کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5206319 | 1502952 | 2014 | 8 صفحه PDF | دانلود رایگان |
Polylactide (PLA) and natural rubber (NR) are two major renewable resources in the polymer materials field. However, their blend has not yet met engineering needs, largely because of a lack of interfacial adhesion between the continuous PLA phase and dispersed NR droplets. To address this issue, we have designed a novel super toughened biobased PLA/NR blend prepared by peroxide-induced dynamic vulcanization, in which the cross-linked NR phase has a specific continuous “net-like” structure. A sharp brittle-ductile transition occurred in the blend with 35Â wt% NR, showing impact strength of 58.3Â kJ/m2, approximately 21 times that of the neat PLA. The peroxide initiated reactive compatibilization at the interface between PLA and NR. The toughening mechanism and deformation of the crosslinked “net-like” NR phase during stretching are discussed. Our results provide evidence of a continuous “net-like” NR located in the PLA matrix with good interfacial adhesion, which potentially enhances the mechanical properties of the material.
Journal: Polymer Testing - Volume 38, September 2014, Pages 73-80