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首页> 外文会议>Moratuwa Engineering Research Conference >Improvement of physico-mechanical properties of calcium carbonate filled natural nubber and low density polyethylene blends with titanate coupling agent
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Improvement of physico-mechanical properties of calcium carbonate filled natural nubber and low density polyethylene blends with titanate coupling agent

机译：用钛酸酯偶联剂改善碳酸钙填充天然钨极和低密度聚乙烯共混物的物理 - 力学性能

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摘要

Nonblack particulate fillers most used with thermoplastic and rubber are calcium carbonate, silica, talc and alumina hydrates. The main characteristics, which control the effectiveness and the dispersion of filler in the polymer, are structure, surface area and chemical activity of filler. The mechanical behavior of rubber-thermoplastic blends depends greatly on interactions and compatibility that develop between the two polymers and the filler. The main objective of this study is to improve physico-mechanical properties of calcium carbonate (CaCO) filled natural rubber (NR) and low density polyethylene (LDPE) blends using a titanate coupling agent. Two series of NR/LDPE blends, with and without titanate coupling agent, were prepared by varying LDPE loading from 10% to 90% at 10% intervals. 20 parts by weight of CaCO per 100 parts of combined polymer was incorporated into every blend composition. The blends were prepared using a Brabender plasticorder by melt mixing at a temperature of 130 °C, and at a rotor speed of 60 rpm. Physico-mechanical properties such as tensile properties, hardness, tear strength and morphology of the blends were studied. These properties were determined according to ISO standards. Morphology of the tensile fracture surface of blends was observed using a transmitted light microscopy. Tensile strength, tear strength and hardness of NR/LDPE blends increase with increase in LDPE loading while elongation at break decreases. NR/LDPE blends with titanate coupling agent exhibited enhanced properties at every LDPE loading. NR/LDPE blends having 30% of LDPE loading showed highest tensile strength. In this blend, NR was dispersed in LDPE matrix with good adhesion between NR and LDPE.
机译：与热塑性塑料和橡胶最多使用的非白皮颗粒填料是碳酸钙，二氧化硅，滑石和氧化铝水合物。控制聚合物中填料的有效性和分散的主要特性是填料的结构，表面积和化学活性。橡胶 - 热塑性混合物的机械性能大大取决于两种聚合物和填料之间发展的相互作用和相容性。本研究的主要目的是使用钛酸酯偶联剂改善碳酸钙（Caco）填充天然橡胶（NR）和低密度聚乙烯（LDPE）共混物的物理机械性能。通过在10％的间隔以10％至90％的10％至90％的载荷量，通过改变10％至90％，使用和不含钛酸酯偶联剂的两种NR / LDPE共混物。将每100份合并聚合物加入20重量份的CACO，掺入每个共混物组合物中。通过在130℃的温度下熔融混合使用Brabender塑料制备混合物，并以60rpm的转子速度。研究了物理 - 力学性质，如拉伸性，硬度，撕裂强度和混合物的形态。这些性质根据ISO标准确定。使用透射光学显微镜观察到共混物的拉伸骨折表面的形态。 NR / LDPE共混物的拉伸强度，撕裂强度和硬度随着LDPE载荷的增加而增加，而断裂伸长率降低。 NR / LDPE与钛酸酯偶联剂的混合物在每次LDPE负荷时表现出增强的性质。具有30％LDPE负荷的NR / LDPE共混物显示出最高的拉伸强度。在该混合物中，NR分散在LDPE基质中，在NR和LDPE之间具有良好的粘附性。

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