SOME PRELIMINARY STUDIES ON THE SHELF LIFE OF RT CURE GLASS-EPOXY PREPREG

Chandrakala, K and Vanaja, A and Rao, RMVGK (2007) SOME PRELIMINARY STUDIES ON THE SHELF LIFE OF RT CURE GLASS-EPOXY PREPREG. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

Preliminary studies were carried out on the storage life of prepregs made out of bifunctional epoxy resin system (Imported resin system LY5052/HY5052) as matrix and glass fiber as reinforcement and maintained at sub-ambient temperature(-1 S°C). Composite laminates were prepared out of these prepregs at room temperature by using the vacuum bag technique. The thermal (Glass transition temperature, Tg) properties were evaluated and compared with a composite prepared in a conventional way (without the usage of pre impregnated plies) at room temperature employing a similar moulding technique. These studies established the maximum storage period of prepregs to be 20days at -18°C with optimized processing techniques and thermal properties.

Item Type: Monograph (Project Report)
Uncontrolled Keywords: Prepregs,Shelflife,DSC,Tg,bifunctional epoxy
Subjects: AERONAUTICS > Aircraft Design, Testing & Performance
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Mr Nisanth
Date Deposited: 19 Jul 2011 04:39
Last Modified: 19 Jul 2011 04:39
URI: http://nal-ir.nal.res.in/id/eprint/9452

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