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Effect of filler on the total protein content and mechanical properties of natural rubber latex films at different filler loadings
Journal of Rubber Research ( IF 1.3 ) Pub Date : 2020-09-10 , DOI: 10.1007/s42464-020-00051-x
A. R. Ruhida , A. Hassan , S. Shamheza

Calcium carbonate (CaCO3) is an important filler, widely used rubber industries, particularly in natural rubber latex dipped such as gloves. The main advantages are cost reduction and product improvement. With the development of technology in superfine filler production, the use of CaCO3 as a non-reinforcing filler has gained much attention as it could help to improve natural rubber (NR) product properties. In this study, mixed clones of natural rubber field latex (MCFL) were prepared before further processing into mixed clones’ natural rubber latex concentrate (MCLC). The properties of MCLC were evaluated before compounds with CaCO3 and other rubber chemicals. The MCLC films were prepared from the MCLC added with CaCO3 varied from 10 to 40 parts per hundred rubber (pphr) and rubber chemicals. The total protein contents for unaged and aged latex films before and after acetone extraction was determined, respectively, according to total nitrogen (N) and extractable protein (EP) contents. The content of CaCO3 in MCLC films at different loadings was characterised by a Thermogravimetric analyser (TGA). Meanwhile, mechanical properties such as tensile and tear strengths were also determined. It was found that the total protein contents for the unaged MCLC films at different filler loadings were higher as compared to the aged samples. It is also proposed that the chemicals’ interference for MCLC films have occurred from 25 pphr until 40 pphr filler loadings. The tensile strength of MCLC films decreased as the filler loading increased. However, the tear strength of MCLC films increased as the filler loading increased.



中文翻译:

填充剂对不同填充量下天然胶乳薄膜总蛋白含量和力学性能的影响

碳酸钙(CaCO 3)是重要的填料,是橡胶工业中广泛使用的,特别是在浸有天然橡胶乳胶的手套中。主要优点是降低成本和改善产品。随着超细填料生产技术的发展,CaCO 3作为非增强填料的使用已引起了广泛关注,因为它可以帮助改善天然橡胶(NR)产品的性能。在这项研究中,先制备天然橡胶田间胶乳(MCFL)的混合克隆,然后再加工成混合克隆的天然橡胶胶乳浓缩物(MCLC)。在与CaCO 3和其他橡胶化学品混合之前,先评估了MCLC的性能。所述MCLC膜从与碳酸钙加入MCLC制备3每百份橡胶(pphr)和橡胶化学品10到40份不等。根据总氮(N)和可提取蛋白质(EP)的含量分别确定丙酮提取前后未老化和老化的乳胶膜的总蛋白质含量。CaCO 3的含量通过热重分析仪(TGA)对MCLC薄膜在不同负载下的粘度进行了表征。同时,还确定了机械性能,例如拉伸强度和撕裂强度。结果发现,与老化样品相比,在不同填充量下未老化的MCLC膜的总蛋白质含量更高。还建议从25 pphr到40 pphr填料填充量发生化学药品对MCLC膜的干扰。MCLC薄膜的拉伸强度随着填料含量的增加而降低。但是,MCLC薄膜的撕裂强度随填料含量的增加而增加。

更新日期:2020-09-10
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