Nylon 6,12 fibers under low-dose gamma irradiation
-
Carmina Menchaca-Campos
,
Gonzalo Martínez-Barrera
Abstract
One of the most important applications of gamma irradiation is in the area of polymer modification. Nylon fibers that were gamma-irradiated with a dose higher than 25 kGy show fusion temperature and fusion enthalpy higher than the nonirradiated nylon. Nevertheless, under certain applications, the influence of nylon-irradiated fibers is noticeable below 50 kGy; therefore, physicochemical characterization is indispensable. In the present work, nylon 6,12 crystalline fibers were irradiated at low dose (from 1 to 25 kGy) at environmental conditions to confirm the thermal behavior. The melting point and fusion enthalpy were measured with differential scanning calorimetry; structural changes were studied using infrared spectroscopy; and fiber surface morphology was studied using atomic force microscopy. The results show an increase in both fusion temperature and fusion enthalpy, which are effects of the newly ordered high-molecular-weight oligomers. Recrystallization and oligomer formation can be observed in infrared spectra. Such behaviors are directly related to the partial damage over the surface and the mechanical performance of manufactured composites.
©2011 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Original Articles
- Selecting process parameter in injection molding via simulation optimization
- A multicriteria simulation optimization method for injection molding
- Approach to develop a screw configuration for compounding solid fillers on a twin screw extruder using the example of polyethylene-layered silicate masterbatches
- WIT: how to visualise, analyse, and control hollow space formationa
- Effect of the glass fiber length on the mechanical properties of long glass fiber reinforced polyphenylene sulfide
- Thermodynamic study of poly(ethylene glycol) in water/acetone solutions by viscometry
- Polymerization of N-methyl B-methyl amino borazine
- Graft copolymerization of granular starch maleate with acrylamide for enhancing grafting efficiency
- Nylon 6,12 fibers under low-dose gamma irradiation
