CREPEC, Department of Chemical Engineering, Ecole Polytechnique de Montréal, 2900 Edouard Montpetit, PO 6079, Station Centre-Ville, Montréal, Qc, H3C 3A7, Canada.
Carbohydr Polym. 2013 Jan 30;92(1):138-48. doi: 10.1016/j.carbpol.2012.08.107. Epub 2012 Sep 2.
The emulsification efficacies of a range of compatibilizers for polyethylene/thermoplastic starch blends have been studied and a detailed morphological and mechanical analysis has been conducted. It is shown that polyethylene-maleic anhydride terpolymers containing elastomeric segments provided excellent emulsification of PE/TPS blends with a fine morphology (volume diameter of 1.4 μm; number average diameter of 600 nm). The blends compatibilized with these copolymers exhibit a very high elongation at break of about 800%, the highest value ever reported for PE/TPS systems. Also, significant improvement in notched impact strength performance at interfacial saturation was found for these systems leading to specimens with an equivalent performance to pure polyethylene. An excellent correlation was found between the critical concentration for interfacial saturation and the mechanical properties, indicating the key role of morphology.
研究了一系列用于聚乙烯/热塑性淀粉共混物的增容剂的乳化效率，并进行了详细的形态学和力学分析。结果表明，含有弹性体段的马来酸酐三元共聚物聚乙烯能极好地乳化 PE/TPS 共混物，形态良好（体直径为 1.4μm；数均直径为 600nm）。用这些共聚物增容的共混物的断裂伸长率非常高，约为 800%，这是迄今为止报道的 PE/TPS 体系中的最高值。此外，这些体系在界面饱和时的缺口冲击强度性能也有显著提高，使试样的性能与纯聚乙烯相当。在界面饱和的临界浓度与力学性能之间发现了很好的相关性，表明形态学起着关键作用。
