Structural Features of Atactic Polypropylene

Nekhoroshev, V. P.; Popov, E. A.; Nekhorosheva, A. V.; Ruban, Sidonie

doi:10.1177/0307174x0603301003

Cited by 5 publications

(5 citation statements)

References 1 publication

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“…2 (prod-uct_2); D FT-IR spectra of a products from group no. 3 (product_3) the stretching vibrations of C=C bonds (Nekhoroshev et al 2005). In the range from 840 to 1165 cm −1 , several absorption peaks were seen that may correspond to various types of vibrations, including the bending, stretching, and rocking of -CH 2 and -CH 3 groups (Santhoskumar et al 2010).…”

Section: Characteristics Of the Studied Polymeric Materials-ft-ir Analysis And Emissions Studiesmentioning

confidence: 99%

Small Polymeric Toys Placed in Child-Dedicated Chocolate Food Products—Do They Contain Harmful Chemicals? Examination of Quality by Example of Selected VOCs and SVOCs

2021

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This study was focused on child-dedicated chocolate food products that contain a plastic package with a small toy inside (also known as chocolate eggs). Three types of these products that are commercially available on the Polish market, with different prices, chocolate composition, and main types of polymers used in the toy manufacturing process, were investigated. The polymers were identified using Fourier-transform infrared (FT-IR) analysis and emissions of selected toxic volatile organic compounds of toy and packaging samples were identified using stationary emission micro-chamber. Total volatile organic compounds emissions were also estimated. Moreover, the content of polybrominated diphenyl ethers (PBDEs) as bioaccumulative semi-volatile organic compounds was checked in all parts of the cheapest product. The highest PBDE concentrations, which ranged from 5.32 ± 0.79 to 1768 ± 289 ng/g, were recorded in chocolate samples. This demonstrates the need for consumer knowledge on the safety of such products available on the Polish market to be broadened. This is one of the many examples of studies showing that products sold on the European market do not always comply with the Conformité Européenne (CE) declaration of conformity. Furthermore, the presence of phased-out PBDEs in toys may provide evidence of wrong recycling practices. Forward-looking considerations showed that, based on assessments of the hazard quotient (HQ) and cancer risk of BDE-209 and assuming each child has contact with one toy and eats one of the studied chocolate products per day, there is no high risk associated with the exposure of children to PBDEs.

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Section: Characteristics Of the Studied Polymeric Materials-ft-ir Analysis And Emissions Studiesmentioning

confidence: 99%

Small Polymeric Toys Placed in Child-Dedicated Chocolate Food Products—Do They Contain Harmful Chemicals? Examination of Quality by Example of Selected VOCs and SVOCs

2021

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“…The absorption band detected in the range 1452-1458 cm −1 is characteristic for the asymmetric bending vibrations of the -CH 2 and -CH 3 groups (Ebadi-Dehaghani et al 2016). The peak observed at approximately 1375 cm -1 corresponds to the stretching vibrations of C=C bonds (Nekhoroshev et al 2005). In the range from 840 to 1165 cm -1 , several absorption peaks were seen that may correspond to various types of vibrations, including the bending, stretching, and rocking of -CH 2 and -CH 3 groups (Santhoskumar et al 2010).…”

Section: Characteristics Of the Studied Polymeric Materials -Ft-ir Analysis And Emissions Studiesmentioning

confidence: 99%

Small polymeric toys placed in child-dedicated chocolate food products - do they contain harmful chemicals? Examination of quality by example of selected VOCs and SVOCs

Śmiełowska

Marć

Zabiegała

2021

Preprint

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This study was focused on child-dedicated chocolate food products that contain a plastic package with a small toy inside (also known as chocolate eggs). Three types of these products that are commercially available on the Polish market, with different prices, chocolate composition, and main types of polymers used in the toy manufacturing process, were investigated. First, to fully characterise the studied polymer samples, the main types of material in the studied toys and their packaging were identified using Fourier-transform infrared (FT-IR) analysis. Next, the emissions of selected toxic volatile organic compounds (VOCs) of toy and packaging samples were identified using stationary emission micro-chamber. Total volatile organic compounds (TVOC) emissions were also estimated. Moreover, the content of polybrominated diphenyl ethers (PBDEs) as bioaccumulative semi-volatile organic compounds (SVOCs) was checked in all parts of the cheapest product. The highest PBDE concentrations, which ranged from 5.32±0.79 to 1768±289 ng/g, were recorded in chocolate samples. This demonstrates the need for consumer knowledge on the safety of such products available on the Polish market to be broadened. This is one of the many examples of studies showing that products sold on the European market do not always comply with the CE declaration of conformity. Furthermore, the presence of phased-out PBDEs in toys may provide evidence of wrong recycling practices. Forward-looking considerations showed that, based on assessments of the hazard quotient (HQ) and cancer risk of BDE-209 (CRBDE-209) and assuming each child has contact with one toy and eats one of the studied chocolate products per day, there is no high risk associated with the exposure of children to PBDEs.

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“…The main reason for the rapid development of polymer chemistry is the modern technology and national economy need for new inexpensive and promising materials [4][5][6][7][8]. Thus, oil ceresines (microcrystalline wax) and waxes [9][10], polymers [11][12][13] and their copolymers with olefins [14][15][16][17][18], as well as their combination [19] are used as additives modifying the dispersed structure of solid oil paraffins.…”

Section: Introductionmentioning

confidence: 99%

Temperature Capability of Polymer-Wax Composite Materials

Aleksandrova¹,

Hadisova²,

Aleksandrov³

et al. 2019

Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" Dedicated to the

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Temperatures of phase transformations of polymerparaffin compositions were investigated. Graphical dependences of temperature of the beginning of crystallization, temperature of the end of crystallization and phase hexagonal-rhombic H→R transformations in the solid state of oil food paraffin П-1 on the content of polymer modifiers (low-pressure polyethylene, polyethylene waxes, atactic polypropylene and poly ethylene-covinil acetate are constructed. It is shown that П-1 crystallizes first in H and then in R-phase.

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Structural Features of Atactic Polypropylene

Cited by 5 publications

References 1 publication

Small Polymeric Toys Placed in Child-Dedicated Chocolate Food Products—Do They Contain Harmful Chemicals? Examination of Quality by Example of Selected VOCs and SVOCs

Small Polymeric Toys Placed in Child-Dedicated Chocolate Food Products—Do They Contain Harmful Chemicals? Examination of Quality by Example of Selected VOCs and SVOCs

Small polymeric toys placed in child-dedicated chocolate food products - do they contain harmful chemicals? Examination of quality by example of selected VOCs and SVOCs

Temperature Capability of Polymer-Wax Composite Materials

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