Improved Mechanical and Thermal Properties of Polypropylene Blends Based on Diethanolamine-Plasticized Corn Starch via in Situ Reactive Compatibilization

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• 作者：Lina Liu ; Youming Yu ; Ping鈥檃n Song
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：November 20, 2013
• 年：2013
• 卷：52
• 期：46
• 页码：16232-16238
• 全文大小：513K
• 年卷期：v.52,no.46(November 20, 2013)
• ISSN：1520-5045

文摘

Starch-based polymer blends are able to alleviate the environmental concerns. However, they usually suffer poor mechanical properties. Here, we first prepared plasticized starch using diethanolamine as a reactive plasticizer and then fabricated polypropylene (PP)/starch blends using maleic anhydride-grafted PP (MAPP) as the compatibilizer. It is found that the size of the starch domains gradually reduced with increasing MAPP loading, indicating significantly improved interfacial compatibility. Adding 15 wt % MAPP can basically retain the tensile strength and considerably enhance Young鈥檚 modulus, the bending strength, and the modulus of polymer blends relative to PP and its blends without compatibilization. Additionally, the glass transition temperature of PP is increased by 4.9 掳C for the PP blend with 30 wt % MAPP. These largely enhanced mechanical properties are mainly attributed to improved interfacial adhesion. Our work provides a facile, effective strategy for reducing the environmental impact of the use of nonbiodegradable plastics.