Rizwan Ali, Saleem Muhammad, Serbaya Suhail H, Alsulami Hemaid, Ghazal Aqsa, Mehmood Malik Sajjad
Department of Industrial Engineering, Faculty of Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
Department of Industrial Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
Polymers (Basel). 2021 Sep 9;13(18):3039. doi: 10.3390/polym13183039.
(1) Background: This study investigated the miscibility of carbon-based fillers within industrial scale polymers for the preparation of superior quality polymer composites. It focuses on finding the light distribution in gamma irradiated ultra-high molecular weight polyethylene (UHMWPE). (2) Methods: The Kubleka-Munk model (KMM) was used to extract the optical properties, i.e., absorption coefficients (μ) and scattering coefficients (μ). Samples amounting to 30 kGy and 100 kGy of irradiated (in the open air) UHMWPE from 630 nm to 800 nm were used for this purpose. Moreover, theoretical validation of experimental results was performed while using extracted optical properties as inputs for the Monte Carlo model of light transport (MCML) code. (3) Conclusions: The investigations revealed that there was a significant decrease in absorption and scattering coefficient (μ & μ) values with irradiation, and 30 kGy irradiated samples suffered more compared to 100 kGy irradiated samples. Furthermore, the simulation of light transport for 800 nm showed an increase in penetration depth for UHMWPE after gamma irradiation. The decrease in dimensionless transport albedo μs(μa+μs) from 0.95 to 0.93 was considered responsible for this increase in photon absorption per unit area with irradiation. The report results are of particular importance when considering the light radiation (from 600 nm to 899 nm) for polyethylene modification and/or stabilization via enhancing the polyethylene chain mobility.
(1) 背景：本研究调查了碳基填料在工业规模聚合物中的混溶性，以制备高质量的聚合物复合材料。研究重点是找出伽马辐照超高分子量聚乙烯（UHMWPE）中的光分布。(2) 方法：使用库贝尔卡-蒙克模型（KMM）提取光学特性，即吸收系数（μ）和散射系数（μ）。为此，使用了在空气中辐照剂量为30 kGy和100 kGy的UHMWPE样品，波长范围为630纳米至800纳米。此外，在将提取的光学特性作为光传输蒙特卡罗模型（MCML）代码的输入时，对实验结果进行了理论验证。(3) 结论：研究表明，随着辐照，吸收系数和散射系数（μ和μ）值显著降低，30 kGy辐照的样品比100 kGy辐照的样品下降得更多。此外，对800纳米光传输的模拟表明，伽马辐照后UHMWPE的穿透深度增加。无量纲输运反照率μs(μa+μs)从0.95降至0.93，被认为是辐照后单位面积光子吸收增加的原因。当考虑通过提高聚乙烯链迁移率对聚乙烯进行改性和/或稳定化的光辐射（600纳米至899纳米）时，报告结果尤为重要。
