Functional graphene nanoplatelet reinforced epoxy resin and polystyrene-based block copolymer nanocomposite

GRAPHICAL ABSTRACT

ABSTRACT

Amine-functionalized graphene nanoplatelet (GNP-A) was reinforced in a blend matrix of diglycidyl ether of bisphenol-A (DGEBA) and polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (PSPEB) via facile solution approach. Diaminodiphenylmethane was employed as hardener. According to SEM, inclusion of pristine GNP enhanced surface roughness, however, autumn leaf like pattern was observed in amine-functional nanocomposite. For 0.1 wt.% pristine GNP loading T_max was observed as 545°C, whereas GNP-A showed higher value (553°C). Glass transition temperature of amine-system was also higher (230°C) than pristine one (224°C). DGEBA/PSPEB/GNP-A 0.1 depicted semi-crystalline nature (12.6°and 19.8°). EMI shielding effectiveness of nanocomposite was sufficiently high i.e. ∼18.87-20.15 dB.

KEYWORDS:

• graphene nanoplatelet
• DGEBA
• block copolymer
• thermal properties
• EMI