Abstract

Cellulose nanocrystals (CNC)/poly(butylene adipate-co-butylene terephthalate) composites enhanced compatibility with phthalic anhydride were one-step prepared via melt blending. The obtained composites then underwent squeezing treatment in a two-roll milling equipment at a given temperature. CNC/PBAT composites were separated and then tested via FTIR and UV–Vis spectrophotometer. During reactive blending, phthalic anhydride selectively reacts with CNC. Before squeezing, tensile strength of CNC/PBAT composites is weakened with increasing phthalic anhydride content. After squeeze treatment at an extension ratio of 6, tensile strength of CNC/PBAT (3/97) is dramatically increased from 29.6 to 148.0 MPa, which is much higher than that of pristine PBAT 85.0 MPa. SEM and WAXD results show that PBAT crystallinity is increased after orientation, and CNC show an orientation arrangement along force direction in PBAT matrix.

中文翻译：

---

挤压取向增强对纤维素纳米晶体/聚己二酸丁二醇酯-对苯二甲酸丁二醇酯复合材料的影响

摘要

纤维素纳米晶体（CNC）/聚（亚丁基己二酸酯共通过熔融共混制备一步法制备的与邻苯二甲酸酐相容性增强的复合材料。然后将获得的复合材料在给定温度下在两辊研磨设备中进行挤压处理。分离CNC / PBAT复合材料，然后通过FTIR和UV-Vis分光光度计进行测试。在反应性共混期间，邻苯二甲酸酐与CNC选择性反应。挤压前，随着邻苯二甲酸酐含量的增加，CNC / PBAT复合材料的拉伸强度会减弱。在以6的拉伸比进行挤压处理后，CNC / PBAT（3/97）的拉伸强度从29.6 MPa急剧增加到148.0 MPa，远高于原始PBAT 85.0 MPa。SEM和WAXD结果表明，取向后PBAT的结晶度增加，