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首页> 外文期刊>Journal of Applied Polymer Science >Effect of Coupling Agents on the Degradation of Polypropylene/Fly Ash Composites
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Effect of Coupling Agents on the Degradation of Polypropylene/Fly Ash Composites

机译：偶联剂对聚丙烯/粉煤灰复合材料降解的影响

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摘要

Composites containing 50% wt fly ash (sourced from the UK and South Africa) in polypropylene homopolymer (manufacturer stabilized for general purpose use) have been prepared by using batch and continuous methods. The effect of the following coupling agents were investigated on the photo- and thermal-decomposition of the composite materials: Lubrizol Solplus C800 (an unsaturated carboxylic acid), γ-methacryloxypropyl trimethoxy silane (c-MPS), 1,3-phenylene dimaleimide (BMI), and maleic anhydride-grafted-polypropylene (m-PP). High melt, thermal-, and photo-stability was favored when the matrix was coupled to the filler surface by monomeric coupling agents that were expected to adsorb in a close packed layer on the fly ash surface. Further improvements were observed in cases where the coupling agent could also self-polymerize. m-PP did not lead to increased stability due to its low adsorption density on the fly ash surface. The relatively high water/acid soluble transition metal ion content of the UK sourced fly ash did not appear to affect stability under the test conditions employed in this study. The South African sourced fly ash had a higher level of quartz and mullite together with a high level of group 1 and 2 metals. The latter in particular may have led to debonding of the coupled interfacial region from the filler surface and possible adsorption of stabilizers on the pristine surface. This resulted in the South African fly ash generally possessing poorer resistance to oxidation than the UK fly ash.
机译：已经通过分批和连续方法制备了在聚丙烯均聚物（稳定用于一般用途的制造商）中含有50％wt粉煤灰（来自英国和南非）的复合材料。研究了以下偶联剂对复合材料光和热分解的影响：路博润Solplus C800（一种不饱和羧酸），γ-甲基丙烯酰氧基丙基三甲氧基硅烷（c-MPS），1,3-亚苯基二马来酰亚胺（ BMI）和马来酸酐接枝聚丙烯（m-PP）。当基体通过单体偶联剂偶联到填料表面时，高熔体，热稳定性和光稳定性受到青睐，单体偶联剂有望吸附在粉煤灰表面的紧密堆积层中。在偶联剂也可以自聚合的情况下，观察到进一步的改进。由于m-PP在粉煤灰表面的吸附密度低，因此不会提高稳定性。在本研究采用的测试条件下，英国来源的飞灰相对较高的水/酸可溶性过渡金属离子含量似乎不会影响稳定性。来自南非的粉煤灰含有较高含量的石英和莫来石，以及较高含量的第1和2类金属。后者尤其可能导致偶联的界面区域从填料表面剥离，并且可能在原始表面上吸附稳定剂。这导致南非粉煤灰的抗氧化性通常比英国粉煤灰差。

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