Enhanced impact strength and toughness of polyamide 6,6 - micro-crystalline cellulose composites via hydrogen-bonding
발표자
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초록
내용
Polyamide66 (PA66) is engineering plastic used as a battery pack material by compounding with glass fiber (GF) through extrusion process. The PA66-GF composites account for 30% of the total weight of battery. Toward lightweight and low-cost battery pack, we employed micro-crystalline cellulose (MCC) to replace GF in the extrusion process for the PA66 composites. In addition to the benefits, hydroxyl groups of MCC participate in hydrogen bonding with amide group of PA66, improving chemical compatibility as well as interfacial adhesion at polymer-filler interfaces. The favorable interactions resulted in enhanced mechanical properties of the composites. At 0.5 wt% of MCC loading, impact strength increased by 7 kgf cm/cm in comparison with the neat PA66, comparable to the impact strength of GF 20 wt%. Remarkably, toughness increased by 40% from that of neat PA66 mainly by enhanced elongational properties. We will also discuss structure-property relationships of the PA66-MCC composites.