Journal of Polymer and Biopolymer Physics Chemistry
ISSN (Print): 2373-3403 ISSN (Online): 2373-3411 Website: http://www.sciepub.com/journal/jpbpc Editor-in-chief: Martin Alberto Masuelli
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Journal of Polymer and Biopolymer Physics Chemistry. 2014, 2(1), 25-28
DOI: 10.12691/jpbpc-2-1-4
Open AccessArticle

Variations in Specific Heat and Microstructure in Natural Rubber Filled with Different Fillers as Studied by Differential Scanning Calorimetry

Arunava Mandal1, Sandip Pan1, Subrata Mukherjee1, Achintya K. Saha1, Sabu Thomas2 and Asmita Sengupta1,

1Physics Department, Visva-Bharati Central University, P.O.- Santiniketan, West Bengal, India

2Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, Kerala, India

Pub. Date: March 20, 2014

Cite this paper:
Arunava Mandal, Sandip Pan, Subrata Mukherjee, Achintya K. Saha, Sabu Thomas and Asmita Sengupta. Variations in Specific Heat and Microstructure in Natural Rubber Filled with Different Fillers as Studied by Differential Scanning Calorimetry. Journal of Polymer and Biopolymer Physics Chemistry. 2014; 2(1):25-28. doi: 10.12691/jpbpc-2-1-4

Abstract

The variation of specific heat (Cp) of natural rubber (NR) is studied by Differential Scanning Calorimetry (DSC). The NR samples are filled with different fillers (nanoclay, TiO2, and nanosilica) at different concentrations. The DSC measurements are done in N2 atmosphere with constant pressure of 0.3 bar to prevent any oxidation of the samples. The temperature has been varied up to 210°C from -40°C at a constant heating rate of 10°C \min throughout the experiment and Proteus analysis software is used to study the variation of specific heat (Cp) as function of both temperature and filler concentrations. The investigation shows that the Cp values increase with the increase of filler concentrations. Due to nanometer range diameter, these fillers fill up some of the free volume holes of NR sample. The fillers also make cross-link with NR chains causing an increase the molecular weight of NR as well as the Cp values. Thus the fillers act as active fillers for NR sample.

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