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

Al–Salem, S.M.

doi:10.1016/j.matdes.2008.07.049

Cited by 58 publications

(34 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nessas aplicações, usualmente o polietileno é exposto ao intemperismo e a solicitações mecânicas [3,4] . Dentre as alternativas utilizadas para melhorar o desempenho térmico e mecânico das poliolefinas, a dispersão de camadas de silicatos lamelares tem se mostrado bastante promissora.…”

Section: Introductionunclassified

Nanocompósitos de Blendas HDPE/LLDPE e OMMT Parte I: Avaliação das Propriedades Termo-Mecânicas e da Resistência ao Intemperismo

Passador¹,

Backes²,

Travain³

et al. 2013

Polímeros

View full text Add to dashboard Cite

Resumo: Nanocompósitos de blendas de polietileno de alta densidade (HDPE) com polietileno linear de baixa densidade (LLDPE) e OMMT (montmorilonita organofílica) foram preparados sob fusão em extrusora de duplarosca, utilizando HDPE-g-MA como agente compatibilizante. A caracterização estrutural foi realizada por análises de difração de raios X em alto ângulo (WAXD), microscopia eletrônica de transmissão (MET). Os resultados indicam que a adição do agente compatibilizante favoreceu a formação da microestrutura predominantemente intercalada. Estudos dinâmico-mecânicos mostraram que a adição do agente compatibilizante aumentou as interações entre a carga e a matriz poliolefínica. As diferentes condições de intemperismo as quais os materiais foram submetidos influenciaram no comportamento mecânico dos nanocompósitos de blenda HDPE/LLDPE. Os tratamentos realizados em estufa com circulação forçada de ar e em água proporcionaram o alívio de tensões residuais presentes no sistema, enquanto que o tratamento realizado em câmara de envelhecimento acelerado levou à formação de grupos carbonílicos, de pequena massa molar, que diminuíram o grau de cristalinidade e o módulo elástico dos nanocompósitos. Palavras-chave: Nanocompósitos, HDPE/LLDPE, intemperismo. HDPE/LLDPE Blend-based Nanocomposites -Part I: Evaluation of Thermo-mechanical Properties and Weathering ResistanceAbstract: Nanocomposites from high density polyethylene/ linear low density polyethylene (HDPE/LLDPE) blends were prepared at the melt state in an extruder, using HDPE-g-MA as compatibilizer agent. The structural characterization was performed through wide angle X-ray diffraction (WAXD) and transmission electron microscopy (TEM). The results showed that adding the compatibilizer induced formation of a predominant intercalated microstructure. Dynamic-mechanical studies showed that the addition of the compatibilizer increases the interactions between the nanoclay surface and the polyolefin matrix. The weathering conditions affected the mechanical behavior of HDPE/LLDPE blend-based nanocomposites. Both treatments performed in hot water and in a forced convection air oven provided the relief of residual stresses in the polymer matrix, while the treatment in an accelerated aging chamber provided the formation of carbonyl groups that lead to a decreased degree of crystallinity and elastic modulus of the nanocomposites.

show abstract

Section: Introductionunclassified

Nanocompósitos de Blendas HDPE/LLDPE e OMMT Parte I: Avaliação das Propriedades Termo-Mecânicas e da Resistência ao Intemperismo

Passador¹,

Backes²,

Travain³

et al. 2013

Polímeros

View full text Add to dashboard Cite

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

“…A comprehensive study of the influence of accelerated and natural complex aging of LLDPE has been done by Al-Salem (2009). A significant change in haze percentage was observed after aging both the film with and without additives.…”

Section: Polyethylenementioning

confidence: 99%

Aging and Degradation of Printed Materials

Izdebska

2016

Printing on Polymers

View full text Add to dashboard Cite

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

Cited by 58 publications

References 8 publications

Nanocompósitos de Blendas HDPE/LLDPE e OMMT Parte I: Avaliação das Propriedades Termo-Mecânicas e da Resistência ao Intemperismo

Nanocompósitos de Blendas HDPE/LLDPE e OMMT Parte I: Avaliação das Propriedades Termo-Mecânicas e da Resistência ao Intemperismo

Untitled

Aging and Degradation of Printed Materials

Contact Info

Product

Resources

About