Microwave assisted improvement in physico-mechanical properties of poly(vinyl alcohol)/poly(ethylene imine)/gelatin blends

Blends of poly (vinyl alcohol) (PVA), poly-N-acyl ethyleneimine (PEI) and gelatin (PVA/ PEI/Gel) in the weight ratios 100/0/2, 95/5/2, 90/10/2, 85/15/2, 80/20/2 and 70/30/2 were prepared by solution casting method. The effects of poly (ethylene imine) component in the blend and microwave irradiation...

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Bibliographic Details
Published in:Journal of polymer research 2010, Vol.17 (1), p.89-98
Main Authors: Manjula, M. K, Lokanatha Rai, K. M, Raj, J. M, Manjula, C. S, Siddaramaiah, Ranganathaiah, C
Format: Article
Language:English
Subjects:
Alcohols
Blends
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Gelatins
Industrial Chemistry/Chemical Engineering
Irradiation
Microwaves
Original Paper
Polyetherimides
Polymer blends
Polymer Sciences
Polyvinyl alcohols
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Summary:Blends of poly (vinyl alcohol) (PVA), poly-N-acyl ethyleneimine (PEI) and gelatin (PVA/ PEI/Gel) in the weight ratios 100/0/2, 95/5/2, 90/10/2, 85/15/2, 80/20/2 and 70/30/2 were prepared by solution casting method. The effects of poly (ethylene imine) component in the blend and microwave irradiation on the mechanical and microstructural properties have been investigated using various techniques along with Positron Annihilation Lifetime Spectroscopy (PALS). We observed tremendous improvement in mechanical properties after microwave irradiation for 60 s in 5 wt% of PEI component blend. These results are supported by the SEM data as well the optical data. The free volume data from positron results showed minimum free volume at 5 wt% of PEI after 60 s of irradiation due to cross linking through hydrogen bond formation and possible estrification among the blend components. These results correlate well the mechanical properties like tensile strength and modulus.
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-009-9294-7