Contribution to the ultrasonic degradation of polystyrene solutions
作者： J Niezette , A Linkens
DOI: 10.1016/0032-3861(78)90202-1
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摘要: Abstract Narrow fractions of polystyrene and more heterogeneous samples were subjected to ultrasonic irradiation in tetrahydrofuran toluene. Degraded products investigated by gel permeation chromatography. Compared with Ovenall's results, the kinetic analysis degradation process shows an additional effect molecular weight on rate. Experimental chromatograms obtained classical styragel columns do not reveal clearly non-random character degradation. However, bimodal distribution curves characteristic a chain scission near centre molecule are observed for degraded very narrow analysed high resolution microstyragel packings. It appears that breakage does occur exclusively but probability rupture decreases rapidly out central part chain.
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