Studies on hydroxyl terminated polybutadiene toughened phenolic resin13;

Nirmal, C and Maithi, SN and Padmavathi, T and Vanaja, A and Rao, RMVGK (2006) Studies on hydroxyl terminated polybutadiene toughened phenolic resin13;. High Performance Polymers, 18 (1). pp. 57-69.

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Abstract

Phenolic novolac was modified with hydroxyl terminated polybutadiene (HTPB) using resole as compatibilizer. These systems were characterized by differential scanning calorimetry, and IR analysis. Neat resin castings were prepared with varying percentages of HTPB. The fracture toughness of these systems was assessed by evaluating the critical stress intensity factor (K lt;subgt;Iclt;/subgt;) using single-edge notch, three-point bend specimens. The fracture behavior was characterized by scanning electron microscopy. These studies revealed that the fracture toughness of the phenolic novolac resin was improved by blending it with HTPB due to the formation of a heterogeneous phase with minute particles of elastomer, which arrests the propagation of cracks.

Item Type: Journal Article
Uncontrolled Keywords: Phenolic novolac;Calorimetry;Electron microscopy
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
AERONAUTICS > Aerodynamics
Division/Department: Fibre Reinforced Plastics Division, Fibre Reinforced Plastics Division, Fibre Reinforced Plastics Division, Fibre Reinforced Plastics Division, Fibre Reinforced Plastics Division
Depositing User: M/S ICAST NAL
Date Deposited: 05 Aug 2008
Last Modified: 24 May 2010 09:54
URI: http://nal-ir.nal.res.in/id/eprint/4059

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