Morphology and chemical properties of polypropylene pellets degraded in simulated terrestrial and marine environments

Tang, Chih-Cheng; Chen, Huey-Ing; Brimblecombe, Peter; Lee, Chon‐Lin

doi:10.1016/j.marpolbul.2019.110626

Cited by 54 publications

(30 citation statements)

References 32 publications

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“…No negative effect of this temperature on the polypropylene yarn was observed. Our findings are in agreement with those received by most studies on the properties of polypropylenes material, in which stated that a softening point occurs about 150°C, a melting point at about 160°C and at temperature below 120°C polypropylene remain its normal properties (Li et al, ; Tang, Bao, Roy, Wang, & Su, ; Tang, Chen, Brimblecombe, & Leea, ). The use of modifiers raises the polymerization temperature by an average of 6°C (1–9.8°C).…”

Section: Discussionsupporting

confidence: 92%

Implant system for treatment of the orbital floor defects of blowout fractures in the maxillofacial region using polypropylene yarn and bioactive bone cement

et al. 2020

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Fractures in the craniofacial region are a serious problem in terms of treatment. The most reasonable solution is the use of individual implants dedicated to a specific patient. The aim of this study was to develop the implant system specifically for treatment of the orbital floor defects of blowout fractures of maxillofacial region, using polypropylene yarn and bone cement. Three types of bone cement were used to fix the polypropylene yarn: unmodified, antibiotic‐loaded, and modified with nanometals. The following research was carried out: selection of cement production parameters, assessment of the curing time, measurement of polymerization temperature, an analysis of microstructure and surface topography, evaluation of wettability, measurement of microhardness, and studies of bactericidal effectiveness. The research confirms the possibility of using bone cement and polypropylene yarn for an individual implant, dedicated to the fractures treatment in the maxillofacial region. Moreover, the bactericidal properties of the proposed modifications for bone cement have been verified; hence, bioactive cements are recommended for use in the case of infectious complications.

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Section: Discussionsupporting

confidence: 92%

Implant system for treatment of the orbital floor defects of blowout fractures in the maxillofacial region using polypropylene yarn and bioactive bone cement

et al. 2020

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“…The interior materials in the automobiles contain PP, Polyethylene (PE), Acrylonitrile Butadiene Styrene copolymer (ABS) and polyurethane (PU) and so forth, which will inevitably suffer from sunlight during the use of the automobile [33][34][35]. Therefore, the influence of photoaging on VOCs is very important.…”

Section: Introductionmentioning

confidence: 99%

Formation and Emissions of Volatile Organic Compounds from Homo-PP and Co-PP Resins during Manufacturing Process and Accelerated Photoaging Degradation

Peng

Yan

et al. 2020

Molecules

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Volatile organic compounds (VOCs) from polypropylene (PP) seriously restricts the application of PP in an automotive field. Herein, the traceability of VOCs from PP resins during manufacturing process and accelerated photoaging degradation was clarified on basis of an accurate characterization method of key VOCs. The influence of PP structures on changing the accelerated photoaging degradation on the VOCs was systematic. The VOCs were identified by means of Gas chromatography (GC) coupled with both a hydrogen flame ion detector (FID) and a mass spectrometry detector (MSD). Results showed that both the molecular structure of PP and the manufacturing process affected the species and contents of VOCs. In addition, the photoaging degradation of PP resulted in a large number of new emerged volatile carbonyl compounds. Our work proposed a possible VOC formation mechanism during the manufacturing and photoaging process. VOCs from PP resins were originated from oligomers and chain random scission during thermomechanical degradation. However, β scission of alkoxy radical and Norrish tape I reactions of ketones via intermediate transition were probably the main VOCs formation routes towards PP during photoaging degradation. This work could provide scientific knowledge on both the accurate traceability of VOCs emissions and new technology for development of low-VOCs PP composites for vehicle.

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“…It possesses unique properties and has various applications in industries, including clothing, packaging, automotive, household appliances, and packaging. 30 Wide adoption arises from its versatile properties and relatively low price. 31 It comes in second place after polyethylene with its high-density polyethylene (HDPE), lowdensity polyethylene (LDPE), and linear low-density polyethylene (LLDPE) in production and use.…”

Section: Introductionmentioning

confidence: 99%

“…One of the most popular thermoplastic polymers is polypropylene (PP). It possesses unique properties and has various applications in industries, including clothing, packaging, automotive, household appliances, and packaging 30 . Wide adoption arises from its versatile properties and relatively low price 31 .…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of nano‐bentonite and nanocadmium oxide doping concentrations on assembly, characterization, and enhanced gamma‐rays shielding properties of polypropylene ternary nanocomposites

et al. 2021

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It has been confirmed from an experimental, as well as a theoretical, standpoint that metal oxide polymer nanocomposites (MPNCs) represent a new category of advanced materials effective in radiation shielding. In this study, novel (PP/CdO-NPs-NBent) ternary nanocomposites were designed, based on doping polypropylene (PP) with two different nanofillers, namely cadmium oxide nanoparticles (CdO-NPs) and nano-bentonite (NBent), to function as promising alternatives for γ-ray shielding. The PP/(x)CdO(40-x)NBent nanocomposites samples for x = 0.0, 10.0, 20.0, 30.0, and 40.0 wt% filling concentration were fabricated using the compression molding technique. The surface morphology of the nanoparticles, as well as the corresponding nanocomposites, along with their structural and thermal characteristics was studied using TGA, XRD, SEM, and FT-IR. A NaI detector was used along with different γ-ray photon energies

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Morphology and chemical properties of polypropylene pellets degraded in simulated terrestrial and marine environments

Cited by 54 publications

References 32 publications

Implant system for treatment of the orbital floor defects of blowout fractures in the maxillofacial region using polypropylene yarn and bioactive bone cement

Implant system for treatment of the orbital floor defects of blowout fractures in the maxillofacial region using polypropylene yarn and bioactive bone cement

Formation and Emissions of Volatile Organic Compounds from Homo-PP and Co-PP Resins during Manufacturing Process and Accelerated Photoaging Degradation

Synergistic effect of nano‐bentonite and nanocadmium oxide doping concentrations on assembly, characterization, and enhanced gamma‐rays shielding properties of polypropylene ternary nanocomposites

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