Abstract
Small-angle x-ray scattering (SAXS) was used to determine density fluctuation in radiation-induced crosslinked polyethylene of varying degrees of crystallinity. Density fluctuation FL decreases with increasing crystallinity, while it increases linearly with increasing radiation dose or degree of crosslinking. By means of extrapolation, density fluctuations in the crystalline and the amorphous phasesFL c andFL a were obtained. At a given dose,FL a is greater thanFL c . The increase inFL a with radiation is found to be much greater than that ofFL c compared with the initial values at 0 Mrad,FL c showing only a negligible increase event at 312 Mrad. The present findings suggest that crosslinks are not introduced within the crystalline phase; they take place primarily in the noncrystalline phase, in agreement with the conclusions reached previously on the basis of changes in crystalline and amorphous densities in irradiated polyethylene.
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References
Yeh GSY, Chen CJ, Boose DC (1985) Colloid & Polymer Sci 263:109
Chen CJ, Boose DC, Yeh GSY (1990) ibid. etc., submitted for publication to Colloid & Polymer Sci
Guinier A, Fournet G (1955) Small-Angle Scattering of X-rays, Wiley, New York
Wendorff JH, Fischer EW (1973) Kolloid Z Polym 251:876
Ratbje J, Ruland W (1976) Colloid & Polym Sci 254:358
Porod G (1951) Kolloid Z. A. 124:83
Ruland W (1971) J Appl Cryst 4:70
Perret R, Ruland W (1971) Kolloid Z. Polym 247:835
Levelut AM, Guinier A (1967) Bull Soc Miner Crist 40:445
Hendrick RW, Schmidt PW (1967) Acta Phys Austriaca 26:97; 37:20 (1973)
Harget PJ, Siegmann A (1972) J Appl Phys 43:4357
Debye P, Anderson HR, Bueche A (1957) J Appl Phys 28:679
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Dedicated to Prof. Dr. W. Pechhold on the occasion of his 60th birthday
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Chen, C.J., Yeh, G.S.Y. Radiation-induced crosslinking: III. Effect on the crystalline and amorphous density fluctuations of polyethylene. Colloid Polym Sci 269, 353–363 (1991). https://doi.org/10.1007/BF00654582
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DOI: https://doi.org/10.1007/BF00654582