Thermal oxidation of Linear Low Density Polyethylene

Iring, M.; Földes, Enikő; Barabás, Klára; Kelen, Tibor; Tüdős, F.; Ódor, Lujza

doi:10.1016/0141-3910(86)90036-4

Cited by 35 publications

(15 citation statements)

References 3 publications

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“…Keeping in view the carbonyl index and IR spectra of both the samples before and after aging, it was concluded that the aging process introduced some chemical modification in the sample "E" and the formation of oxygenated products was formed. This observation was in accord with the literature and that the oxidation rate of LLDPE was slightly higher than that of HDPE, despite the thickness of the samples film which may limit oxygen diffusion [23][24][25]. Figure 1.…”

Section: Ft Infrared Spectroscopic Analysissupporting

confidence: 91%

Characterization of Polyethylene Carrying Bags Before and After Isothermal Oxidative Aging in an Oven

Khurram¹,

Baloch²,

Simon³

et al. 2001

Rev. Chim.

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Utility of polymeric material is a major contribution to the production of waste, particularly in Pakistan. An easy escape to it is the damping in the land which is not commendable for an environmental point of view. On the other hand, the aging of polymer is analogous to its burial conditions under the soil in the absence of light. Therefore, in this research report, two different brands of polyethylene carrying bags were investigated. One sample was obtained from Pakistan abbreviated as sample `Y` while the other from Canada abbreviated as `E`. In order to accelerate the degradation process and to observe the impact of aging in a shorter span of time, these samples were heated at an elevated temperature (80�C) in an oven for the period of 20 days. The samples were characterized before and after aging with an interval of 2 days by applying different techniques like FT-IR, SEM, DSC, and thermogravimetric analysis (TGA). Carbonyl peak at 1715 cm-1 was observed only in the case of sample `E` displaying carbonyl index value as 28.45 % after 20 days of aging. The SEM images before and after aging revealed that the degradation took place at preferential sites in case of sample `Y` and at numerous sites in case of sample `E`. The results of percent crystallinity obtained by DSC showed an increasing pattern with aging for both the samples and was high in case of sample `E.` The activation energy determined by using Flynn-Wall-Ozawa showed a decreasing pattern for both the samples with aging. It concluded that the thermal aging initiates the process of degradation which was then accelerated by heating in TGA oven. The order of reaction was slightly decreased after aging for both the samples and was found to be independent of the heating rate.

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Section: Ft Infrared Spectroscopic Analysissupporting

confidence: 91%

Characterization of Polyethylene Carrying Bags Before and After Isothermal Oxidative Aging in an Oven

Khurram¹,

Baloch²,

Simon³

et al. 2001

Rev. Chim.

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“…However, these carbonyl indices are very minor in all the currently studied samples compared to, say, those found by Khabbaz and others 13 for LDPE. Iring and others 23 concluded that branched polyethylene (BPE, better known as LDPE) is more rapidly oxidized than linear polyethylene (LPE, better known as HDPE), due to the presence of tertiary carbon sites at each branch point. The relatively low value of carbonyl index found in the present study suggests that our polyethylene samples did not contain a high level of branching.…”

Section: Figure 1 Ir Spectra Of Am Ldpe-based Films (A) Ldpe; (B) Lmentioning

confidence: 99%

Characterization of antimicrobial films containing basil extracts

et al. 2006

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The properties of low-density polyethylene (LDPE)-based films containing either linalool or methylchavicol as antimicrobial (AM) additives were evaluated. Slight decreases in transparency, water vapour and oxygen transmission rates were found in the extruded films containing 0.34% w/w linalool or methylchavicol. The infrared (IR) spectra of the AM films were similar to that of additive-free LDPE film. However, carbonyl peaks could also be observed in the spectra of the AM films. There was no significant difference in the degree of crystallinity and the melting temperature range of the different films. Derivative thermogravimetry mass-loss curves showed that the thermal decomposition temperatures of the AM films were marginally lower than that of LDPE film. Electron micrographs indicated that AM LDPE-based films exhibited no evidence of changes in microstructure to suggest that linalool and methylchavicol were not evenly distributed in the film.

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“…This decrease in curing temperature of benzoxazine might be due to the catalytic effect of NiFe 2 O 4 towards the thermal curing of benzoxazine monomer [40][41][42][43] . In DSC thermogram of pure LLDPE an endothermic peak at 124 C due to its melting [35] and an exothermic peak at 224 C for its thermal oxidative decomposition [44,45] were observed (Fig. 3(c)).…”

Section: Thermal Analysismentioning

confidence: 86%

Preparation, Characterization and Properties of Flexible Magnetic Nanocomposites of NiFe₂O₄-polybenzoxazine-LLDPE

Rajput

Rahaman

Sarkhel

et al. 2013

Polymer-Plastics Technology and Engineering

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A simple method for the preparation of magnetic nanocomposites consisting of NiFe 2 O 4 nanoparticles, polybenzoxazine (PB), linear low-density polyethylene (LLDPE) and LLDPE-g-Maleic anhydride (LgM) is described. Composites were prepared by forming benzoxazine-NiFe 2 O 4 nanocomposites followed by melt blending with LLDPE and thermal curing of benzoxazine. The composites were characterized by XRD, DSC and TGA, FT-IR, SEM, UTM and VSM. The saturation magnetization of the composites containing 33.25 wt% NiFe 2 O 4 was 7.72 emu/g and it decreased with decreasing amount of NiFe 2 O 4 in the composite. The composite films exhibited mechanical flexibility as well as magnetic properties.

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Thermal oxidation of Linear Low Density Polyethylene

Cited by 35 publications

References 3 publications

Characterization of Polyethylene Carrying Bags Before and After Isothermal Oxidative Aging in an Oven

Characterization of Polyethylene Carrying Bags Before and After Isothermal Oxidative Aging in an Oven

Characterization of antimicrobial films containing basil extracts

Preparation, Characterization and Properties of Flexible Magnetic Nanocomposites of NiFe₂O₄-polybenzoxazine-LLDPE

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Thermal oxidation of Linear Low Density Polyethylene

Cited by 35 publications

References 3 publications

Characterization of Polyethylene Carrying Bags Before and After Isothermal Oxidative Aging in an Oven

Characterization of Polyethylene Carrying Bags Before and After Isothermal Oxidative Aging in an Oven

Characterization of antimicrobial films containing basil extracts

Preparation, Characterization and Properties of Flexible Magnetic Nanocomposites of NiFe2O4-polybenzoxazine-LLDPE

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Preparation, Characterization and Properties of Flexible Magnetic Nanocomposites of NiFe₂O₄-polybenzoxazine-LLDPE