Abstract The purpose of current work is to examine the influence of microcrystalline cellulose fibre on PLA/LLDPE polyblend and their characterization by the XRD, FESEM, TEM, DSC, POM and UTM. All three constituents were taken in different loading and then extruded in the twin screw extruder via melt extrusion technique. The tensile strength and percentage elongation of PLA/LLDPE/1% MCC was reduced to 56% and increased to 9% than pure PLA while UTS and % elongation were increased and decreased to ∼12 and ∼18% than PLA/LLDPE polyblend, respectively. The toughness of PLA/LLDPE/1% MCC was decreased to 1543 kJ/m3 from PLA 1942 kJ/m3. No change was observed in Tg of polyblend composite but the crystallization temperature was reduced by 5 °C. The spherulite growth rate of PLA/LLDPE/1 wt % MCC was 2.5 μm/min higher than neat PLA (1.1 μm/min) and PLA/LLDPE/3% MCC (1.8 μm/min). This study showed noticeable changes in various properties of the polyblend composites like mechanical, morphological, and crystallinity were influenced by the orientation of fibre, composition, polymer miscibility and interaction at the edges among the matrix, disperse phase and filler.

中文翻译：

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聚乳酸[PLA]/线性低密度聚乙烯[LLDPE]/微晶纤维素[MCC]纤维复合材料的形貌和结晶特性

摘要 当前工作的目的是通过 XRD、FESEM、TEM、DSC、POM 和 UTM 检测微晶纤维素纤维对 PLA/LLDPE 共混物的影响及其表征。所有三种成分都以不同的负载量取出，然后通过熔融挤出技术在双螺杆挤出机中挤出。PLA/LLDPE/1% MCC 的拉伸强度和伸长率比纯 PLA 降低到 56% 和增加到 9%，而 UTS 和伸长率百分比分别比 PLA/LLDPE 共混物增加和减少到 12% 和 18% . PLA/LLDPE/1% MCC 的韧性从 PLA 1942 kJ/m3 降低到 1543 kJ/m3。未观察到聚共混物复合材料的 Tg 变化，但结晶温度降低了 5°C。PLA/LLDPE/1 wt % MCC 的球晶生长速率比纯 PLA (1. 1 微米/分钟）和 PLA/LLDPE/3% MCC（1.8 微米/分钟）。该研究表明，复合材料的各种性能（如机械、形态和结晶度）的显着变化受到纤维取向、成分、聚合物混溶性以及基体、分散相和填料之间边缘相互作用的影响。