NOPR Collection:

Some New Metal Complex Solvents for Use as Analytical Agents for Wool and Silk

2016-07-20T05:12:52Z

Title: Some New Metal Complex Solvents for Use as Analytical Agents for Wool and Silk Authors: Achwal, W. B.; Gore, H. J.; Jain, P. C.; Mohite, V. P. Abstract: Cadoxen and zincoxen solvents have been found to dissolve wool and silk fibres. The dye content of the dyed material can be estimated by colorimetry of the solutions. With most dyeings, except yellow and orange, the cadoxen method is preferable. The extent of canary yellow coloration can he estimated using zincoxen. Wool solutions have extremely low specific viscosity and wool cannot be reprecipitated. Paper chromatography as well as TLC indicates the absence of amino acids. Light scattering measurements, however, show that wool molecules dissolved in zincoxen retain their polymeric nature. Page(s): 34-36

Differential Response of Cotton Fibres to Easy-Care Finishing

2016-07-20T05:08:13Z

Title: Differential Response of Cotton Fibres to Easy-Care Finishing Authors: Venkatesh, Gopady M. Abstract: The improvements in crease recovery angles and the concomitant tensile losses as a result of formaldehyde cross linking aimed at imparting easy-care properties to cotton fibres widely differing in fineness, length and breaking strength and extension have been compared. The fineness, length and breaking strength in the decreasing order of importance appear to influence the response of cotton fibres to easy-care finishing. The fine, long staple cotton fibres exhibit a better balance of properties with regard to crease recovery and tensile loss than the coarse, short staple cottons. Limited observations on cottons treated with DMDHEU also lead to similar conclusions. Page(s): 31-33

Response of Short Staple Indian Cottons to Crosslinking

2016-07-20T05:03:49Z

Title: Response of Short Staple Indian Cottons to Crosslinking Authors: Venkatesh, Gopady M.; Shah, Nila M. Abstract: The wrinkle resistance and tensile properties of untreated as well as formaldehyde cross linked short staple Indian cottons differing widely in fineness have been measured. The results show that fine cottons exhibit a marginally better balance of crease recovery and tensile properties than coarser cottons, more or less of the same staple length and strength. Page(s): 29-30

Modification of Nylon 6 Using Sulphuryl Chloride

2016-07-20T04:56:18Z

Title: Modification of Nylon 6 Using Sulphuryl Chloride Authors: Varma, D. S.; Eapen, Thomas Abstract: Nylon 6 fibres were modified by reacting them with sulphuryl chloride in benzene. The extent of reaction was evaluated by measuring the increase in the weight of modified samples. The effect of duration of the reaction, reagent concentration, temperature and atmosphere was investigated, and the physical characteristics of the modified fibres were compared with those of the parent fibre. There was a marginal increase in the density and moisture regain of the modified samples with increase in add-on, while a decrease was observed in breaking strength and modulus. There was no appreciable change in elastic recovery and elongation, but a slight improvement in the thermal stability of the modified fibres. Page(s): 26-28