Specific Features of Thermal Degradation of Polypropylene in the Presence of Magnesium Hydroxide

Koverzanova, E. V.; Usachev, S. V.; Шилкина, Н. Г.; Ломакин, С. М.; Гумаргалиева, К. З.; Заиков, Г. Е.

doi:10.1023/b:rjac.0000031288.62488.04

Cited by 15 publications

(6 citation statements)

References 5 publications

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“…Among less ubiquitously present VOCs which are likely to consist of more VOCs from exogenous origins, only 2,4,6,8-tetramethyl-1-undecene showed differential detection rates between the CRC cases and controls after adjustment for multiple comparisons, being significantly lower in the cases. There is the sparse information regarding this compound, but the presence has been reported in certain medicinal plants and algae (59,60), while it could be a thermal degradation product from plastics (61). To date, there has been no solid data to link this VOC to any biological or clinical pathways.…”

Section: Discussionmentioning

confidence: 99%

Global Plasma Profiling for Colorectal Cancer-Associated Volatile Organic Compounds: a Proof-of-Principle Study

Kim

Yin

Prodhan

et al. 2019

Journal of Chromatographic Science

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Volatile organic compounds (VOCs) could reflect changes resulting from ongoing pathophysiological processes and altered body metabolisms, and thus have been studied for various types of cancers. We aimed to test an advanced global metabolomic technique to characterize circulating VOCs in patients diagnosed with colorectal cancer (CRC). We employed solid-phase microextraction (SPME) and comprehensive two-dimensional gas chromatography mass-spectrometry (GC × GC-MS). We analyzed 30 random plasma samples from incident cases of CRC. The 30 samples were from population controls enrolled in a large population-based case-control study. The number of metabolite peaks detected in the cases was significantly lower than that detected in the controls (median 1530 vs. 1694, P = 0.02). Partial least squares-discriminant analysis showed clear VOC profile differences between the CRC and the controls. After adjustment for multiple comparisons at the 5% false discovery rate level, five VOCs were differentially expressed between the cases and the controls. Among these five VOCs, 2,3,4-trimethyl-hexane (decreased) and 2,4-dimethylhept-1-ene (increased) were both lipid peroxidation products but not previously reported for CRC. In summary, this study pointed to an intriguing observation that the richness of volatile metabolites may be reduced in CRC cases and demonstrated the utility of SPME GC × GC-MS in discovery of candidate markers for further validation.

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Section: Discussionmentioning

confidence: 99%

Global Plasma Profiling for Colorectal Cancer-Associated Volatile Organic Compounds: a Proof-of-Principle Study

Kim

Yin

Prodhan

et al. 2019

Journal of Chromatographic Science

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“…The dehydrogenation of intramolecular and intermolecular cross-linking reactions caused by MgO may follow the sketch map shown in Fig. 5 [28].…”

Section: The Smoke Suppression Mechanism Of Mh On Asphalt Combustionmentioning

confidence: 98%

A TG-FTIR investigation into smoke suppression mechanism of magnesium hydroxide in asphalt combustion process

Huang

2010

Journal of Analytical and Applied Pyrolysis

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“…In the last few decades, work has been extensively reported on many aspects of inorganic flame retardant PP composites, including its flame retardancy, [4][5][6] mechanical properties, [7][8][9][10] processing, 11,12 thermal oxidative degradation, 13,14 and so on. Melt rheology is a branch of learning for studying the rheological behavior and mechanisms as well as the affecting factor during polymer processing.…”

Section: Introductionmentioning

confidence: 99%

Melt shear viscosity of PP/Al(OH)₃/Mg(OH)₂ flame retardant composites at high extrusion rates

Liang¹,

Yang²,

Tang³

2010

J of Applied Polymer Sci

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The melt apparent shear viscosity (g a ) of polypropylene (PP) composites filled with aluminum hydroxide [Al(OH) 3 ] and magnesium hydroxide [Mg(OH) 2 ] was measured by means of a capillary rheometer under experimental conditions of temperature ranging from 180 to 200 C and apparent shear rate varying from 10 to 2 Â 10 3 s À1 , to identify the effects of the filler particle content and size on the melt viscosity. The results showed that the melt shear flow of the composites obeyed the power law and presented pseudoplastic behavior. The dependence of g a on temperature was consistent with the Arrhenius equation. The sensitivity of g a for the composite melts to temperature was greater than that of the unfilled PP, and weakened with increasing apparent shear rate. The g a increased linearly with an increase of the weigh fraction of the flame retardant, especially in the low apparent shear rate region. The g a of the composites decreased slightly with an increase of particle size of flame retardant. Moreover, the variation for the g a with particle size of flame retardant was much less than with apparent shear rate under these test conditions.

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Specific Features of Thermal Degradation of Polypropylene in the Presence of Magnesium Hydroxide

Cited by 15 publications

References 5 publications

Global Plasma Profiling for Colorectal Cancer-Associated Volatile Organic Compounds: a Proof-of-Principle Study

Global Plasma Profiling for Colorectal Cancer-Associated Volatile Organic Compounds: a Proof-of-Principle Study

A TG-FTIR investigation into smoke suppression mechanism of magnesium hydroxide in asphalt combustion process

Melt shear viscosity of PP/Al(OH)₃/Mg(OH)₂ flame retardant composites at high extrusion rates

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Specific Features of Thermal Degradation of Polypropylene in the Presence of Magnesium Hydroxide

Cited by 15 publications

References 5 publications

Global Plasma Profiling for Colorectal Cancer-Associated Volatile Organic Compounds: a Proof-of-Principle Study

Global Plasma Profiling for Colorectal Cancer-Associated Volatile Organic Compounds: a Proof-of-Principle Study

A TG-FTIR investigation into smoke suppression mechanism of magnesium hydroxide in asphalt combustion process

Melt shear viscosity of PP/Al(OH)3/Mg(OH)2 flame retardant composites at high extrusion rates

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Product

Resources

About

Melt shear viscosity of PP/Al(OH)₃/Mg(OH)₂ flame retardant composites at high extrusion rates