Abstract

Poly(propylene 2,5-furan dicarboxylate) (PPF) is an example of alipharomatic bio-based polyester which has a high potential for the replacement of its fossil-based terephthalate counterparts (PPT). PPF offers advantages over PPT owing to its brilliant properties. However, PPF often exhibits a slow rate of crystallization, which is a bottleneck for its successful synthesis. This has also caused limited research work on the use of PPF for the specific application. Therefore, in this study, PPF is melt compounded with microcrystalline cellulose (MCC) via twin-screw extrusion, which in turn enhances its crystallization. During its preparation, no toxic chemicals are used to modify the fibers or compatibilizers, indicating that the synthesis method follows green chemistry principles. The influence of the MCC on the thermal, structure and surface behaviors of PPF is analyzed using Fourier transform infrared spectroscopy, scanning electron microscopy, differential scanning calorimetry (DSC), thermo-gravimetric analysis and X-ray diffraction. The effect of the MCC on both non-isothermal and isothermal crystallization of PPF is also explored by using DSC. It is observed that crystallization is faster, while PPF is compounded with lower content of MCC. Similarly, the nucleating rate is intensified with the introduction of MCC. The incorporation of MCC significantly increased tensile modulus, strength and elongation of break of progressing PPF by 16%, 63% and 61%, respectively, at a content of 15 wt.% MCC. The blend also owned better oxygen and carbon dioxide barrier properties than neat PPF as a function of MCC content. This study is expected to spur further work on the synthesis of PPF composite for packaging applications.

Graphic abstract

中文翻译：

---

通过直接共混微晶纤维素使聚（2,5-呋喃二甲酸丙二醇酯）成核和结晶：改善的拉伸性能和阻隔性能

摘要

聚（2，5-呋喃二甲酸丙二酯）（PPF）是一种脂族生物基聚酯的例子，它有很大的潜力替代其对化石基对苯二甲酸酯（PPT）。PPF由于其出色的性能而提供了优于PPT的优势。但是，PPF常常显示出缓慢的结晶速率，这是其成功合成的瓶颈。这也导致在针对特定应用使用PPF方面的研究工作有限。因此，在这项研究中，PPF通过双螺杆挤出与微晶纤维素（MCC）熔融混合，从而增强了其结晶度。在其制备过程中，没有使用有毒化学物质来修饰纤维或增容剂，这表明该合成方法遵循绿色化学原理。MCC对热量的影响 使用傅里叶变换红外光谱，扫描电子显微镜，差示扫描量热法（DSC），热重分析和X射线衍射分析PPF的结构和表面行为。还通过使用DSC探索了MCC对PPF的非等温结晶和等温结晶的影响。观察到结晶更快，而PPF与较低的MCC含量混合。类似地，随着MCC的引入，成核速率增强。当MCC的含量为15重量％时，MCC的掺入显着提高了进行中的PPF的拉伸模量，强度和断裂伸长率分别为16％，63％和61％。该混合物还具有比纯PPF更好的氧气和二氧化碳阻隔性能，这是MCC含量的函数。

图形摘要