Showing papers in "Polymer Degradation and Stability in 2021"

TL;DR: In this article, a flame retardant POBDBI was generated by the reaction of p-dibenzaldehyde, 5-amino-2-benzimidazolinone and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10oxide (DOPO), and employed to epoxy resin.

TL;DR: In this article, a Lysinibacillus sp., isolated and identified as a novel strain, was investigated to decompose polyethylene and polypropylene, and the results suggest that microorganisms can be used to degrade polyethylenes without a physicochemical process, which can be a starting point for developing methods for remediating soil contaminated with plastics.

TL;DR: In this paper, a bi-functional flame retardant for rigid polyurethane foam (RPUF), denoted as PDEP, was designed and synthesized, which contained two phosphorus-based moieties: phosphophenanthrene (DOPO) and a phosphate (DEP), which may exert different functions at different temperatures.

TL;DR: In this article, the feasibility and viability of mechanical recycling of post-consumer bio-based plastics, and the recirculation potential of the recovered material, are proposed based on the evaluation and synthesis of research results selected through a critical literature review.

TL;DR: In this article, a comparison of the infrared spectra of the film with and without these additives before and after the weathering tests showed that the addition of chain extender and light stabilizer improved the polymer weathering resistance significantly.

TL;DR: In this article, the thermal properties of tannic acid and in detail flame retardant performances of TANNIC acid (hydrolyzed and condensed), chemically modified TANNic acid-treated textile, polymeric substrates.

TL;DR: A bio-based reactive flame retardant (VFD) derived from vanillin, furfurylamine and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10oxide (DOPO) was successfully synthesized via one-pot method, and served as co-curing agent of DDM to prepare the flame-retardant epoxy resin this article.

TL;DR: In this article, a phosphorus/nitrogen-containing compound (DOPO-BAPh) was synthesized via graft reaction between 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10oxide and bisphenol A bis(phthalonitrile) containing benzoxazine.

TL;DR: In this article, a bio-based flame retardant named PF is synthesized by the reaction between phytic acid (PA) and furfurylamine (FA) in water.

TL;DR: In this paper, the photostability of transparent wood composite (TWC) was evaluated by exposing TWC sheets to a UVA340 fluorescent lamp in an accelerated weathering tester.

TL;DR: In this article, a phosphorous soybean-oil-based polyol was derived via epoxidation and ring opening reaction as an alternative to petrochemical based polyol for the synthesis of flexible polyurethane foams (FPUFs).

TL;DR: In this article, a combination of Piperazine pyrophosphate (PAPP) combined with melamine polyphosphate(MPP) was adopted to prepare the flame retarded glass fiber reinforced polypropylene (FRGFPP) composites.

TL;DR: In this article, a 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10oxide (DOPO)-derived compound (tetra-dOPO) with different oxidation states of phosphorus and rich aromatic structures was successfully synthesized via addition and Atherton-Todd reactions.

TL;DR: In this paper, a bio-based flame retardant (ATMP-NA-Fe) was successfully synthesized by a simple aqueous ionic reaction by using amino trimethylene phosphonic acid, nicotinamide (NA) and FeCl3•6H2O as raw materials.

TL;DR: In this paper, a triazine-based flame retardant, namely (4,6-dimethoxy-1,3,5- triazine)-2-methyl-propane-1-3-diol (TMPD), was synthesized and used as a chain extender to prepare flame-retardant waterborne polyurethane (FRWPU).

TL;DR: In this paper, a comprehensive review aims to outline the recent research advances in the field of flame retardancy of polybutylene succinate (PBS), focusing on the preparation, properties, and mechanisms.

TL;DR: In this article, a small molecular substance with similar structure to natural rubber was used to simulate the ozone aging process and analyze the molecular structure changes of natural rubber after comprehensive characterization, the obtained results showed that the natural rubber molecular network, during the aging process, was destroyed and three newly-discovered free radicals were generated (•H, •O2−and •C=C).

TL;DR: In this article, a review of the problems in rubber waste management is presented, which aims to provide detailed insight into alternatives to manage rubber waste through thermal, mechanical, physical, chemical, and biological methods.

TL;DR: In this article, an overview of the complexity of carbonyl quantification is presented by screening of reference compounds in solution with transmission and polymer films with ATR IR spectroscopy, and systematic data analyses.

TL;DR: In this article, the influence of the presence of HNTs and its derivatives on the fire retardancy performances of polymer-based composites is examined according to the nature of the polymer from thermoplastics to thermosets.

TL;DR: In this article, a bio-based flame-retardant polyol (PESO) was developed for rigid polyurethane foams (RPUFs) without deteriorating other physical properties.

TL;DR: In this article, the potential of the pyrolysis technique for the recovery of plastic waste was investigated and it was shown that aromatic compounds are mainly formed and could reach 55wt.-% of the oil fraction for pure polypropylene (PP), polyethylene (PE), polystyrene (PS), and polyethylenes terephthalate (PET) at 550°C.

TL;DR: In this paper, the authors achieved high expansion ratio, continuous honeycomb polygonal cells, a very low thermal conductivity of 26.4 mW/m•K, strong tensile and compressive strength, as well as recyclable property.

TL;DR: In this article, magnolol-based cyclic phosphonates with double bond and epoxy group were synthesized, and used in epoxy resin (EP) for better flame retardancy than that of EP/EDPDO.

TL;DR: In this paper, a hyperbranched polyamide charring agent (HPCA) was synthesized by amidation of 1,2,3,4-butanetetracarboxylic acid and melamine, and its chemical structure was characterized.

TL;DR: In this article, thermomechanically devulcanized ground tire rubber (GTR) was used in a co-rotating twin-screw extruder at different barrel temperatures and screw speeds.

TL;DR: In this paper, natural weathering behavior of sixteen different wood species was investigated under the same conditions in order to clarify the resistance against outdoor degrading agents regarding wood color, gloss, surface roughness and surface chemistry.

TL;DR: In this article, the effect of voltage stabilizers under high temperatures is investigated by using density functional theory (DFT) to analyze the mechanism of AOHBP improving the electrical properties by scavenging high-energy electrons.

TL;DR: In this paper, an intrinsically flame retardant bio-based epoxy monomer (HECarCP) was synthesized from cardanol and cyclophosphazene, which was cured by 4,4'-diaminodiphenyl methane (DDM) to obtain a thermosetting material.

TL;DR: In this paper, two types of pultruded carbon/glass fiber reinforced epoxy hybrid composite rods, one with uniformly dispersed carbon and glass fibers, and the other with glass fiber shell and carbon fiber core, were investigated on the water uptake and interface shear strength.