The effect of nanoclays on the properties of PLLA-modified polymers part 1: Mechanical and thermal properties
The effect of nanoclays on the properties of PLLA-modified polymers part 1: Mechanical and thermal properties
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DOI：
10.1007/s10924-006-0007-6
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发表时间：
2006-04-01
影响因子：
5.3
通讯作者：
Kenig, S.
中科院分区：
文献类型：
--
作者：
Lewitus, D.;McCarthy, S.;Kenig, S.
将有机改性的蒙脱土以5%的负载水平掺入到膜级聚-L-乳酸（PLLA）中，使用基于半结晶或无定形聚-（乳酸）以及可生物降解的芳香族脂肪族聚酯的各种母料。使用双螺杆混配挤出机制备PLLA母料和混配制剂，而使用单螺杆流延膜挤出机制备膜。的膜的热性能和机械性能进行了检查，以确定粘土和不同的载体上的聚合物-粘土相互作用的效果。在最佳情况下，当使用基于PLLA的母料时，与纯PLLA相比，拉伸模量增加了30%，伸长率增加了40%，并且冷结晶温度降低了15 ° C。含有纳米粘土的PLLA膜的性能改善证明了扩展可生物降解膜应用范围的可能性，特别是在包装领域。
Organically modified montmorillonite clays were incorporated at a 5% loading level into film grade of poly-L-lactic acid (PLLA) using a variety of masterbatches based on either semi-crystalline or amorphous poly-(lactic acid), as well as biodegradable aromatic aliphatic polyester. The PLLA masterbatches and compounded formulations were prepared using a twin screw compounding extruder, while the films were prepared using a single screw cast film extruder. The thermal and mechanical properties of the films were examined in order to determine the effect of the clay and different carriers on the polymer-clay interactions. In the optimal case, when a PLLA-based masterbatch was used, the tensile modulus increased by 30%, elongation increased by 40%, and the cold crystallization temperature decreased by 15 degrees C, compared to neat PLLA. The properties improvement of PLLA films containing nano clays demonstrated the possibility to extend the range of biodegradable film applications, especially in the field of packaging.