FTIR spectroscopy study of the interaction between fibre of polyamide 6 and iodine

Maíllo, J.; Pagès, P.; Vallejo, E.; Lacorte, T.; Gacén, J.

doi:10.1016/j.eurpolymj.2004.11.030

Cited by 55 publications

(51 citation statements)

References 8 publications

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“…When acetone was experimented on as an organic medium, nylon film was found to absorb iodine smoothly and became brown; the iodine uptake by the nylon increased with increasing iodine concentration up to 0.10 mol·l A sound investigation on the effect of iodine treat ment on the FTIR spectral changes of nylon6 and des orbed nylon6 was undertaken by Maillo et al [217]. The treatment of a thoroughly prepared nylon6 with differ ent concentrations of aqueous I 2 /KI solutions revealed significant changes in the absorption bands of the differ ent kinds of amide group, resulting in a hydrogen bond breaking; a number of absorption bands were shifted either downward or upward with increasing or decreas ing intensities.…”

Section: Iodine-nylon Complexesmentioning

confidence: 99%

Molecular iodine/polymer complexes

Moulay

2013

Journal of Polymer Engineering

166

127

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A unique feature of molecular iodine by far, is its ability to bind to polymeric materials. A plethora of natural and synthetic polymers develop complexes when treated with molecular iodine, or with a mixture of mole cular iodine and potassium iodide. Many unexpected findings have been encountered upon complexation of iodine and the polymer skeleton, including the color formation, the polymer morphology changes, the compl exation sites or regions, the biological activity, and the electrical conductivity enhancement of the complexes, with poly iodides (I n¯) , mainly I 3¯ and I 5¯, as the actual binding species. Natural polymers that afford such complexes with iodine species are starch (amylose and amylopectin), chitosan, glycogen, silk, wool, albumin, cellulose, xylan, and natural rubber; iodinestarch being the oldest iodinenatural polymer complex. By contrast, numerous synthetic polymers are prone to make com plexes, including poly(vinyl alcohol) (PVA), poly(vinyl pyrrolidone) (PVP), nylons, poly(Schiff base)s, poly aniline, unsaturated polyhydrocarbons (carbon nano tubes, fullerenes C 60 /C 70 , polyacetylene; iodinePVA being the oldest iodinesynthetic polymer complex.

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Section: Iodine-nylon Complexesmentioning

confidence: 99%

Molecular iodine/polymer complexes

Moulay

2013

Journal of Polymer Engineering

166

127

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“…17,18 The absence of peak at 980 cm À1 indicates the absence of crystalline form. 17,18 Thus, it is conceivable that the PA 6 fibers used in the present study had only the crystalline form. The peaks at 830, 930 and 980 cm À1 showed a slight increase in intensity in the case of CPU2-PA6 fiber compared to the PA 6 fiber.…”

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confidence: 99%

High Performance Polyamide 6 Fibers Using Polycarbonate Based Thermoplastic Polyurethane Thin Film Coatings- a Novel Method

2009

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Polycarbonate based thermoplastic polyurethanes (CPU2) were prepared and coated onto polyamide 6 (PA 6) fibers. The CPU2 thin film coatings were prepared by dipping the PA 6 fibers into a viscous CPU2 adduct and cured at 100 C for 12 h. Both the tensile strength and the elongation at break of the CPU2 thin film coated PA 6 fibers (CPU2-PA6) increased although both the magnitudes of CPU2 are much lower than for the original PA 6 fibers. FE-SEM observation revealed that there existed an interface interaction region of 10 mm at the interface of PA 6 fiber and the CPU2 thin film coating. Generally speaking, it is considered that the break of PA 6 fibers is due to the formation of the micro-cracks on the fiber surface when it is under a tensile load. The coating of CPU2 onto the PA 6 fibers reduced the formation of micro-cracks during the elongation process, resulted in the improvement of the mechanical properties. Also, the CPU2-PA6 fibers when exposed to weathering tests to check the weathering resistance, showed an increase in the tensile strength for 0-50 h of exposure. This was due to the UV light induced crystalline transformation, i.e., from the crystalline phase to the crystalline phase. The CPU2-PA6 fibers almost retained the strength even after 200 h of exposure in a weatherometer. The crystalline transformations due to the UV irradiations have not been reported yet. Also, the CPU2 showed good adhesion property with the PA 6 films. The blending with various polymers or composites is generally employed for the performance enhancement of PA 6 fibers. On the contrary, the method employed in this study improved the performance of PA 6 fibers without changing its inherent morphological properties.KEY WORDS: Polyamide 6 Fiber / Polyurethane Thin Film / Coating / Micro-cracks / Interface Interaction / Plastic-type Break / Metallic-type Break / Weathering Tests / Polyamide fibers (PAs) are used for a wide variety of applications. They include the textile industry, engineering applications, biomedical and marine applications. The properties of PAs are the high melting point, good mechanical strength, good resistance to hydrocarbons, and the ease of fabrication and processing.1-3 However, the polyamide 6 (PA 6) fibers are prone to break under the mechanical stress due to the formation of micro-cracks on the surface. While, the polyurethanes are widely used in the coatings, adhesives, sealants, foams, elastomers and so on. Thermoplastic polyurethane elastomers are well known for their abrasion resistance, flexibility and high cohesive strength. [4][5][6] They are synthesized from the polymer glycol, diisocyanate and a chain extender. The final structure of polyurethane consists of a soft segment formed from the polymer glycol and a hard segment from the diisocyanate and the chain extender. The soft segment can be classified as an ether or ester series, including the carbonate ones. 7,8 Studies have been reported with polyamide in the thermoplastic elastomers or rubbers as blends. 9 The PA 6/acrylonitrile-butadiene-sty...

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“…Structural changes occur in the PA6 fiber when it is exposed to various surroundings [22,23]. FT-IR studies were conducted to analyze the structural changes that occurred in the PA6 fibers with the TPU coating.…”

Section: A Morphological Featuresmentioning

confidence: 99%

Structure and mechanical behaviors of thermoplastic polyurethane thin film coated polyamide 6 fibers part II. A solution coating method

John

Furukawa

2012

J Polym Res

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Thermoplastic polyurethane thin film (TPU) coated PA6 fibers were prepared by dipping fibers into a TPU solution. The thickness of the thin film coating was 20 μ m. A series of polymer glycols which include polycarbonate, polyether and polyester were used for the preparation of the TPU. Both tensile strength and elongation at break of the TPU coated fibers increased although both magnitudes of the TPUs are much lower than for the original PA6 fibers. Also there was a significant improvement in the abrasion resistance TPU coated PA6 fibers. The PA6 fibers are prone to micro-cracks when under mechanical stress but the TPU thin film coating delayed the formation of the micro-cracks, thereby improving the mechanical properties of PA6 fibers. The theoretical investigation on the effect of interface interaction region using the viscous flow model described could clearly explain the effect of the same on the mechanical performance of TPU coated PA6 fibers.

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FTIR spectroscopy study of the interaction between fibre of polyamide 6 and iodine

Cited by 55 publications

References 8 publications

Molecular iodine/polymer complexes

Molecular iodine/polymer complexes

High Performance Polyamide 6 Fibers Using Polycarbonate Based Thermoplastic Polyurethane Thin Film Coatings- a Novel Method

Structure and mechanical behaviors of thermoplastic polyurethane thin film coated polyamide 6 fibers part II. A solution coating method

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