Indian materials smart materials
News Insight

Advanced Materials World Congress will be held in Stockholm, Sweden during 23-26 August 2015.

Online Advertising

Adv Mat Lett is an official journal of IAAM

VBRI Press is a member of CrossRefDOAJ
Adv Mat Lett is a member of DOAJ

fullabstractpdf

Get PDF

Full Article

Effect Of Nano Sized Transition Metal Salts And Metals On Thermal decomposition Behavior Of Polyvinyl Alcohol 

Ranjana Singh, S. G. Kulkarni, N. H. Naik

Volume 4, Issue 1, Page 82-88, Year 2013, 'ICNANO 2011' | DOI: 10.5185/amlett.2013.icnano.114

Keywords: Polymer composites; preorganized matrix; decomposition temperature; glass transition temperature.

Abstract: 

A number of nanocomposites have been synthesized biomimetically by embedding various transition metal salts in polyvinyl alcohol (PVA) as the preorganised matrix. The metal salts were reduced to metallic form using aqueous sodium borohydride solution. In the present paper, very comprehensive studies on thermal decomposition behavior of these composites have been carried out using thermogravimetric and differential scanning calorimetric studies. The transition metal salts/ metals based composites exhibit increased thermal stability as indicated by shift in the decomposition temperature of pure PVA. The DSC data show increase in glass transition temperature of all composites, except the one containing iron, in comparison with neat PVA.The improvement in the thermal stability is explained in terms of decrease in the segmental mobility of polymer chains due to entrapment of metal salt / metal forming a complex with the hydroxyl group of the polymer chains and thus decreasing heat transfer process for decomposition of polymer composites. Copyright © 2013 VBRI press.

fullabstractpdf

Get PDF

Full Article