Showing papers in "Polymer Degradation and Stability in 2018"

TL;DR: If polybutylene sebacate could be tested in a nanopolymeric form, it could very likely satisfy the Organization for Economic Co-operation and Development (OECD) criteria of “ready biodegradability” for chemicals.

TL;DR: A review of the strategies that have been used for compatibilization of blends of mixed thermoplastic waste can be found in this paper, where the authors introduce the concept of mechanical recycling.

TL;DR: In this article, the authors evaluated the polymer degradation potential of thermophilic consortia of Brevibacillus sps. and Aneurinibaclla sps for low and high density polyethylene.

TL;DR: In this article, a DOPO-based phenol derivative 4-[(benzothiazolyl 2-amino)(6-oxido-6H-dibenz[c,e][1,2]oxaphosphorin-6-yl) methyl] was successfully synthesized from 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10oxide (DOPO), p -hydroxybenzaldehyde (PHBA), and 2-aminobenzothiazole (ABZ

TL;DR: In this article, the effect of thermal treatment on the morphology and photocatalytic activity of freshly prepared TiO 2 nano-powders is communicated, and the photocatalyst degradation of methyl orange dye (MeO) is assessed by means of the photocATalytic degradation of MeO.

TL;DR: In this article, a phosphotungstic acid intercalated MgAl-LDH was prepared by reconstruction method, and it was then introduced into poly (lactic acid) (PLA) resin in association with intumescent flame retardant (IFR) by melt blending to prepare a flame-retardant biodegradable PLA composite.

TL;DR: In this article, a model of ultraviolet (UV) damage for polymers and polymer matrix composites (PMCs) was proposed, where flat and sinusoidal polymer surfaces were numerically simulated for their UV damage as a function of UV intensity, surface topography, and exposure time.

TL;DR: In this article, a layer-by-layer (LbL) technique is adopted for the construction of multilayers encompassing chitosan and graphene oxide (GO) platelets capable of improving the flame retardant properties open cell PU foams.

TL;DR: In this paper, a novel phosphorus-containing compound (DOPO-THPO) was synthesized via the Atherton-Todd reaction between 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10oxide and trihydroxymethylphosphine oxide (THPO), and employed as flame retardant for diglycidyl ether of bisphenol A/4-4 diaminodiphenylmethane epoxy resin (DGEBA/DDM).

TL;DR: In this article, a tri-block copolymer incorporating PLA blocks (LPB and HPB) with different chain lengths was synthesized as compatibilizers for PLA/PBAT blends.

TL;DR: In this paper, the effect of thermal, thermo-oxidative and thermomechanical degradation conditions on the melt rheological, chemical and thermal properties of PLA at temperatures around its normal processing temperature was studied.

TL;DR: 3D printed specimens exhibited good biocompatibility with HEK293 cells, indicating real promise as biological scaffolds for tissue engineering applications and the properties of 3D printed species before and during abiotic degradation are dependent on printing orientation.

TL;DR: In this article, the shape memory response of biodegradable nanocomposites based on PLA/PCL blend reinforced with different type of cellulose nanocrystals has been reported, and compared with those of the neat matrix.

TL;DR: In this article, the role of free radicals in the oxidation of polyethylene induced by high-energy irradiation (gamma or e-beam) has been discussed, and the authors evaluate the reactivity, stability and mobility of different macroradicals, their reactions after gamma irradiation of different polyethylenes (LDPE, LLDPE and UHMWPE) are considered.

TL;DR: In this paper, two phosphorus-containing flame retardants, (bis(4-hydroxyphenyl)methyl)diphenyl phosphine oxide (DPO-PHE) and 1-(bis(3-4-methyl)-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10oxide (DOPO)-PHE), were synthesized and characterized.

TL;DR: Bioaugmentation with Geobacillus increased the evolution of CO2 and accelerated the biodegradation phase of PLA and BNCs when tested in compost and inoculated vermiculite with compost mixed culture.

TL;DR: In this article, two commercially available flame retardants (FR's), a phosphazene (PZ) and a phosphorus-containing oligomeric compound with aromatic OH-groups, were incorporated into the epoxy novolac resin system DEN438/DICY/Fenuron, with and without the synergists melamine polyphosphate (MPP) and boehmite (AlO(OH).

TL;DR: In this article, a combination of testing strategies was used to assess the degree of degradation both under batch conditions, and in a simulation in which the plastics and food waste were fed daily to a digester for a period of 147 days.

TL;DR: In this paper, a novel mono-component intumescent flame retardant, named as hyperbranched triazine-piperazine pyrophosphate (HTPPP), was synthesized by using cyanuric chloride, 1-boc piperazine and phosphoric acid.

TL;DR: In this article, a comprehensive study on synthesis, processing, detailed material characterization and preliminary assessment of toxicity of relatively new flame retardant (FR) additives as a key for developing environmentally friendly fire safe polyesters was performed.

TL;DR: Recent data concerning the mechanism of action of specific and nonspecific enzymes in the hydrolysis of chitin and chitosan and regarding the application of a large number of different enzymes in chitooligosaccharide production are summarized, as well as information about the disruption of the polysaccharide crystalline structure by accessory proteins.

TL;DR: In this article, expandable graphite (EG) and aluminum hypophosphite (AP) are used to prepare flame-retardant polystyrene (PS) composites.

TL;DR: In this paper, the effect of storage temperature, SBS concentration, polymer type and base bitumen on the properties of polymer modified bitumen during storage at elevated temperatures in sealed aluminium tubes was investigated.

TL;DR: In this paper, a single step chemical modification process that overcomes the limitations of Tannic acid while allowing the utilization of its beneficial properties is reported, which is an abundantly available bio-based polyphenol that exhibits good intumescence and char forming characteristics upon being subjected to heat.

TL;DR: A novel oligomer (PFDCHQ) based on 9,10-dihydro-9-oxa-10-phosphaphenanthrene −10-oxide (DOPO) and ferrocene groups was synthesized successfully, aiming at improving the flame retardant efficiency of diglycidyl ether of bisphenol A epoxy resin (DGEBA) as mentioned in this paper.

TL;DR: In this paper, an enumeration and isolation of polylactic acid (PLA)-degrading bacteria from soils and wastewater sludge were performed on emulsified PLA agar.

TL;DR: A flame retardant named ODOPB-Borate constructed by DOPO and borate groups was synthesized via esterification reaction between boric acid and 10-(2,5-dihydroxyphenyl)-10-H-9-oxa-10phosphaphenanthrene-10oxide (ODOPB) as discussed by the authors.

TL;DR: In this paper, the thermal decomposition temperatures of cardanol derivatives were higher than that of the common petroleum-based plasticizer di-2-ethylhexyl phthalate (DOP) in the order ECA>CA>DOP.

TL;DR: In this paper, a new supercritical fluid foaming process, based on pre-isothermal cold crystallization, was proposed to prepare PLA foams with high expansion ratio, and the results showed that the new process provided a green, flexible, and low-cost way to prepare fully biodegradable PLA foam with high expand ratio.

TL;DR: In this paper, the effects of chlorine-based oxidants (mainly NaOCl) and H2O2 on polyethersulfone (PES) membranes are discussed.