Natural weathering test for films of various formulations of low density polyethylene (LDPE) and linear low density polyethylene (LLDPE)

Basfar, Ahmed A.; Ali, K. M. Idriss

doi:10.1016/j.polymdegradstab.2004.11.027

Cited by 81 publications

(48 citation statements)

References 5 publications

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“…The UVA additives stabilized the polymer chains against harsh weathering conditions giving better color parameter results [3,4]. Under both natural and accelerated weathering, C3 films showed resilience to change in color.…”

Section: Total Change In Color (Dt) Haze and Transmissionmentioning

confidence: 99%

“…In previous works [3,4], weathering via accelerated and natural routes was used to have a better understanding of polymer integrity. After submission to accelerated weathering (with and without water spray) and natural exposure, PVC (polyvinylchloride) films of different formulations had an increase in surface resistance to harsh weather conditions.…”

Section: Introductionmentioning

confidence: 99%

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Influence of natural and accelerated weathering on various formulations of linear low density polyethylene (LLDPE) films

Al–Salem

2009

Materials & Design

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Section: Total Change In Color (Dt) Haze and Transmissionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of natural and accelerated weathering on various formulations of linear low density polyethylene (LLDPE) films

Al–Salem

2009

Materials & Design

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“…Elongation at break and also ultimate tensile strength are considered to be significant tensile properties which are more sensitive to photo-oxidation process in polyethylene films [25][26][27][28][29]. Both of ε r and S r for all formulated films increase firstly in the early stages of photooxidation and then decrease steadily until the samples become brittle.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Study on the effect of galbanic acid on photo-oxidative degradation of linear low density polyethylene (LLDPE) films

Jahanmardi

Assempour

2008

E-Polymers

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Photo-oxidative degradation of LLDPE films (~ 250 μm thick) containing varying amounts of galbanic acid (a type of coumarin derivatives) was investigated by exposing the films to an artificial sunlight (emitted by 300 W OSRAM UltraVitalux lamps) at 40 ○ C for extended time periods. Photo-oxidative degradation of the neat polymer film and the LLDPE films containing benzophenone (an active photo-initiator for PE) and coumarin alone were also studied under similar conditions for comparison. The rate of photo-oxidation was assessed by measuring tensile properties, gel content, carbonyl index, molecular weight and density. It was shown that galbanic acid was highly effective in accelerating photo-oxidation of LLDPE films and an outstanding acceleration of photo-oxidation was observed for the film containing 0.2 wt % of galbanic acid in comparison with the film containing the same amount of benzophenone. However, the film containing coumarin did not exhibit considerable difference in behaviour in photo-oxidation relative to the neat LLDPE film during the exposure time. On the basis of the obtained results, the prooxidant activity of galbanic acid was described in terms of activity of the functional groups existing in the substituted moiety of its molecules.

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“…polymer-addition, polymerization and poly-condensation) are all reversible in theory, energy or heat supply can cause photo-oxidation and/or mechanical stresses which occur as a consequence [23]. Length or branching of polymer chains can also occur from the formation of oxidized compounds and/or harsh natural weathering conditions [20,24,25]. Due to the previously stated reasons, it is very important to have a customer ready to purchase the product to achieve a sensible economic and environmental practice.…”

Section: Mechanical Recyclingmentioning

confidence: 99%

Untitled

2017

International Journal of Chemical and Process Engineering Resea

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Article HistoryThe large amount of post-consumer polyethylene terephthalate (PET) bottles/containers and post-consumer sachet water nylon currently generated in Lagos State makes imperative the search for alternative procedures for treating, recycling or reuse of these waste materials. This is because they are not biodegradable and constitute environmental and health threat to the survival of man and other living things. The sustainable approach to municipal solid waste management in Nigeria is being considered. This research work aimed at recycling of post-consumer PET bottles/containers and post-consumer sachet water nylon to produce composite materials for engineering applications and wastes storage bag (wastes bin) respectively. Plastic waste, polyethylene terephthalate (PET) bottles/containers and sachet water nylon coming from the dumpsites in Lagos State in Nigeria were collected, separated, washed, recycled, extruded and characterized. The products obtained were subjected to tests to evaluate their mechanical properties using Introns Tester Model 1122. The results showed that the PET/LDPE blend mechanical properties depend on the processing conditions and apparatus. High processing temperature and high residence times strongly enhance the degradation processes and reduce the mechanical properties, in particular the elongation at break. However, by introducing additives, such as antioxidants, inert fillers and impact modifiers, these mechanical properties are improved and approached those products made from of virgin polyethylene terephthalate. For the recycled sachet water nylon, the results also showed that there was mechanical properties deficiency in the use of recycled resins and that this deficiency could be minimized through adequate blending with virgin resins. In general, provided that optimal reprocessing conditions with suitable additives, the mechanical properties of the recycled resins are near to those of virgin resins.Contribution/Originality: This study could be able to address the burden of disposed some of these plastic bottle /nylon litter and block the drainages. Also help in area of employment because many idle hands can engage in picking the waste for recycle.

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Natural weathering test for films of various formulations of low density polyethylene (LDPE) and linear low density polyethylene (LLDPE)

Cited by 81 publications

References 5 publications

Influence of natural and accelerated weathering on various formulations of linear low density polyethylene (LLDPE) films

Influence of natural and accelerated weathering on various formulations of linear low density polyethylene (LLDPE) films

Study on the effect of galbanic acid on photo-oxidative degradation of linear low density polyethylene (LLDPE) films

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