Degradation of monodisperse polystyrene in a fast transient extensional flow

被引：0
|
作者：
Clay, JD [1 ]
Koelling, KW [1 ]
机构：
[1] Ohio State Univ, Dept Chem Engn, Columbus, OH 43210 USA
来源：
CONFERENCE PROCEEDINGS AT ANTEC '98: PLASTICS ON MY MIND, VOLS I-3: VOL I; PROCESSING, VOL II; SPECIAL AREAS, VOL III; MATERIALS | 1998年 / 44卷
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D O I：
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中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Extensional flows are highly effective in deforming coiled polymer chains and can cause chain scission, especially in entangled systems. This study analyzes the effect of concentration and solvent viscosity on extensional degradation. Narrow molecular weight distribution (M-w/M-n = 1.03) polystyrene samples are dissolved in two different solvents: 1-methyl-naphthalene and polystyrene oligomer. Polymer concentration is varied to obtain solutions in the dilute, semidilute, and concentrated regimes: The solutions are subjected to a fast transient extensional flow in an opposed pistons apparatus. Chain scission is measured using gel permeation chromatography. Degradation is related to the flow field and extensional rheology of the solutions.
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页码：977 / 980
页数：4
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