Abstract
AbstractA series of the reinforced and toughened polylactide (PLA) composites with different content of basalt fibers (BF) were prepared by twin screw extruder. The toughness of BF/PLA composites was improved further by the addition of polyoxyethylene grafted with maleic anhydride (POE‐g‐MAH), ethylene–propylene–diene rubber grafted with maleic anhydride (EPDM‐g‐MAH), and ethylene‐acrylate‐glycidyl methacrylate copolymer (EAGMA), relatively. The mechanical properties, rheology, crystallization, and morphology of BF/PLA composites were studied. The results showed that basalt fiber had significant reinforcing and toughening effect in comparsion with glass fiber. EAGMA was more effective in toughening BF/PLA composites than POE‐g‐MAH and EPDM‐g‐MAH. When the content of EAGMA achieved to 20 wt %, the impact strength of BF/PLA/EAGMA composite increased to 33.7 KJ/m2, meanwhile the value was improved by 71.1% compared with pure PLA. According to dynamic rheometer testing, the use of the three kinds of elastomers increased the melt dynamic viscosity. Differential scanning calorimetry analysis showed that POE‐g‐MAH and EPDM‐g‐MAH can decrease the cold crystallization temperature (Tcc) to approximately 20°C and dramatically improve crystallinity (χc) of BF/PLA composites. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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