FTIR and Thermal Studies on Nylon‐66 and 30% Glass Fibre Reinforced Nylon‐66

Abstract

The present study deals with the characterization of the polymeric materialsviz.,nylon-66 and 30% glass fibre reinforced nylon-66 (GF Nylon-66) by employing FTIR and thermal measurements. The complete vibrational band assignment made available for nylon-66 and GF nylon-66 using FTIR spectra confirm their chemical structure. FTIR spectroscopy provides detailed information on polymer structure through the characteristic vibrational energies of the various groups present in the molecule. The thermal behavior of nylon-66 and GF nylon-66 essential for proper processing and fabrication was studied from TGA and DTA thermograms. The thermal stability of the polymers was studied from TGA and the activation energy for the degradation of the polymeric materials was calculated using Murray-White plot and Coats-Redfern plot. The polymer with high activation energy is more thermally stable. GF nylon-66 is found to be more thermally stable than nylon-66. The major thermal transitions such as crystalline melting temperature (Tm) and degradation temperature (Td) of the polymers were detected from DTA curves. The melting behaviour of the polymer depends upon the specimen history and in particular upon the temperature of crystallization. The melting behaviour also depends upon the rate at which the specimen is heated. The various factors such as molar mass and degree of chain branching govern the value of Tmin different polymers.

Size and Aging Effects on Antimicrobial Efficiency of Silver Nanoparticles Coated on Polyamide Fabrics Activated by Atmospheric DBD Plasma

“…The peaks at 2920 and 2850 cm −1 are related to the CH 2 asymmetric and symmetric stretching vibrations, respectively, whereas the absorption band at 1630 cm −1 was assigned to the amide carbonyl CO stretching vibration of the secondary amide band (amide I). 19 The amide II band at 1540 cm −1 may be attributed to the N−H bending motion and the band at 680 cm −1 to the bending of the OC−N group. 20 After plasma treatment, significant increases in the intensity and broadening of the CO stretching band (as well as of the bending of the OC−N group) were observed.…”

A novel approach for application of nylon membranes in the biosensing domain

“…5. Amide groups that exist in nylon structure can be recognized in FTIR spectra from peaks located at 1660 and 1541 cm −1 , which correspond to the amide I and II bands, respectively [31]. Detected wavelengths of the dominant bands in the range of 2800-3500 cm −1 originate from the combination of different types of C-H stretching vibrations [32].…”

In vivoevaluation of a mucoadhesive polymeric caplet for intravaginal anti-HIV-1 delivery and development of a molecular mechanistic model for thermochemical characterization

“…Studies have shown that the science of blending polymers and yet be able to reserve their individual properties in the final blend is a novel and desirable process for developing new structural materials [1][2][3][4] . The mechanical, physical and chemical properties of a polymer are dependent upon the structure and organization of their macromolecules 5,6 . Therefore thorough characterization of the molecular order of a polymer is an imperative undertaking in polymer blend research 7 .…”