Yujie Kang , Yangming Zou , Xinqi Di, Jing Yang, Jun Sun, Hongfei Li, Xiaoyu Gu, Sheng Zhang
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引用次数: 0
Abstract
PC/ABS alloy is widely used because of its excellent impact strength, size stability, and easy processability. However, it is a dilemma to simultaneously maintain good flame retardancy and mechanical performance. In this work, a combined filler system composed of hydroquinone bis(diphenyl phosphate) (HDP) and polydimethylsiloxane (PDMS) is used to cope with this trouble. By use of 8 wt. %HDP/4 wt. % PDMS in PC/ABS (80/20), the sample achieves a UL-94 V-0 rating and a limiting oxygen index (LOI) of 26.0 %, and the flame retardancy is mostly kept even after water immersion, ascribed to the good hydrophobicity of PDMS. The synergistic flame retardancy action of HDP/ PDMS should be their promotion on charring, that is quantificationally documented from the residue left in the TGA test. The impact strength of the PC/ABS sample containing 8 wt. %HDP/4 wt. % PDMS is 18.8 KJ/m2, about 4 times higher than the impact strength of PC/ABS/12 wt. % HDP. After soaking in water for 7 days, the impact strength drops to 8.8 KJ/m2 and 1.2 KJ/m2, respectively. Comparatively, the severe loss on impact strength by using HDP is mitigated by partial substitution by PDMS, even after soaking in water. This work tries to find feasible solutions referring to flame retardancy and mechanical performance in PC/ABS alloy.
期刊介绍：
Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology.
Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal.
However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.
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