Thermal Safety Performance Evaluation for Typical Free Radical Polymerization Initiator of <i>Tert</i>‐butyl Peroxypivalate

Wu, Xingliang; Liu, Dabin; Xu, Yabei; Meng, Zichun; Xu, Feiyang; Wang, Xu; Cao, Weiguo; Xu, Sen

doi:10.1002/slct.202002798

Cited by 5 publications

(3 citation statements)

References 20 publications

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“…However, there are still some bottlenecks. Foremost among these is the thermal safety performance of power batteries, which constitutes the primary hindrance to the widespread adoption of electric and hybrid electric vehicles 3 .…”

Section: Introductionmentioning

confidence: 99%

Application of power battery under thermal conductive silica gel plate in new energy vehicles

Ma,

Zong,

Wan

et al. 2024

Sci Rep

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This study aims to improve the performance of automotive battery thermal management systems (BTMS) to achieve more efficient heat dissipation and thus reduce hazards during driving. Firstly, the research parameters and properties of composite thermally conductive silicone materials are introduced. Secondly, the heating principle of the power battery, the structure and working principle of the new energy vehicle battery, and the related thermal management scheme are discussed. Finally, the research results are presented from the experimental test and controller design. In addition, to achieve the research goal, the composite thermally conductive silica gel plate (CSGP) material is studied in detail and parametrically analyzed, and the heating mechanism of the power battery is discussed in depth. The temperature characteristics after adding CSGP are experimentally tested, and the controller of the BTMS of the new energy vehicle is designed, including hardware circuits and software modules. The findings show that the temperature characteristics of the battery module have obvious limitations without CSGP. When the battery module operates at a 4C magnification, the temperature exceeds the safety threshold by 38.4%, with particular potential safety risks. Then, the maximum temperature of the battery module with CSGP can be controlled within 50 °C, and the temperature characteristics are prominently improved. Lastly, the controller of the BTMS is tested, and the results reveal that it has remarkable voltage recovery ability. According to the research results, the performance of automotive BTMS can be significantly improved, and better heat dissipation can be effectively achieved by adding CSGP. This helps reduce the hazards of driving. Moreover, the designed controller performs well in voltage recovery, providing solid theoretical support for further developing the CSGP battery management system.

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Section: Introductionmentioning

confidence: 99%

Application of power battery under thermal conductive silica gel plate in new energy vehicles

Ma,

Zong,

Wan

et al. 2024

Sci Rep

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show abstract

“…At the same time, it will lead to the decrease of product quality, and cause casualties and property losses. Therefore, the researchers have carried out plenty of tests on HMX, and have done lots of researches on thermal decomposition mechanism, [3–6] high pressure characteristics, [7–8] synthesis [9–11] and molecular kinetics simulation [12–15] . Wang et al [16–17] .…”

Section: Introductionmentioning

confidence: 99%

Study on the Thermal Stability of Octogen and other Energetic Materials (RDX, TNT, NQ, PBT, TDI and HTPB)

et al. 2020

ChemistrySelect

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The Octogen (HMX) and other energetic materials, such as Hexogen (RDX), Trinitrotoluene (TNT), Nitroguanidine (NQ), Polybutylene terephthalate Glycol Ester (PBT), Toluene Diisocyanate (TDI), and Hydroxy‐Terminated Polybutadiene (HTPB) were subjected to linear heating tests by a Microcalorimeter (C600), to obtain thermal decomposition curves. Based on this data, the thermal stability was studied experimentally and theoretically. The decomposition peak and melting peak of RDX were coupled, and the time to reach the maximum weight loss increased with the increase of heating rates. Within a certain experimental error range, the apparent activation energy calculated by different methods was basically consistent in a larger conversion rate range. The thermal stability of other energetic materials, such as RDX, TNT, NQ, PBT, TDI and HTPB in the mixed system of HMX were explored. The results revealed that HMX had salient thermal stability with RDX, PBT and TDI. However, the thermal stability of HMX mixed with TNT, NQ, HTPB and other substances was poor, which promoted the thermal decomposition of each other, resulting in the decrease of thermal decomposition temperature and further decrease of thermal safety of the mixed system. Therefore, HMX should not be placed in the same place as TNT, NQ and HTPB in the actual application process.

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“…Such termination is further exemplified in the synthesis of block copolymers as a new aliquot of radical initiator is introduced together with the next monomer addition, thus leading to the gradual accumulation of terminated chains and resulting in higher dispersities and impure block copolymers 17 . Another consideration of commonly employed thermal radical initiators, such as peroxides and azo-compounds, is that they are highly explosive chemicals and as such are quite challenging to not only transport but also to store [18][19][20][21] . In fact, this is an issue not only for RAFT polymerization but also for FRP, one of the most common polymerization methodologies in industry.…”

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confidence: 99%

Acid-triggered radical polymerization of vinyl monomers

Antonopoulou,

Jones,

Kroeger

et al. 2024

Nat. Synth

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Reversible addition–fragmentation chain-transfer (RAFT) polymerization is one of the most versatile and robust controlled radical polymerization methods owing to its broad material scope and high tolerance to various functionalities and impurities. However, to operate RAFT polymerization, a constant supply of radicals is required, typically via exogenous thermal radical initiators that are not only challenging to transport and store, but also primarily responsible for termination and end-group heterogeneity. Here we present an acid-triggered RAFT polymerization that operates in the dark and without any conventional radical initiator. Abundant acids (for example, sulfuric acid) are shown to have a dual role initiating and accelerating the polymerization. The polymers prepared have low dispersity and high end-group fidelity. The method is compatible with a wide range of vinyl monomers and solvents, and can be applied to the synthesis of well-controlled high molecular weight block copolymers, as well as to free radical polymerization.

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Thermal Safety Performance Evaluation for Typical Free Radical Polymerization Initiator of Tert‐butyl Peroxypivalate

Cited by 5 publications

References 20 publications

Application of power battery under thermal conductive silica gel plate in new energy vehicles

Application of power battery under thermal conductive silica gel plate in new energy vehicles

Study on the Thermal Stability of Octogen and other Energetic Materials (RDX, TNT, NQ, PBT, TDI and HTPB)

Acid-triggered radical polymerization of vinyl monomers

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