Ethylene terephthalate, effect radiation

Figure 4. Effect of radiation on the poly(ethylene terephthalate-co-2,6-naphthalene-dicarboxylate) yarns mole % of 2,6-DMN (%) 0.0 (X) 0.5 fA) 1-0 (O) 2.0 ...

Measurements of the frequency and temperature dependence of the H T, in poly(dimethyl siloxane) revealed relaxations due to methyl rotation and segmental motions and also an oxygen impurity effect The experimental data could not be fitted using thermally activated Arrhenius behaviour, as was also true of backbone motions in poly(vinyl chloride). " Multiple side-group motions have also been observed in poly (diethyl siloxane) and poly(L-histidine). Backbone motions have been observed in poiy(diethyl siloxane), poly(oxymethylene), poly(ethylene terephthalate), poly(p-phenylene sulphide), aromatic polyamides, and PTFE. A close similarity between the effects of entanglements and radiation cross-linking on the of cis-polyisoprene has been found. ... 

Fig. 4.7. Effect of UV radiation on the relative permeability coefficient of poly(ethylene terephthalate) membranes at 323 K [1463]. (Reproduced from Mercea, P. et ai, Polym. Commun., 28, 31, by permission of the publishers, Butterworth Heinemann Ltd. 1987.)...

The effect of UV radiation in air on the wettability of thin films of polyvinyl chloride (Fig. 10.106) poly(methyl methacrylate), poly(n-butyl methacrylate), poly(ethylene terephthalate) and polystyrene (Fig. 10.107) show that the changes in contact angle for various liquids with irradiation time are a function of the nature of the polymer [667]. 

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