Superelastic percolation network of polyacrylamide (PAAm)–kappa carrageenan (κC) composite

• Published in: Cellulose (London) Vol. 20; no. 3; pp. 1145 - 1151
• Main Authors: Evingür, G. Akin, Pekcan, Ö.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.06.2013; Springer Nature B.V
• Subjects: Bioorganic Chemistry; Carrageenan; Ceramics; Chemistry; Chemistry and Materials Science; Composites; Elasticity; Glass; Modulus of elasticity; Natural Materials; Organic Chemistry; Original Paper; Percolation; Physical Chemistry; Polymer Sciences; Superelasticity; Sustainable Development; Elasticity; Acrylamide; Superelastic percolation network; Universality; Kappa carrageenan (κC)
• ISSN: 0969-0239; 1572-882X
• DOI: 10.1007/s10570-013-9903-9

The elasticity of the polyacrylamide (PAAm)-kappa carrageenan (κC) composite was determined as a function of (w/v-%) κC content at 40 °C. The gel composites studied contained various percentages (w/v-%) of κC. The elasticity of the swollen PAAm-κC composite was characterized by using the tensile testing technique. This study investigated the elasticity and the percolation threshold of PAAm-κC composite as a function of κC content. It is understood that the compressive elastic modulus decreases up to 1 (w/v-%) of κC and then increases at contents above 1(w/v-%) of κC. The critical exponent of elasticity y was determined between 1 and 1.6 (w/v-%) of κC and found to be 0.68. The observed elastic percolation threshold is consistent with the suggested values of the superelastic percolation network .