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首页> 外文期刊>Journal of Applied Polymer Science >Prodegradant effect of titanium dioxide nanoparticulates on polypropylene-polyhydroxybutyrate blends
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Prodegradant effect of titanium dioxide nanoparticulates on polypropylene-polyhydroxybutyrate blends

机译：二氧化钛纳米粒子对聚丙烯 - 多羟基丁酸酯共混物的产品

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摘要

Polymers are gradually replacing conventional materials in various sectors of the economy because of their low cost and broad functionality. However, the high stability of polymers under most environmental conditions can lead to their accumulation in the form of waste. Polyhydroxybutyrate (PHB) is an alternative because of its biodegradability, but it is usually expensive and brittle. These aspects can be improved through the formation of blends, such as with polypropylene (PP). The objective of this study was to investigate the possibility of using titanium dioxide (TiO2) nanoparticles as a prodegradant agent in the PP-PHB-TiO2 system through the evaluation of the effects of these nanoparticles under UV light on the structure and properties of the materials. Samples were produced through extrusion and injection molding and were characterized by their mechanical and thermal properties and structural analyses. The results show that the TiO2 nanoparticles were able to act as a prodegradant agent for the PP-PHB blend; they also successfully improved some of the mechanical and dynamic mechanical properties of the blend. However, a TiO2 nanoparticle content higher than 7.5 wt % was not able to extend the photodegradation process further, possibly as a consequence of the agglomeration of nanoparticles during the processing of these more concentrated blends. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46636.
机译：由于其成本低，功能低，聚合物在经济部门的各个部门逐渐取代常规材料。然而，在大多数环境条件下聚合物的高稳定性可能导致废物形式的积累。由于其生物降解性，多羟基丁酸酯（PHB）是一种替代性，但它通常昂贵且易碎。通过形成共混物，例如用聚丙烯（PP）可以改善这些方面。本研究的目的是研究在PP-PHB-TiO2系统中使用二氧化钛（TiO 2）纳米颗粒的可能性，通过评估这些纳米颗粒在UV光下对材料的结构和性质的影响。通过挤出和注塑制备样品，其特征在于它们的机械和热性能和结构分析。结果表明，TiO2纳米颗粒能够用作PP-PHB混合物的产品;它们还成功地改善了混合物的一些机械和动态机械性能。然而，高于7.5wt％的TiO2纳米颗粒含量不能进一步延长光降解过程，可能是由于纳米颗粒在处理这些更浓缩的共混物期间的聚集。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46636。

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