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首页> 外文期刊>Polymer bulletin >Rheological, thermal and mechanical properties of biodegradable poly(lactic acid)/poly(butylene adipate-co-terephthalate)/poly(propylene carbonate) polyurethane trinary blown films
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Rheological, thermal and mechanical properties of biodegradable poly(lactic acid)/poly(butylene adipate-co-terephthalate)/poly(propylene carbonate) polyurethane trinary blown films

机译：可生物降解的聚（乳酸）/聚（丁烯己二酸丁二醇酯）/聚（碳酸丙酯）聚氨酯杂交薄膜的流变，热和机械性能

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摘要

Poly(lactic acid) (PLA), poly(butylene adipate-co-terephthalate) (PBAT) and poly(propylene carbonate) polyurethane (PPCU) were blended by using a twin-screw extruder, and then, the PLA/PBAT/PPCU trinary blends were made into films via the blown film technique. The PLA/PBAT/PPCU blends were characterized by dynamic rheometer and differential scanning calorimetry (DSC). From the analysis of DSC, it indicated that the glass transition temperature (T-g) of PBAT and PPCU was increased and the glass transition temperature (T-g) of PLA was decreased with increasing PPCU content. PPCU could improve miscibility among PLA, PBAT and PPCU. The tests of mechanical showed that the elongation at break of PLA/PBAT/PPCU films decreased from 240 to 226% in the machine direction and from 413 to 353% in the transverse direction. The tensile strength was increased in the machine direction from 40.2 to 46.5 MPa in the machine direction and from 28.5 to 42.8 MPa in the transverse direction. The tear strength was from 1334.7 to 143.6 kN/m in the machine direction and from 137.3 to 147.8 kN/m in the transverse direction. PBAT was a good toughening agent for PLA, and PPCU was a compatibilizer for PBAT and PLA blends.
机译：通过使用双螺杆挤出机，通过双螺杆挤出机（然后PLA / PBAT / PPCU）混合聚（丁烯己二酸丁二醇酯）（PBAT）和聚（碳酸酯）和聚（碳酸丙酯）聚氨酯（PPCU）通过吹塑薄膜技术制成薄膜。 PLA / PBAT / PPCU混合物的特征是通过动态流变仪和差示扫描量热法（DSC）。从DSC的分析中，表明PBAT和PPCU的玻璃化转变温度（T-G）增加，PPCU含量增加降低了PLA的玻璃化转变温度（T-G）。 PPCU可以提高PLA，PBAT和PPCU之间的混溶性。机械测试表明，PLA / PBAT / PPCU膜断裂的伸长率在机器方向上的240至226％和横向的413至353％。在机器方向上在机器方向上增加拉伸强度，在机器方向上和横向的28.5至42.8MPa增加。撕裂强度在机器方向上的1334.7至143.6 kN / m和横向的137.3至147.8kN / m。 PBAT是PLA的一种很好的增韧剂，PPCU是PBAT和PLA混合物的增容剂。

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