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FT-IR and FT-Raman Studies of Cross-Linking Processes With Ca(2+) Ions, Glutaraldehyde and Microwave Radiation for Polymer Composition of Poly(acrylic acid)/sodium Salt of Carboxymethyl Starch--Part I

FT-IR and FT-Raman Studies of Cross-Linking Processes With Ca(2+) Ions, Glutaraldehyde and Microwave Radiation for Polymer Composition of Poly(acrylic acid)/sodium Salt of Carboxymethyl Starch--Part I

Beata Grabowska, Maciej Sitarz, Ewa Olejnik, Karolina Kaczmarska

Spectrochim Acta A Mol Biomol Spectrosc. 2015 Jan 25;135:529-35.

PMID: 25123942

Abstract:

FT-IR and FT-Raman spectroscopic methods allowed to identify the cross-linking process of the aqueous composition of poly(acrylic acid)/sodium salt of carboxymethyl starch (PAA/CMS-Na) applied as a binder for moulding sands. The cross-linking was performed by chemical methods by introducing cross-linking substances with Ca(2+) ions or glutaraldehyde and by physical way, applying the microwave radiation. It was found that Ca(2+) ions cause formation of cross-linking ionic bonds within carboxyl and carboxylate groups. Glutaraldehyde generates formation of cross-linking bonds with hemiacetal and acetal structures. Whereas in the microwave radiation field, due to dehydration, lattices are formed by anhydride bonds.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP9003047	Poly(acrylic acid sodium salt)		9003-04-7	Price

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