Electron beam irradiated polyamide-6,6 films—II: mechanical and dynamic mechanical properties and water absorption behavior

Sengupta, Rajatendu; Tikku, V.K.; Somani, Alok K.; Chaki, T. K.; Bhowmick, Anil K.

doi:10.1016/j.radphyschem.2004.05.023

Cited by 22 publications

(15 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7). In the study of e‐beam irradiation of nylon 66 film, Sengupta and coworkers 8 also found that water uptake was less for the films that received a radiation dose of 200 and 500 kGy than the unirradiated film. Reduction of water absorption may be attributed to the crosslinking of polyamide molecules in nylon 66.…”

Section: Resultsmentioning

confidence: 98%

“…6 Ferro and Gondim 7 determined the crosslink density through equilibrium swelling of nylon 66 irradiated by e‐beam at different doses. Sengupta and coworkers 8 studied nylon 66 film irradiated by e‐beam at various doses and showed significant improvement of ultimate tensile stress, 10% modulus, elongation at break, and toughness over the unirradiated film. Aytac and coworkers 9 studied the efffects of gamma and e‐beam irradiation on nylon 66 and nylon 6 fabrics and found that the deterioration effect of gamma irradiation on mechanical properties of both the polymers was much higher than that of e‐beam irradiation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modification of nylon 66 by electron beam irradiation for improved properties and superior performances

Pramanik

Haldar

Bhardwaj

et al. 2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

Nylon 66 has been transformed into a material with significantly improved properties like hardness, tensile strength, and flexural modulus by processing it under the optimized dose rate of electron beam in the presence of suitable crosslinkers. Furthermore, percent water absorption of nylon 66 was reduced substantially on irradiation. Thermogravimetric analysis revealed that thermal stability of nylon 66 improved with increasing dose of radiation. Improvement of mechanical and thermal properties and reduction of water absorption of nylon 66 were due to the crosslinking of polyamide molecules made possible by the high energy radiation. Increase of crosslinking with increasing radiation dose was verified by the increase of gel content at higher doses. Differential scanning calorimetry showed that both melting and crystallization temperatures along with percent crystallinity of nylon 66 were decreased with the increasing dose of radiation leading to the development of more amorphous character in this semicrystalline polymer.

show abstract

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Modification of nylon 66 by electron beam irradiation for improved properties and superior performances

Pramanik

Haldar

Bhardwaj

et al. 2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…At high doses (200 kGy and above), all the dissolved oxygen gets consumed and fresh oxygen cannot diffuse in from the outside of PE bag fast enough to replace it so that further peroxidation ceases. [5] Thus, the increase of gel content slows down with the increasing of radiation dose when it reached above 200kGy, because the crosslinking reaction and the decomposition reaction coexist, and at high doses the decomposition reaction became substantial. In addition, it can be found at the same dose, the greater the BDIS molecular weight is, the more the gel content is, and the better the radiation crosslinking is.…”

Section: Gel Contentmentioning

confidence: 99%

Study on Radiation Crosslinking of a Bio-based Polyamide�I: Characterization by X-ray Diffraction

Zhang¹,

Jia²,

Shao³

2015

Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering

View full text Add to dashboard Cite

Abstract. Biomass is a feasible substitute for petrochemicals, providing many of the same chemical building blocks that are required to fabricate durable and high-performance materials. In this paper, the radiation crosslinking of a bio-based polyamide has been investigated over a range of irradiation dose (50-250 kGy) with limited air. The crystallinity variations were studied using infrared (IR) spectroscopy and X-ray diffraction (XRD). The presence of both α and γ phase was seen in all the polyamide fibers at room temperature. Generally, the irradiated BDIS fibers had lower crystallinity levels than that in the unirradiated one (F0) except for the fibers irradiated at the dose of 200kGy (F200). F200 possessed the maximum crystallinity. In addition, gel content of the irradiated fibers was measured. It was concluded that the relation between sol fraction and radiation dose followed the Charlesby-Pinner equation, the ratio of degradation to crosslinking (p 0 /q 0 ) decreased with the increase of molecular weight.

show abstract

“…Radiation crosslinking of nylon has been reported by various researchers, where in most of the cases extruded films, yarns or fibers have been used [4][5][6][7]. In our earlier studies we have carried out detailed investigation on high energy radiation processing on injection moulded nylon 6 and nylon 66 specimens [8][9].…”

Section: Introductionmentioning

confidence: 99%

Electron Beam Irradiation of Nylon 66: Characterization by IR Spectroscopy and Viscosity Studies

Pramanik¹,

Alam²,

Kh³

2015

IJIRSET

View full text Add to dashboard Cite

ABSTRACT:Effects of e-beam irradiation at different doses upto 600 kGy on injection moulded nylon 66 specimens have been investigated by solution viscosity measurement and Fourier Transform Infrared (FTIR) spectroscopy. The results of gel content and viscosity indicate that e-beam irradiation generates crosslinked structure among the polymer chains. The uncrosslinked sol portion of the irradiated nylon 66 was also affected and resulted in a decrease in chain length as reflected in the results obtained from viscosity measurement. From FTIR spectra analysis, it was found that crystallinity of nylon 66 was considerably affected upon e-beam irradiation. The decrease of N-H stretch absorbance value of irradiated nylon 66 in comparison to the pristine nylon 66, indicates the loss of hydrogen bonding due to irradiation which resulted in decrease in crystallinity.

show abstract

Electron beam irradiated polyamide-6,6 films—II: mechanical and dynamic mechanical properties and water absorption behavior

Cited by 22 publications

References 15 publications

Modification of nylon 66 by electron beam irradiation for improved properties and superior performances

Modification of nylon 66 by electron beam irradiation for improved properties and superior performances

Study on Radiation Crosslinking of a Bio-based Polyamide�I: Characterization by X-ray Diffraction

Electron Beam Irradiation of Nylon 66: Characterization by IR Spectroscopy and Viscosity Studies

Contact Info

Product

Resources

About