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Attempting to prepare a plastic scintillator from a biobased polymer
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2019-11-18 , DOI: 10.1002/app.48724
Matthieu Hamel 1 , Guillaume Lebouteiller 2
Affiliation  

A new plastic scintillator was prepared from a renewable polymer source. It is composed of the mighty 2,5‐diphenyloxazole and 1, 4‐bis(2‐methylstyryl)benzene molecules (PPO and bis‐MSB), acting as primary and secondary fluorophores, respectively, together dissolved in a polylactic acid matrix—PLA. This polymer is indeed considered as the biomass‐based equivalent of petroleum‐derived plastics in terms of mechanical and optical properties. Subsequent to the bis‐MSB emission, the emission wavelength is centered around 424 nm and the fluorescence decay time is in the nanosecond range. The material was fully characterized, and its scintillation performances were compared to a commercial PVT‐based plastic scintillator: EJ‐200. Like polystyrene‐ or polyvinyltoluene‐based scintillators, the material displayed a good response linearity with the energy of the incident gamma‐ray. However, the observed scintillation yield was rather modest, with a reported 500 ph/MeV value when excited with a gamma‐ray‐emitting 60Co source. This preliminary test could pave the way to new and renewable polymers for unexpected applications such as nuclear physics. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48724.

中文翻译:

尝试从生物基聚合物制备塑料闪烁体

从可再生的聚合物来源制备了一种新的塑料闪烁体。它由强大的2,5-二苯基恶唑和1,4,-双(2-甲基苯乙烯基)苯分子(PPO和bis-MSB)组成,分别作为一级和二级荧光团,一起溶解在聚乳酸基质-PLA中。从机械和光学性能的角度来看,该聚合物确实被认为是石油基塑料的生物质基当量。bis-MSB发射之后,发射波长集中在424 nm左右,荧光衰减时间在纳秒范围内。对该材料进行了充分表征,并将其闪烁性能与基于PVT的塑料闪烁体EJ-200进行了比较。像基于聚苯乙烯或聚乙烯甲苯的闪烁体一样,材料对入射伽马射线的能量显示出良好的响应线性。但是,观察到的闪烁产量相当适中,当用γ射线发射时,据报道有500 ph / MeV值60 Co源。这项初步测试可以为新的和可再生的聚合物铺平道路,以用于意外的应用,例如核物理。分级为4 +©2019 Wiley Periodicals,Inc.J.Appl。Polym。科学 2020137,48724。
更新日期:2020-02-26
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