Fluorinated semi-interpenetrating polymer networks for enhancing the mechanical performance and storage stability of polymer-bonded explosives by controlling curing and phase separation rates  

作　　者：Chao Deng Huihui Liu Yongping Bai Zhen Hu 

机构地区：[1]School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150000,China [2]Wuxi HIT New Material Research Institute Co.,Ltd.,Wuxi 214000,China [3]Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang 621900,China

出　　处：《Defence Technology（防务技术）》2024年第8期58-66,共9页Defence Technology

基　　金：supported by Wuxi HIT New Material Research Institute and China Academy of Engineering Physics。

摘　　要：Herein, the effect of fluoropolymer binders on the properties of polymer-bonded explosives(PBXs) was comprehensively investigated. To this end, fluorinated semi-interpenetrating polymer networks(semiIPNs) were prepared using different catalyst amounts(denoted as F23-CLF-30-D). The involved curing and phase separation processes were monitored using Fourier-transform infrared spectroscopy, differential scanning calorimetry, a haze meter and a rheometer. Curing rate constant and activation energy were calculated using a theoretical model and numerical method, respectively. Results revealed that owing to its co-continuous micro-phase separation structure, the F23-CLF-30-D3 semi-IPN exhibited considerably higher tensile strength and elongation at break than pure fluororubber F2314 and the F23-CLF-30-D0 semi-IPN because the phase separation and curing rates matched in the initial stage of curing.An arc Brazilian test revealed that F23-CLF-30-D-based composites used as mock materials for PBXs exhibited excellent mechanical performance and storage stability. Thus, the matched curing and phase separation rates play a crucial role during the fabrication of high-performance semi-IPNs;these factors can be feasibly controlled using an appropriate catalyst amount.

关 键 词：Semi-interpenetrating polymer networks FLUOROPOLYMER Curing rate Phase separation rate Polymer-bonded explosives 

分 类 号：TQ560.1[化学工程—炸药化工]