Influence of temperature and shear rate on the rheology and processability of reprocessed ABS in injection molding process
Influence of temperature and shear rate on the rheology and processability of reprocessed ABS in injection molding process
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DOI：
10.1016/j.jmatprotec.2008.06.013
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发表时间：
2009-03-01
影响因子：
6.3
通讯作者：
Reig, M. J.
中科院分区：
文献类型：
--
作者：
Boronat, T.;Segui, V. J.;Reig, M. J.
研究了后处理对两种丙烯腈-丁二烯-苯乙烯(ABS)级热塑性聚合物加工性能的影响。通过改变操作温度和剪切速率，在低粘度和高粘度ABS牌号的注塑成型过程中进行了再加工，并应用试验设计(DOE)技术来计划实验和随后的分析。用毛细管流变学评价了原料和再加工材料的流动性能，实验结果清楚地表明了两种聚合物在再加工过程中的性质不同。低粘度等级表明，随着加工循环次数的增加，粘度降低，从而证实了该聚合物的降解。相反，高粘度等级表明熔体粘度随着注射成型循环次数的增加而增加。已经证实，注射成型过程中施加的剪切速率不仅影响材料的行为，还影响施加温度。(C)2008爱思唯尔B.V.保留所有权利。
The effects of reprocessing on the processability, of two Acrylonitrile-Butadiene-Styrene (ABS) grade thermoplastic polymers have been investigated. Reprocessing in an injection molding process of a low and a high viscosity ABS grade has been done changing operating temperatures and shear rates, design of experiments (DOE) techniques were applied to plan experiments and later analysis. The flow properties of virgin and reprocessed materials have been evaluated by capillary rheology.Experimental results clearly indicate a qualitatively different behavior of the two polymers upon reprocessing. Low viscosity grade shows a reduction of viscosity upon increasing the number of processing cycles, thus confirming the degradation of this polymer. High viscosity grade, conversely, shows an increase of melt viscosity as the number of injection molding cycles is increased. It has been confirmed that applied shear rates in injection molding process affect material behavior as well as applied temperatures. (C) 2008 Elsevier B.V. All rights reserved.