Role of acrylic and melamine-formaldehyde based synthetic tanning agent in thermo-mechanical and hydrodynamic behavior tanned collagen

Role of acrylic and melamine-formaldehyde based synthetic tanning agent in thermo-mechanical and hydrodynamic behavior tanned collagen

Author: 
Pankaj Kumar Tyagi, Pijush Kanti Chatopadhyay and Goutam Mukherjee
Abstract: 

Three different samples of cow softy leather (i.e. CSM0A0, CSM3A0 and CSM0A3) have been prepared from a chrome tanned cow wet blue of Indian origin. CSM0A0 is the control sample wherein neither melamine formaldehyde based nor polyacrylate based syntan has been added. CSM3A0 and CSM0A3 contain 3% melamine formaldehyde based and 3% polyacrylate based syntan, respectively in addition to the other common auxiliaries used in all three samples. Other physical and chemical operations are maintained same in all the three samples. Thermal, mechanical and hydrodynamic swelling behavior of these three samples have been studied, and tried to be correlated with the crosslinking densities of the samples. The hydrodynamic swelling behavior has been studied in three different solvents (e.g. water, toluene and xylene) assuming definite solvent-cow collagen interaction parameters, and crosslink densities have been evaluated by applying the Flory-Rehner equation. While studying the mechanical behavior, some distinguished theoretical models (e.g. Mooney-Rivlin, Flory, and Martin, Roth & Stiehler (MRS)) have been tried to be fit with the experimental results obtained in stress- stain analyses. In this process, few constants for cow Cr tanned leather have been derived, which has not been reported in the literature till date.

Paper No: 
17