http://nopr.niscpr.res.in/handle/123456789/19200 2026-10-08T22:54:28Z http://nopr.niscpr.res.in/handle/123456789/19214 Title: Science and technology of man-made fibres: The Indian R&D scenario Authors: Bhat, N V; Teli, M D; Benjamin, Y N Abstract: The research and development work relating to the science and technology of man-made fibres covers a very wide field which includes the manufacture of fibre-forming polymers, conversion of polymer to fibres, manufacture of yarns and fabrics and their chemical processing. The R&D work being done in India in these different areas is briefly reviewed in this paper with particular reference to the significant work done during the past ten years or so. Though every attempt has been made to include the major contributions made by different groups in the country, the account is by no means comprehensive. Finally, some areas have been identified, particularly the weak and emerging areas, in which there is a definite need to strengthen the R&D base. Page(s): 116-122 1991-03-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/19213 Title: <span style="font-size:14.0pt;line-height: 115%;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; color:black;mso-ansi-language:EN-IN;mso-fareast-language:EN-IN;mso-bidi-language: HI" lang="EN-IN">Nature of crystals and their influence on fibre properties^a</span> Authors: Gupta, V B; Radhakrishnan, J Abstract: Some important structural and morphological aspects of crystals in polymeric fibres and their influence on the mechanical, thermal and optical properties of the crystal and the fibre are considered. These include the role of molecular architecture, crystal defects, nature of crystal-amorphous coupling, crystal content , crystal size and crystal orientation on the stiffness, strength, melting point, thermal expansion, birefringence, etc. Of the crystal and the fibre. Some important aspects of crystal formation are also discussed . The emphasis throughout is on poly(ethylene terephthalate) fibres. Page(s): 100-115 1991-03-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/19212 Title: Some recent advances in the production of acrylic fibres for specific end uses Authors: Bajaj, P; Paliwal, Dinesh K Abstract: Since the introduction of acrylic fibres as a wool-like apparel fibre to the textile market in the early 1950s, their applications have greatly diversified. Substantial modifications of the acrylic fibres are now possible at several points in the manufacturing route. These range from the selection of comonomers through changes in spinning conditions to specific thermal and chemical modifications. In this paper, some of the developments which have taken place in the recent past to tailor the properties of acrylic fibres for specific applications have been highlighted. Page(s): 89-99 1991-03-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/19211 Title: Some recent developments in the production of monomers and fibre-forming polymers Authors: Mukherjee, A K Abstract: Some significant developments of the past decade in the production of monomers and fibre-forming polymers have been reviewed with particular reference to nylon 6, poly(ethylene terephthalate), polyacrylonitrile and polypropylene. A brief reference is also made to the roles played by additives and other ingredients. Some developments which have led to better understanding of the effect of reaction parameters on process design and polymer properties have been briefly described. In cases where no significant developments have taken place, the established process of manufacture is briefly described. Page(s): 83-88 1991-03-01T00:00:00Z