Showing papers in "Polymer Degradation and Stability in 2020"

TL;DR: In this article, the properties and applications of various hydrogels such as acrylic acid, acrylamide, and preparation method of these materials using N,N′-methylenebisacrylamides (MBAA-crosslinker), ammonium persulfate (APS-initiator), tetramethylethylenediamine (TEMEDA-catalyst), and Fe+3 (ionic cross linker) are explored and discussed.

TL;DR: In this paper, an organic/inorganic phosphorus-nitrogen-silicon flame retardant (DPHK) was synthesized by Kabachnik-Fields reaction and the sol-gel method, then it was used as a reactive flame retardant to prepare flame-retardant and smoke-suppressant epoxy resins (EP).

TL;DR: In this article, a nitrogen/sulfur-containing DOPO-based oligomer (SFG) for highly efficient flame-retardant epoxy resin was successfully synthesized via a facile one-pot method with DopO, sulfaguanidine and p-phthalaldehyde.

TL;DR: In this paper, a detailed review of the reactions that take place and their effects on the properties of polymers is presented. But the results of these early studies were only recently verified by methodologies developed in recent years.

TL;DR: In this paper, a liquid phosphorus-containing flame retardant named bis((dimethoxyphosphoryl)methyl) phenyl phosphate (BDMPP) was synthesized via dimethyl (hydroxymethyl)phosphonate and phenyl dichlorophosphate and applied into flexible polyurethane foams (FPUFs).

TL;DR: The thermal stability of BC and its relevance in biomedical application have been explained, and four main proposed mechanisms were identified, which includes; hydrolysis, enzymatic, oxidation and physical mechanism, which occurs in a tandem.

TL;DR: Comparative R&D is needed for extended, reuse and recyclability options, as well as large scale approaches and methods that could quickly be applied on the local level by the public who are not experts and may only have limited resources.

TL;DR: In this paper, the effect of reprocessing on the rheological, thermal, and mechanical properties of polypropylene (PP) and low-density polyethylene (LDPE) blends was investigated.

TL;DR: In this article, the optimum concentrations of constituents of edible film were determined with response surface methodology as 39.2% for glycerol and 4.5% for essential oil.

TL;DR: In this article, flexible electrospun mat based on poly(lactic acid) (PLA) blended with 25% of poly(hydroxibutyrate) (PHB) and further plasticized with three different concentration of oligomeric lactic acid (OLA) were developed.

TL;DR: In this article, a post-modification method was developed to prepare inherent FR PU foam, which use β-CD as chain extender and introduce FR additive through a facile esterification between phosphoric acid and β -CD moiety in PU foams.

TL;DR: In this article, lignosulfonate (LS) and chitosan (CS) were selected to be flame-retardants for the vertical flame test (VFT).

TL;DR: In this paper, a novel phosphorus and nitrogen containing flame retardant named 1,4-bis(Diethyl methylenephosphonate) piperazine (BDEMPP) was synthesized.

TL;DR: In this article, karanja oil has been epoxidized and further used as biobased plasticizer to improve some properties of poly (lactic acid) (PLA).

TL;DR: An overview on thermal responses and ongoing filtration performance of multiple face mask types is provided and Repeated thermal disinfection could be an important option and likely easier implemented in some situations, at least on the small scale, than UV illumination, irradiation or hydrogen peroxide vapor exposure.

TL;DR: In this paper, the authors discuss the accelerated weathering of poly(lactic acid) (PLA) and how fillers, reinforcements, and additives affect photo-degradation.

TL;DR: In this paper, an accelerated soil biodegradation test is proposed, where by increasing the incubation temperature from 25°C to 37°C, up to about 4-fold increase in the biodegradability rate is achieved.

TL;DR: In this article, three different compositions from PCL-GT-PVA with blend ratios of 2:1:0.5, 2:2:1.0.8, and 2: 1.8 were electrospun and their morphology was compared with PCLGT-GT (2:2.2) structure.

TL;DR: In this article, a flexible siloxane chain containing phosphaphenanthrene structure (KHDOPO) was chemically grafted onto epoxy resin macromolecules, which exhibited satisfactory flame retardancy and thermal stability.

TL;DR: In this paper, the authors present the latest catalytic chemical recycling methods that were developed as solutions to the end-life management of biodegradable polyesters, with a focus on polylactic acid (PLA) and polyhydroxybutyrate (PHB).

TL;DR: In this paper, a suite of analytical experiments and mechanical testing on pristine and oxidized low-density polyethylene films was employed to investigate the transient strengthening behavior as well as the propensity for cavitation to fracture.

TL;DR: In this article, the effects of UV exposure on the physical, mechanical, and thermo-mechanical properties, including the microstructure particulate-filled epoxy-based polymer coating, were investigated.

TL;DR: In this article, a phosphaphenanthrene flame retardant, DCAD, was synthesized by 9,10-dihydro-9-oxa-10-phosphaphenthrene-10oxide (DOPO), p-phenylenediamine and bio-based material cinnamaldehyde.

TL;DR: In this article, two reactive monomers of 1,6-hexanediol diacrylate and trimethylolpropane triacylate were selected to adjust the 3D printing conditions and improve thermal properties of the photocured polymer.

TL;DR: In this article, a novel organic-inorganic hybrid nanoparticles named phosphoryl polyethyleneimine amide-layered double hydroxide (PPEIA-LDH) were prepared via a simple reaction process.

TL;DR: In this paper, a review compiles the results on polyhydroxyalkanoates (PHAs) polymers and PHA blends biodegradation, with focus on laboratory tests.

TL;DR: In this article, 1.5% water-soluble phenolic resin (WSPR) and 0.1% zeolitic imidazolate framework-67 (ZIF-67) were assembled on the surface of flexible polyurethane foam (FPUF) by electrostatic action.

TL;DR: In this paper, a series of 9,10dihydro-9,oxa-10-phosphaphenanthrene-10oxide (DOPO) derivative salts containing phosphorus and nitrogen were synthesized, and their effects on mechanical properties, thermal stability and flame retardancy of flexible polyurethane foam (FPUF) were investigated.