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首页> 外文期刊>Journal of Applied Polymer Science >SELECTIVE CROSSLINKING REACTION IN POLYMER BLENDS .3. THE EFFECTS OF THE CROSSLINKING OF DISPERSED EPDM PARTICLES ON THE IMPACT BEHAVIOR OF PP/EPDM BLENDS
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SELECTIVE CROSSLINKING REACTION IN POLYMER BLENDS .3. THE EFFECTS OF THE CROSSLINKING OF DISPERSED EPDM PARTICLES ON THE IMPACT BEHAVIOR OF PP/EPDM BLENDS

机译：聚合物混合物中的选择性交联反应.3。分散的EPDM颗粒的交联对PP / EPDM共混物冲击行为的影响

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摘要

The selective dynamic crosslinking reaction by means of the N,N'-m-phenylene-bismaleimide/ poly-(2,2,4-trimethyl-1,2-dihydroquinoline) system was carried out on PP/EPDM blends and its effect on the Izod impact strength (IIS) was investigated. Three series of PP/EPDM combinations were adopted to establish different morphologies. In each series, the EPDM wt% varied from 5 to 30 at 5 wt% intervals. The system crosslinked the EPDM particles selectively without PP degradation and change of morphology. Following the crosslinking, the IIS at 23, -10, and -30 degrees C increased in all blends, and the critical EPDM wt% at 23 degrees C necessary to cause the dramatic IIS increase was lowered. The increase in interfacial adhesion is considered to be the most important factor necessary for the improvement. The nucleation effect of the crosslinked particles and the decrease of crystallinity of the EPDM were also considered to contribute to the improvement in the IIS. Impact fracture energy absorption can thus be changed by adjusting the magnitude of the interfacial adhesion by the dynamic crosslinking even at essentially the same morphology. (C) 1995 John Wiley and Sons, Inc. [References: 30]
机译：通过N，N'-间亚苯基-双马来酰亚胺/聚-（2,2,4-三甲基-1,2-二氢喹啉）体系进行选择性动态交联反应，并对其影响进行了研究。研究了悬臂梁式冲击强度（IIS）。采用三个系列的PP / EPDM组合来建立不同的形态。在每个系列中，EPDM wt％以5 wt％的间隔从5到30变化。该系统选择性地使EPDM颗粒交联，而不会降解PP和形态。交联后，所有共混物中23，-10和-30摄氏度下的IIS均增加，导致IIS急剧增加所需的23摄氏度下的临界EPDM wt％降低了。界面粘附力的增加被认为是改善这种情况最重要的因素。还认为交联颗粒的成核作用和EPDM结晶度的降低有助于改善IIS。因此，即使在基本相同的形态下，也可以通过动态交联来调节界面粘附力的大小来改变冲击断裂能的吸收。 （C）1995 John Wiley and Sons，Inc. [参考：30]

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