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Effect of coir content on mechanical and thermal properties of LLDPE/coir blend processed by rotational molding
Sādhanā ( IF 1.4 ) Pub Date : 2021-02-17 , DOI: 10.1007/s12046-021-01566-8
Nikita Gupta , P L Ramkumar

Rotational Molding is a unique polymer processing technique that gives an advantage of having stress free end product. Majorly, Linear Low Density Polyethylene (LLDPE) is preferred as a base resin for rotomolding. However, incorporation of additives becomes necessary to improve mechanical properties and viscoelasticity as incumbent for few applications. The present research makes an attempt to investigate the effect of coir fiber on rotationally moldable LLDPE. Based on preliminary processing experiments, 10% or less Coir in its powder form when mixed with LLDPE was found to account a better flow ability as a prerequisite for roto moldability. Hence, the effect of 3%, 5%, 7% and 10% Coir mixed with LLDPE was experimented for the roto molded product to determine the mechanical properties, viz. tensile, flexural, hardness and impact strength. Also, the rate of heat transfer was evaluated subjected to the data recorded for mold, oven and internal air temperature when processing LLDPE/Coir considering different weight percentages. Crystallinity of the blend was examined based on DSC analysis for the distinguished percentage of coir incorporated in LLDPE. The experimental results depicted an improvised mechanical properties by 7% or less fiber addition, and beyond that, the properties were found to be regressed. The present work successfully engulfed Coir with LLDPE, producing a uniform distribution along the sides of the mold without applying any external pressure. Therefore, fiber integration in the rotomolding process is believed to be possible thus preserving homogeneous randomly distributed fiber dispersion.



中文翻译:

椰壳含量对滚塑加工的LLDPE /椰壳共混物力学和热性能的影响

滚塑是一种独特的聚合物加工技术,具有无应力最终产品的优点。主要地,线性低密度聚乙烯(LLDPE)优选作为滚塑的基础树脂。然而,掺入添加剂对于改善机械性能和粘弹性是必不可少的,因为很少有应用。本研究试图研究椰壳纤维对可旋转模塑的LLDPE的影响。根据初步加工实验,发现与LLDPE混合的粉末状10%或更少的椰壳粉具有更好的流动性,这是旋转成型性的前提。因此,将3%,5%,7%和10%Coir与LLDPE混合的效果用于旋转成型产品,以确定机械性能,即。拉伸,弯曲,硬度和冲击强度。还,考虑到不同的重量百分比,在处理LLDPE / Coir时,应根据记录的模具,烘箱和内部空气温度的数据评估传热速率。基于DSC分析,检查掺混物的结晶度,以了解掺入LLDPE中的椰壳的显着百分比。实验结果表明,通过添加7%或更少的纤维改善了机械性能,除此之外,还发现性能退化。目前的工作成功地将LLDPE席卷了Coir,在不施加任何外部压力的情况下沿模具的侧面产生了均匀的分布。因此,据信在滚塑工艺中纤维整合是可能的,从而保持均匀的随机分布的纤维分散。考虑不同重量百分比时,处理LLDPE / Coir时的烤箱温度和内部空气温度。基于DSC分析,检查掺混物的结晶度,以了解掺入LLDPE中的椰壳的显着百分比。实验结果表明,通过添加7%或更少的纤维改善了机械性能,除此之外,还发现性能退化。目前的工作成功地将LLDPE席卷了Coir,在不施加任何外部压力的情况下沿模具的侧面产生了均匀的分布。因此,据信在滚塑工艺中纤维整合是可能的,从而保持均匀的随机分布的纤维分散。考虑不同重量百分比时,处理LLDPE / Coir时的烤箱温度和内部空气温度。基于DSC分析,检查掺混物的结晶度,以了解掺入LLDPE中的椰壳的显着百分比。实验结果表明,通过添加7%或更少的纤维改善了机械性能,除此之外,还发现性能退化。目前的工作成功地将LLDPE席卷了Coir,在不施加任何外部压力的情况下沿模具的侧面产生了均匀的分布。因此,据信在滚塑工艺中纤维整合是可能的,从而保持均匀的随机分布的纤维分散。基于DSC分析,检查掺混物的结晶度,以了解掺入LLDPE中的椰壳的显着百分比。实验结果表明,通过添加7%或更少的纤维改善了机械性能,除此之外,还发现性能退化。目前的工作成功地将LLDPE席卷了Coir,在不施加任何外部压力的情况下沿模具的侧面产生了均匀的分布。因此,据信在滚塑工艺中纤维整合是可能的,从而保持均匀的随机分布的纤维分散。基于DSC分析,检查掺混物的结晶度,以了解掺入LLDPE中的椰壳的显着百分比。实验结果表明,通过添加7%或更少的纤维改善了机械性能,除此之外,还发现性能退化。目前的工作成功地将LLDPE席卷了Coir,在不施加任何外部压力的情况下沿模具的侧面产生了均匀的分布。因此,据信在滚塑工艺中纤维整合是可能的,从而保持均匀的随机分布的纤维分散。目前的工作成功地将LLDPE席卷了Coir,在不施加任何外部压力的情况下沿模具的侧面产生了均匀的分布。因此,据信在滚塑工艺中纤维整合是可能的,从而保持均匀的随机分布的纤维分散。目前的工作成功地将LLDPE吞噬了Coir,从而在不施加任何外部压力的情况下沿模具的侧面产生了均匀的分布。因此,据信在滚塑工艺中纤维整合是可能的,从而保持均匀的随机分布的纤维分散。

更新日期:2021-02-17
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