Development of an Advanced Engineering Polymer from the Modification of Nylon 66 by e-Beam Irradiation

N. K. Pramanik; R. S. Haldar; U. K. Niyogi; M. S. Alam

doi:10.14429/dsj.64.7328

N. K. Pramanik Shriram Institute for Industrial Research, Delhi
R. S. Haldar Shriram Institute for Industrial Research, Delhi
U. K. Niyogi Shriram Institute for Industrial Research, Delhi
M. S. Alam Jamia Hamdard, Delhi

DOI: https://doi.org/10.14429/dsj.64.7328

Keywords: Nylon 66, e-beam irradiation, Radiation cross-linking, Polyurethane, Crosslink network

Abstract

When Nylon 66 was irradiated by an optimum dose of e-beam in presence of polyurethane as impact modifierin combination with triallyl isocyanurate as cross-linker, a superior performance was observed for the irradiatednylon 66. Significant improvement of properties, such as hardness, tensile strength, flexural modulus and impactstrength was obtained on radiation processing of nylon 66 by e-beam. More interestingly, percent water absorptionof such irradiated nylon 66 was reduced substantially. Improvement of mechanical properties and reduction of waterabsorption of irradiated nylon 66 were due to the cross-linking of the polymer system. Increase of cross-linkingwith dose of e-beam was verified by the increased gel content at higher doses. Irradiated nylon 66 showed betterdimensional stability than those achieved with pristine nylon 66. The increase in dimensional stability may beattributed to reduction in crystallinity with increasing dose of e-beam as revealed by DSC studies.

Defence Science Journal, Vol. 64, No. 3, May 2014, pp. 281-289, DOI:http://dx.doi.org/10.14429/dsj.64.7328

Author Biographies

N. K. Pramanik, Shriram Institute for Industrial Research, Delhi

Mr Nilay Kanti Pramanik completedMaster of Science in Polymer Science fromTezpur University, Assam. He is pursuing Ph.D from Jamia Hamdard on radiation processing of polyamides using gamma raysand e-beam. He has more than six years research experience in polymer processing and fabrication. Polymer characterization using state of the art instrumentation facilityis also a subject of his interest. He was the Young Scientist Award Winner in Engineering Sciences, 2010 organized by Indian Science Congress Association. He has six publications in international journal to his credit.

R. S. Haldar, Shriram Institute for Industrial Research, Delhi

Dr R.S. Haldar received his MTech (PolymerScience & Technology) and PhD from IIT Delhi. He is presently working as SeniorAssistant Director at Shriram Institutefor Industrial Research, Delhi. He has anexperience of twenty eight years in thefield of polymer processing technology. His areas of interest include: New product development in polymers, engineering polymers, polymer blends and alloys, radiation processing of polymers, shape memory polymers, shear thickening polymers, biocompatible polymers, bioresorbable polymers and morphology of polymers. He has published 30 research papers, filed two patents, edited two books.

U. K. Niyogi, Shriram Institute for Industrial Research, Delhi

Dr U.K. Niyogi obtained MSc (Tech)(Technology of Plastics) from U.D.C.T, Mumbai and was awarded PhD (Tech.) from University of Calcutta. He is presently working as Joint Director and Head, Material Science Division of Shriram Institute for Industrial Research, Delhi and engaged in various R&D projects on polymericmaterials, specialty chemicals and wasteutilization. He has more than thirty years of experience in the field of R&D, synthesis and processing of polymers and resins. He is life member of various professional institutes such as Institution of Materials, Minerals and Mining, U.K., Indian Plastics Institute, Indian Institute of Chemical Engineers, Institution of Engineers, India, etc. He has 47 research papers to his credit.