Electron induced modification in polypropylene

Mishra, Rosaline; Tripathy, S.P.; Dwivedi, K.K.; Khathing, D. T.; Ghosh, S.; Müller, M.; Fink, D.

doi:10.1016/s1350-4487(01)00038-5

Cited by 39 publications

(27 citation statements)

References 8 publications

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“…Four peaks occur at 2θ ß14°, 16.94°, 18.5°, and 25.5°corresponding to (110), (040), (130), and (041) planes, respectively. 18,19 The XRD pattern of pristine PP sample conforms to the pattern reported by Mishra et al 20 The highly intense peak at 2θ ß16.94°signifies that the polymer is semicrystalline in nature. It is observed in case of carbonirradiated samples (Fig.…”

Section: X-ray Diffraction Studiessupporting

confidence: 85%

Impact of Swift Heavy Ions and Gamma Radiation upon Optical, Structural, and Chemical Properties of Polypropylene Polymer Films

Gupta

Singh

et al. 2015

Adv Polym Technol

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ABSTRACT:The present work focuses on the effects of two different ions (70 MeV carbon and 50 MeV lithium) and gamma radiation upon the structural, optical, and chemical properties of 125-μm thick polypropylene (PP) polymer films. The different samples of PP were irradiated with ions to the fluences in the range 10 11 -10 13 ions/cm 2 and exposed to gamma radiation of doses in the range 100-1250 kGy. A comparative study is carried out upon different parameters of irradiated polymer samples such as crystallite size and band gap energy. The structural properties are effectively modified by the ions irradiation, whereas gamma exposure shows insignificant changes in this regard; however, gamma exposure is observed to be effective in gradually decreasing the band gap energy of the PP samples with an increase in the gamma dose. The formation of new chemical bands is observed in the ion-irradiated and gamma-exposed PP polymer samples. C 2015 Wiley Periodicals, Inc. Adv Polym Technol 2015; View this article online at wileyonlinelibrary.com.

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Section: X-ray Diffraction Studiessupporting

confidence: 85%

Impact of Swift Heavy Ions and Gamma Radiation upon Optical, Structural, and Chemical Properties of Polypropylene Polymer Films

Gupta

Singh

et al. 2015

Adv Polym Technol

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“…Typical intense bands for polyolefins [43] are found for pristine surface, such as symmetric stretching vibrations of (C H) and (C C) at 2917 and 2845 cm , due to carbonyl stretch vibrations [44,45]. The intensity of this peak increased with aging, thanks to the insertion of environmental oxygen on the activated polymeric surfaces.…”

Section: Resultsmentioning

confidence: 99%

Extreme durability of wettability changes on polyolefin surfaces by atmospheric pressure plasma torch

Encinas

Díaz-Benito

Abenójar

et al. 2010

Surface and Coatings Technology

103

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Institutional RepositoryThis is a postprint version of the following published document: In the present work three common polyolefins: high density polyethylene (HDPE), low density polyethylene (LDPE) and polypropylene (PP) have been treated with an atmospheric pressure air plasma torch (APPT) in order to improve their wettability properties. The variations in surface energy (γ s ), as well as the durability of the treatment are determined by means of contact angle measurements for different aging times after plasma exposure (up to 270 days) using five test liquids which cover a wide range of polarities. The introduction of new polar moieties (carbonyl, amine or hydroxyl) is confirmed by Fourier transform infrared spectroscopy in attenuated total multiple reflection mode (ATR FTIR) and X ray photoelectron spectroscopy (XPS). Furthermore, scanning electron microscopy (SEM) provides information on the morphological changes and variation on surface roughness, revealing that smoother, lamellar and semispheric micrometric structures are created on the LDPE, HDPE and PP surfaces, respectively. Results show that APPT treatment enhances both the total and polar components of the γ s under study, with an unprecedent stability (N 8 months) in time.

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“…This is used in many applications such as radiation-sterilized medical and pharmaceutical components, food packaging materials and cosmetics [5]. A literature survey [6][7][8][9][10][11] indicates that effects of 14.89 MeV electron irradiation on polyethylene and polystyrene in the dose range of 57.6-576 KGy showed a greater red shift in absorption edge of polyethylene as compared to polystyrene [6]. Whereas, the enhancement in the thermal properties, dielectric constant, dielectric loss and crystallinity of 2 MeV and 1.5 MeV electron irradiated polypropylene has also shown considerable modifications [7,8].…”

Section: Introductionmentioning

confidence: 99%