Thermal Analysis of a New Glass Fiber-Reinforced Bismaleimide Composite Material Used for Firefighter Helmets

Euroinvent ICIR 2018

Ciubotariu-Ana, P.^1 ; Micu, C.A.^1 ; Lohan, N.M.^1 ; Pricop, B.^1 ; Bujoreanu, L.G.^1 ; Bejinariu, C.^1

Gheorghe Asachi Technical University from Iasi-Romania, Faculty of Materials Science and Engineering, Blvd. Dimitrie Mangeron, No. 41, Iasi

700050, Romania^1

关键词: Bismaleimide composites;    Dynamic mechanical analysis (DMA);    Emergency situation;    Glass fibre reinforced;    Heating-cooling cycle;    Personal protection equipments;    Solid-state transitions;    Thermal characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/374/1/012022/pdf
DOI  :  10.1088/1757-899X/374/1/012022

来源: IOP

【 摘 要 】

Safety helmets represent essential Personal Protection Equipment (PPE) used in firefighter protection and emergency situations. They protect firefighter's face and eyes against flames, heat and flying debris. When temperature levels are high, user's thermal comfort is affected. A glass fibre-reinforced bismaleimide composite material has a number of improved properties in terms of mechanical and thermal characteristics, as compared to the materials that are currently used. The present paper aims to comparatively analyse the thermal behaviour of an injection moulded polypropylene helmet and the newly developed hot modelling material, under the form of a glass fibre-reinforced bismaleimide composite material. Thermal analysis was performed using Differential Scanning Calorimetry (DSC) and Dynamic-Mechanical Analysis (DMA). DSC and DMA thermograms were corroborated and discussed, from the point of view of the consecutive solid state transitions occurring during heating, mostly in the second heating-cooling cycle. The isothermal behaviour of glass fibre-reinforced bismaleimide composite material, during strain sweeps performed by DMA, enabled the determination of internal friction and storage modulus, under vibratory loads, at different temperatures. The advantages of the newly developed glass fibre-reinforced bismaleimide composite material were highlighted.