Effect of Pro-degradant Additives Concentration on Aging Properties of Polypropylene Films

Islam, Naeemul; Othman, Nadras; Ahmad, Zulkifli; Ismail, Hanafi

doi:10.1080/03602550903413904

Cited by 21 publications

(11 citation statements)

References 14 publications

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“…Photo-oxidation process under UV irradiation started mainly with the formation of alkyl radicals from polymer molecular chains. The consequence of photo-oxidation of PP is the formation of hydroperoxides and different carbonyl species such as ketones, esters, and acids [15,[37][38] . Infrared spectrometry is a powerful tool for studying the degradation of polypropylene and several other polymeric materials in the solid states.…”

Section: Photo-degradation Of Pp and Pp Nanocompositesmentioning

confidence: 99%

The Effect of Encapsulation of Nano Zinc Oxide with Silica on the UV Resistance of Polypropylene

Wen

Wang

et al. 2011

Polymer-Plastics Technology and Engineering

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The objective of this study is to improve the performances of the ceramic UV stabilizers in polymer nanocomposites. Silica coated ZnO nanoparticles were prepared and melt blended into polypropylene (PP) matrix in order to introduce an inert silica shell between the ZnO and polymer chains as an isolation layer and protect this polymer against photodegradation. The UV resistance of the nanocomposites was evaluated by accelerated aging test. The results indicated that the photocatalytic activity of the ZnO particles was suppressed via encapsulating with silica. The coated ZnO could effectively improve the UV stability of the PP nanocomposites.

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Section: Photo-degradation Of Pp and Pp Nanocompositesmentioning

confidence: 99%

The Effect of Encapsulation of Nano Zinc Oxide with Silica on the UV Resistance of Polypropylene

Wen

Wang

et al. 2011

Polymer-Plastics Technology and Engineering

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“…The extent of degradation of these samples under the influence of metal additives has been quantified by calculating the CI, which is the ratio of the intensity of signals (1740/1456 cm −1 ) at different times of exposition. This increase in CI with time of exposure indicates an advance of the degradation reaction, as a result of the decomposition reactions of peroxides and hydroperoxides generated by the formation of free radicals responsible for the beginning of the degradation process, which has been observed on other polyolefins [22,31]. Figures 5-8 represent the change in the CI as a function of exposure time of UV light on the neat and formulated films.…”

Section: Ftir Studiesmentioning

confidence: 99%

A Comparative Study of the Photodegradation of Two Series of Cyclic Olefin Copolymers

Gutiérrez-Villarreal¹,

Zavala-Betancourt²

2017

International Journal of Polymer Science

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A series of commercial cyclic olefin copolymers (COC), namely, ethylene-norbornene (E-NB) and ethylene-tetracyclododecene (E-TD), were processed as thin films with thicknesses of 25 m by an extrusion process. The photodegradation of neat and formulated films with different metal stearates (Fe, Co, and Mn) was investigated using an ultraviolet (UV) light lamp (340 nm) for a period of 30 days in an accelerated weathering tester model QUV from Q-LAB according to the ASTM D 5208-01 standard practice. Changes in carbonyl index (CI) and tensile properties were used to evaluate the photodegradation of the films and other properties, such as variation by DSC, were also analyzed. The present study reveals that (E-NB) copolymers show higher sensitivity to photodegradation than (E-TD) resins, in the absence and presence of metal stearates. We also find that the Fe salt shows the highest oxidative activity.

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“…Petroleum‐based synthetic plastics have various uses in industry and in day‐to‐day life. They have become most desirable materials because of their properties, including its durability, high resistance, and low cost, and it can be easily manufactured and molded into various types of materials . These plastics have become a dangerous threat for living beings and ecosystem, highly affecting our earth because of its insubordinate nature, lack of degradability, and discarding issues .…”

Section: Introductionmentioning

confidence: 99%

“…A statistical analysis performed by Barnes stated that about 10% of metropolitan waste products are only plastic‐based and they do not easily degrade in the environment . A large amount of plastics have been disposed in landfills and water reservoirs, contaminating marine water, fresh water, and terrestrial and deserts habitats. Petro‐based plastics are inert to microbial degradation, and this makes them accumulate for many years in the environment and makes them hazardous to living beings.…”

Section: Introductionmentioning

confidence: 99%

“…Polyolefins, such as polypropylene (PP) and polyethylene (PE), are resistant to hydrolysis, oxidation, and biodegradation . However, the addition of prooxidants to polyolefins cause them to degrade by a free‐radical chain reaction and make them oxobiodegradable; this helps to promote abiotic (thermo or photo) and microbial degradation . Prooxidants are transition‐metal‐ion complexes added to polyolefins in stearates or other organic ligand complex forms.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced degradation properties of polypropylene integrated with iron and cobalt stearates and its synthetic application

Subramaniam

Sharma

Gupta

et al. 2017

J of Applied Polymer Sci

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Synthetic plastic leads to environmental contamination, and a promising solution to this problem is to use prooxidants as fillers within them to speed up the photooxidation and thermooxidation processes. This makes plastics more susceptible to biodegradation. In this study, the degradation properties of the widely used polymer polypropylene (PP) were improved by integration with cobalt stearate (CoSt 2 ) and iron stearate (FeSt 3 ) as prooxidants with accelerating weathering degradation. The metal stearates were blended with PP in the concentration range 0.1-0.9% w/w. The properties of the blends were studied by mechanical properties testing, thermogravimetric analysis, differential scanning calorimetry, and water absorption measurement. We performed the degradation properties and thermooxidative studies by conducting an accelerated weathering test on PP-metal salt blends. Fourier transform infrared spectroscopy and scanning electron microscopy analysis of the samples before and after the accelerated weathering test were performed to study the extent of degradation in PP-based metal salt blends. The results indicate that the tensile strength was inversely proportional to the concentration of metal stearates, and the samples showed an increased degree in polymer crystallinity (PPFe5 > PPCo5), and this led to the degradation of PP in less time. CoSt 2 predominantly enhanced the degradation of PP in comparison to FeSt 3 . Food containers and pots were constructed with the tailored polymers of PP in the injection-molding machine. Thus, metal-stearate-integrated polymers have great industrial potential to generate value-added products.

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Effect of Pro-degradant Additives Concentration on Aging Properties of Polypropylene Films

Cited by 21 publications

References 14 publications

The Effect of Encapsulation of Nano Zinc Oxide with Silica on the UV Resistance of Polypropylene

The Effect of Encapsulation of Nano Zinc Oxide with Silica on the UV Resistance of Polypropylene

A Comparative Study of the Photodegradation of Two Series of Cyclic Olefin Copolymers

Enhanced degradation properties of polypropylene integrated with iron and cobalt stearates and its synthetic application

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