linkage between oriented crystal blocks is improved with higher draw ratios and chemical crosslinking.
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Sheiko, S., Frey, H. & Möller, M. FT-IR studies on the mechanical response of the crystalline fraction in ultrastrong polyethylene tapes. Colloid Polym Sci 270, 440–445 (1992). https://doi.org/10.1007/BF00665987
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DOI: https://doi.org/10.1007/BF00665987