Influence of heat treatment on the heat distortion temperature of poly(lactic acid)/bamboo fiber/talc hybrid biocomposites

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...

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Bibliographic Details
Published in:Journal of applied polymer science 2012-03, Vol.123 (5), p.2828-2836
Main Authors: Shi, Q. F., Mou, H. Y., Li, Q. Y., Wang, J. K., Guo, W.H.
Format: Article
Language:English
Subjects:
annealing
Applied sciences
Bamboo
biodegradable
Composites
Crystallinity
Differential scanning calorimetry
Distortion
Dynamic tests
Exact sciences and technology
Fillers
Forms of application and semi-finished materials
heat distortion temperature
Heat treatment
Materials science
Polymer industry, paints, wood
Polymers
Talcs
Technology of polymers
thermal properties
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Summary: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. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
ISSN:0021-8995
1097-4628
1097-4628
DOI:10.1002/app.34807