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首页> 外文期刊>Journal of King Saud University >Effect of phenol formaldehyde resin as vulcanizing agent on flow behavior of HDPE/PB blend
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Effect of phenol formaldehyde resin as vulcanizing agent on flow behavior of HDPE/PB blend

机译：酚醛树脂作为硫化剂对HDPE / PB共混物流动性能的影响

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Thermoplastic elastomer (TPE) based on High density polyethylene (HDPE)/polybutadiene (HDPE/PB = 70/30 parts) blends containing 1, 3, 5, 7 and 10 wt.% of dimethylol phenolic resin as a vulcanizing agent in the presence of SnCl 2 as catalyst was prepared. The dimethylol phenolic resin was prepared in our laboratory. The blends were compounded in mixer-60 attached to a Haake rheochord meter-90. The rheological properties were measured at temperatures 140, 160, 180 and 200 °C. The linearity of the flow curve appeared for 5% of the vulcanizing agent. The shear stress and shear viscosity have increased upon increasing the shear rate over a range of loading levels of vulcanizing agent of 1%, 3%, 5%, 7% and 10%. This may be attributed to the increased vulcanization between polyethylene and the rubber blend. The flow behavior index of the system shows a pseudo plastic nature behavior (since n 1). The consistency index ( K ) increased with the increase in the phenol formaldehyde resin content and the temperature. Hence, the increase in the value of the consistency index ( K ) of the polymer melts refers to more viscous materials prepared. The activation energy for the TPE blends fluctuated indicating that there is phase separation; where each polymer behaved separately. This study showed that HDPE/PB blends are characterized with good rheological properties, which can be recommended to be processed with the injection molding technique.
机译：在存在下，基于高密度聚乙烯（HDPE）/聚丁二烯（HDPE / PB = 70/30份）的热塑性弹性体（TPE）混合物，其中包含1，，3、5、7和10重量％的二羟甲基酚醛树脂作为硫化剂制备了SnCl 2作为催化剂。在我们的实验室中制备了二羟甲基酚醛树脂。将混合物在连接到Haake rheochord meter-90的混合器60中混合。在140、160、180和200°C的温度下测量流变性能。对于5％的硫化剂，流动曲线呈线性。在1％，3％，5％，7％和10％的硫化剂加载量范围内，随着剪切速率的增加，剪切应力和剪切粘度增加。这可能归因于聚乙烯和橡胶共混物之间硫化的增加。系统的流动行为指标显示出伪塑性性质（自n <1以来）。稠度指数（K）随着酚醛树脂含量和温度的增加而增加。因此，聚合物熔体的稠度指数（K）的值的增加是指制备的更粘的材料。 TPE共混物的活化能波动，表明存在相分离。每种聚合物的行为各不相同。这项研究表明，HDPE / PB共混物具有良好的流变性，可建议使用注塑技术进行加工。

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