Processing and characterization of poly(lactic acid) blended with polycarbonate and chain extender
-
Yottha Srithep
,
Wuttipong Rungseesantivanon
Abstract
Currently, use of poly(lactic acid) (PLA) is limited for commercial applications because it has a low heat resistance. In this research, an increase of over 40°C heat distortion temperature (HDT) of PLA alloy was obtained by blending PLA with polycarbonate (PC) and a chain extender (CE). Molecular weight, thermal, mechanical and morphological properties of PLA and PC blend with different CE contents were investigated. Gel permeation chromatography (GPC) results showed that some PLA-PC copolymers were produced and the compatibility of the PLA phase and in the PC phase was improved via the chain extension reaction. In addition, the reaction induced by CE also affected the crystallization behaviors of PLA, as observed from differential scanning calorimetry (DSC) results and the enthalpy of melting of PLA decreased with increasing CE content. The combined effects of the CE increasing molecular weight, improving compatibility and limiting the crystallization behavior of PLA/PC alloy greatly improved the HDT.
Acknowledgments
We thank Professor John Morris and Professor Yodthong Baimark for their useful suggestions.
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©2014 by De Gruyter
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Artikel in diesem Heft
- Frontmatter
- Editorial
- Editorial improvements at the Journal of Polymer Engineering
- Original articles
- Cationic copolymerization of 1,3-pentadiene with α-pinene
- In vitro degradation of polyglycolic acid synthesized by a one-step reaction
- Synthesis of a novel class of mixed-type surfmers and their properties in water
- Unique viscosity mutation of multi-generation hyperbranched waterborne polyurethane
- Preparation and characterization of oxidized starch-graft-poly(styrene-butyl acrylate) latex via emulsion polymerization
- Peroxide vulcanization of natural rubber. Part I: effect of temperature and peroxide concentration
- The stimuli-response characters of hydrogels prepared using ultrasound
- A new conductometric biosensor based on horseradish peroxidase immobilized on chitosan and chitosan/gold nanoparticle films
- A new approach for the development of textile waste cotton reinforced composites (T-FRP): laminated hybridization vs. coupling agents
- Effects of the surface treatment of wollastonite on the tensile and flow properties for reinforced polypropylene composites
- Effect of the quenching temperature on the mechanical and thermophysical properties of polycarbonate pigmented with titanium dioxide
- Processing and characterization of poly(lactic acid) blended with polycarbonate and chain extender
- Characteristics analysis and mold design for ultrasonic-assisted injection molding
