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Impacts of gamma irradiation on the properties of hardwood composite based on rice straw and recycled polystyrene foam wastes

机译：γ辐射对基于稻草和再生聚苯乙烯泡沫废物的硬木复合材料性能的影响

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摘要

A hardwood composite (HWC) was formulated by adding rice straw (RS), as filler, to the recycled polystyrene (WPS) foam waste, as a matrix, at 170 degrees C and pressing under 40 kPa. The air dried RS fiber reinforced the recycled spent polymer at fiber content of 50% (mass:mass), then the combination was treated with the maleated form of the polystyrene waste (WPS-g-MA), as coupling agent, at a predetermine ratio. The final HWC boards were subjected to gamma irradiation, in air and at ambient temperature (approximate to 30 +/- 3 degrees C), using radiocobalt source (Co-60) at a dose rate 0.96 kGy h(-1) in the range of integrated doses from 0.5 to 500 kGy. The impacts of increasing gamma absorbed doses on mechanical properties of final product were evaluated based on flexural strength, tensile strength, elongation at break, and tensile modulus measurements. Water absorption by the HWC boards was, also, elaborated under the increasing irradiation doses. To achieve a complete characterization of the prepared composite, the obtained hard samples were investigated applying the Fourier-transform infrared (FTIR) and the scanning electron microscope (SEM) tools. Depending on the experimental data, the renewability in the properties of HWC product is its high resistance capability against gamma-irradiation up to 500 kGy and their acceptable attenuation potential, in the range of the applied doses. This provided an additional attractive advantage to the eco-friendly quality of the acquired HWCs based on recycled thermoplastic spent polystyrene foam reinforced with air dried RS. POLYM. COMPOS., 40:2284-2291, 2019. (c) 2018 Society of Plastics Engineers
机译：通过将稻草（RS），作为填料添加到再循环聚苯乙烯（WPS）泡沫废物，作为基质，以170℃并在40kPa下压制来配制硬木材复合材料（HWC）。在50％（质量：质量）的纤维含量下加强的空气干燥RS纤维在纤维含量（质量：质量）中加强了循环的花分聚合物，然后用偶联剂的聚苯乙烯废物（WPS-G-MA）的原料形式处理该组合，作为偶联剂。比率。最终的HWC板在空气和环境温度下进行γ辐射（近似为30 +/- 3℃），使用含量率为0.96kGy H（-1）在范围内整合剂量为0.5至500 kgy。基于弯曲强度，抗拉强度，断裂伸长和拉伸模量测量，评估增加γ吸收剂量对最终产物力学性能的影响。 HWC板的吸水性也在增加的辐照剂量下阐述。为了实现制备的复合材料的完全表征，研究了所得硬样的样品，施加傅里叶变换红外（FTIR）和扫描电子显微镜（SEM）工具。根据实验数据，HWC产品性能的可再生能力是其在施加剂量范围内的γ-辐照的高抗γ辐射和可接受的衰减电位。这为基于再循环的热塑性废聚苯乙烯泡沫加固的回收的热塑性废荷兰聚苯乙烯泡沫提供了额外的有吸引力的优势。聚合物。 Compos。，40：2284-2291,2019。（c）2018塑料工程师协会

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