Effect of Drawing and Texturizing on the Molecular-Weight Distribution of Nylon 6 Multifilament Yarns

Abstract

The effects of drawing and texturizing on the molecular weight distribution of nylon 6 multinlament varns were studied Results obtained through viscometry were later contirmed by spectra findings and differential dye uptake as observed by spectrophotometer.

Chain scission occurs during drawing and texturizing of nylon 6 multihlament varn as a result of mechanochemical degradation of polymer.

On raising the heater temperature, thermochemical activation causes recombination of reactive species resulting in solid polymerization of nylon 6 macromolecules.

During texturization, both chain scission and solid polymerization take place simultaneously. At lower heater temperatures, the extent of chain scission of nylon 6 macromolecules is predominant, while at higher heater temperature, the degree of solid polymerization is more pronounced.

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References

Flory, P.J. , Polymerization of Unsaturated Monomers by Free-Radical Mechanisms, in "Principles of Polymer Chemistry," New York, Cornell University Press, 1953, Ch. IV, pp. 106-174.

Fujimoto, F. and Yamashita, M. , Thermal Treatment of Nylon 6 Fiber with Super-Heat under Atmospheric Pressure , J. Textile Mach. Soc. Japan 17, 124-129 (1971) (English).

Johnson, W.R. and Price, C.C. , Shear Degradation of Vinyl Polymers in Dilute Solution by High-Speed Stirring, J. Polymer Sci. 45, 217-225 (1960).

Juilfs, Von J. , Zur fraktionierten Fallung Von Polyamiden, Kolloid Zt. 141, 88-94 (1955).

Kato, K. , Furukawa, K. , and Yoshizaki, O. , Mechanical Scission of Nylon 6 Molecules during Drawing Process. I: The Effects of the Ways of Loading and Drawing on Scission, Kobunshi Kagaku 28(316), 687-692 (Aug. 1971 ).

Kato, K. , Furukawa, K. , and Yoshizaki, O. , Mechanical Scission of Nylon 6 Molecules during Drawing Process II: Change of Molecular Weight and Molecular Weight Distribution and Discussions on the Mechanism of the Scission, Kobunshi Kagaku 28(316), 693-700 (Aug. 1971).

Kuz'minskii, A.S. , Mechanochemical Processes in Polymers, in "The Ageing and Stabilization of Polymers," New York, Elsevier , 1971, Ch. III, pp. 48-84.

Mark, H. and Raff, R. , "High Polymerie Reactions," New York- London, Interscience, 1941.

Ott, R.L. , Mechanism of the Mechanical Degradation of Cellulose, J. Polymer Sc. (PartA) 2, 973 982 (1964).

10.

Srhaefgen, J.R. and Flory, P.J. , Synthesis of Multichain Polymers and Investigations of their Viscosities, J. Amer. Chem. Soc. 70, 2709-2718 (1948).

11.

Tsuruta, M. , Koshimo, A. , and Tagawa, T. , Steam and Heat-Setting of Nylon 6 Fiber. III: Changes in Viscosity and Amino and Carboxyl End-Groups by Heat-Setting, J. Appl. Polymer. Sci. 9, 25-29 (1965).

12.

Volokhina, A.V. , Kudryavtsev, G.I. , Skuratov, S.M. , and Bonetskaya , A.K. , The Polymerizatio Process in the Solid State, J. Polymer Sci. 53, 289 294 (1961).