Thermal oxidative degradation of additive-free polypropylene pellets investigated by multichannel Fourier-transform chemiluminescence spectroscopy

Yano, Ayako; Akai, Nobuyuki; Ishii, Hiroshi; Satoh, Chikahiro; Hironiwa, Takayuki; Millington, Keith R.; Nakata, Munetaka

doi:10.1016/j.polymdegradstab.2013.09.031

Cited by 12 publications

(7 citation statements)

References 24 publications

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“…The wavelengths of over 290 nm are sufficient to start the degradation and create discoloration, chalking, and embrittlement of polypropylene. Therefore, assessment of the service life of polypropylene in the natural environment is a well-established practice [68]. Under ultraviolet irradiation cause fast degradation of the polypropylene while the weakening of its strength occurs under sunlight.…”

Section: Degradation Of Polypropylenementioning

confidence: 99%

“…Formation of carbonyl, carboxyl, and functional groups decreases the hydrophobicity of the surface and hence favors biodegradation. Limited studies showing biodegradation of polypropylene under various conditions has been summarized (Table 6 [61-67] and 7 [68,[71][72][73][74]). Table 7 Changes found in the literature for PP after exposure to different biodegradation conditions [68,[71][72][73][74].…”

Section: Degradation Of Polypropylenementioning

confidence: 99%

“…Limited studies showing biodegradation of polypropylene under various conditions has been summarized (Table 6 [61-67] and 7 [68,[71][72][73][74]). Table 7 Changes found in the literature for PP after exposure to different biodegradation conditions [68,[71][72][73][74]. 4.…”

Section: Degradation Of Polypropylenementioning

confidence: 99%

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Plastic Degradation and its Environmental Implications

Shanker

Rani

2021

Degradation of Plastics

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Extensive use of non-biodegradable plastic by anthropogenic activities is posing a severe threat to the global environment in the form of massive waste disposal and problems of closed-landfill sites and rising water and land pollution. Organisms are facing challenge to their lives once they consume plastic in the form of food. In addition, the plastic debris may have additive chemicals having possibility to leach out. Therefore, proper degradation of plastic to lessen negative environmental implications is necessary. Earlier the people were ignorant about this problem however, now-a-days, people are serious about its negative impact. Hence, biodegradable plastics are coming into the trend in the market. Interaction of plastic (adsorbing characteristics) with the environment results in new functional groups on its surface in a dynamic situation. In these circumstances, oxygenated, thermal, bio-based, and photocatalytic degradation of plastics is in high demand. Usually, different-rates along with diverse-pathways have been found in variable polymers like polyethylene, polypropylene, and polyethylene terephthalate. Polyethylene photo-degradation resulted in sharp infrared-peaks of ketones, esters, and acids due to oxidation reaction. Hydrogen peroxide is generated by oxidative action on methylene groups in the backbone of polyethylene terephthalate. The present chapter will provide compiled information about various polymers used in plastic as well as environmental concerns of plastic, finally the chapter concludes with comprehensive details about the degradation of various types of plastics. State-of-the-art on degradable plastics market with an emphasis on principle design for recyclable plastics and biodegradable plastics from renewable raw materials are also included. Factors affecting plastic degradation and metabolic pathways including past and present scenarios have also been discussed in this chapter.

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Section: Degradation Of Polypropylenementioning

confidence: 99%

Section: Degradation Of Polypropylenementioning

confidence: 99%

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Plastic Degradation and its Environmental Implications

Shanker

Rani

2021

Degradation of Plastics

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“…Recently we have investigated the thermal oxidative degradation of polymers such as polyamides [1], polypropylene [2,3] and elastomers [4] using our multichannel Fourier-transform luminescence spectrometer composed of a CCD sensor and an interferometer combined with a Savart plate sandwiched between two linear polarizers and a quartz lens [5,6]. As a result, for example, the time evolution of the thermal chemiluminescence (TCL) of polypropylene was evaluated by deconvolution of the observed spectra into three emission bands [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…As a result, for example, the time evolution of the thermal chemiluminescence (TCL) of polypropylene was evaluated by deconvolution of the observed spectra into three emission bands [2,3]. However, the obtained time evolution of the peak wavelength and peak intensity for each emission band was complex and the emission mechanisms have been difficult to clearly establish.…”

Section: Introductionmentioning

confidence: 99%