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首页> 外文期刊>Journal of Applied Polymer Science >Influence of heat treatment on the heat distortion temperature of poly(lactic acid)/bamboo fiber/talc hybrid biocomposites
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Influence of heat treatment on the heat distortion temperature of poly(lactic acid)/bamboo fiber/talc hybrid biocomposites

机译：热处理对聚乳酸/竹纤维/滑石粉复合生物复合材料热变形温度的影响

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摘要

Influence of heat treatment and fillers on the heat distortion temperature (HDT) of poly(lactic acid) hybrid biocomposites was intensively studied through HDT testing, polarizing microscope (POM), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). With loading 20 wt % BF or 20 wt % talc, improvement of HDT in PLA composite was about 10°C comparing with neat PLA after heat treatment. Moreover, there was a great improvement (above 45°C) of HDT in PLA composites with loading 20 wt % BF and 20 wt % talc simultaneously after heat treatment. Transcrystallization was observed during heat treatment and isothermal crystallization of PLA composites with loading BF and talc simultaneously. There was no similar phenomenon in other PLA composite with loading only one filler. The possible mechanism of forming transcrystallization was proposed. DSC and DMA were also used to clarify the variation in HDT before and after heat treatment, and the results suggest that the crystallinity, modulus and glass transition changed, especially formation of transcrystallization played a key role in improvement of HDT in PLA composites.
机译：通过HDT测试，偏光显微镜（POM），差示扫描量热法（DSC）和动态力学分析（DMA），深入研究了热处理和填料对聚乳酸杂化生物复合材料热变形温度（HDT）的影响。在负载20％（重量）的BF或20％（重量）的滑石的情况下，与热处理后的纯PLA相比，PLA复合材料的HDT改善了约10°C。而且，在热处理后同时加入20 wt％的BF和20 wt％的滑石的PLA复合材料中，HDT有了很大的改善（高于45°C）。在同时加载BF和滑石粉的PLA复合材料的热处理和等温结晶过程中观察到了转晶。在其他仅填充一种填料的PLA复合材料中，没有类似的现象。提出了形成转晶的可能机理。 DSC和DMA还用于阐明热处理前后HDT的变化，结果表明，结晶度，模量和玻璃化转变发生了变化，尤其是转结晶的形成对PLA复合材料HDT的改善起着关键作用。

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