The influences of plasticizer B2 mass fraction on the performances of CAB/B2 polymer composite materials: Combining experiments and simulations,Journal of Vinyl and Additive Technology

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The influences of plasticizer B2 mass fraction on the performances of CAB/B2 polymer composite materials: Combining experiments and simulations
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2020-07-04 , DOI: 10.1002/vnl.21781
Jing Li ₁ , Shaohua Jin ₁ , Hui Chao ₂ , Na Wang ₂ , Guangyuan Zhang ₂ , Baoping Lu ₁ , Kun Chen ₁

Affiliation

Cellulose acetate butyrate (CAB)/B2 (50 wt% bis(2,2‐dinitropropyl)‐acetal and 50 wt% bis(2,2‐dinitropropyl)‐formal) polymer composite material is a commonly used binder system to prepare polymer bonded explosives (PBXs). However, few literature report the influence of plasticizer B2 mass fraction on the performance of CAB/B2 polymer composite binder systems. In this study, experiment measurements and computer simulations are utilized to explore the influences of B2 mass fraction on the glass transition temperature, mechanical property, and thermal decomposition of CAB/B2 polymer composite materials. The results show that, with an increase in B2 content, the glass transition temperature and fragility of CAB/B2 are decreased, and the plasticity and ductility of CAB/B2 are enhanced. Moreover, the thermal decomposition mechanism, decomposition products, and decomposition path of CAB/B2 are unchanged with the increase in B2 content. Besides, the researchers also demonstrate that the addition of B2 is positive to the formability of CAB/B2 systems and is negative to the thermal stability of CAB/B2 systems, whereas the content of B2 has little influences on the thermal stability of CAB/B2 systems. The results obtained from this work can provide some guidance for the designs of high‐energy density PBXs.

中文翻译：

增塑剂B2质量分数对CAB / B2聚合物复合材料性能的影响：组合实验和模拟

醋酸丁酸纤维素（CAB）/ B2（50 wt％的双（2,2-二硝基丙基）-乙缩醛和50 wt％的双（2,2-二硝基丙基）-甲醛）聚合物复合材料是一种常用的粘合剂体系，用于制备粘合的聚合物炸药（PBX）。然而，很少有文献报道增塑剂B2质量分数对CAB / B2聚合物复合粘合剂体系性能的影响。在这项研究中，利用实验测量和计算机模拟来探索B2质量分数对CAB / B2聚合物复合材料的玻璃化转变温度，机械性能和热分解的影响。结果表明，随着B2含量的增加，CAB / B2的玻璃化转变温度和脆性降低，CAB / B2的可塑性和延展性提高。而且，热分解机理随着B2含量的增加，CAB / B2的分解产物和分解路径均保持不变。此外，研究人员还表明，添加B2对CAB / B2系统的可成形性有积极影响，而对CAB / B2系统的热稳定性有不利影响，而B2的含量对CAB / B2系统的热稳定性影响很小系统。这项工作获得的结果可以为高能量密度PBX的设计提供一些指导。

更新日期：2020-07-04

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