Showing papers in "Polymer Degradation and Stability in 2019"

TL;DR: In this article, a review aims to introduce poly (lactic acid) (PLA), a bioplastic, and recent research within the field, focusing on research surrounding plastic waste management.

TL;DR: In this paper, a novel bio-based PHYtic acid salt PHYPI was prepared through a salt formation reaction between phytic acid and piperazine, which showed high efficiency in combustion tests.

TL;DR: In this paper, a novel P/N-containing oligomer poly(piperazine phenylphosphamide) (BPOPA) was synthesized via the polymerization reaction of phenyl-phosphonic dichloride with piperazine.

TL;DR: In this paper, a flame retardant named ABD owning relatively short bridged bonds and a hydroxyl group was synthesized via addition reaction between acrolein and 9,10-dihydro-9-oxa-10phosphaphenanthrene 10-oxide (DOPO).

TL;DR: In this paper, a novel phosphorus-nitrogen flame retardant named as melamine phenyl phosphate (MAPPO) was synthesized successfully via the neutralization reaction between phenylphosphonic acid (PPOA) and melamine (MA).

TL;DR: In this article, a flame retardant poly (piperazine phosphaphenanthrene) (DOPMPA) was successfully synthesized via two step reactions using DOPO and piperazine as reactants and characterized by infrared spectrometry (FT-IR), nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC).

TL;DR: In this article, a novel DOPO-containing imidazole curing agent (DIB) was successfully synthesized, and served as a co-curing agent of 4,4‘-diaminediphenyl sulfone (DDS) to prepare a reactive flame-retarded epoxy thermoset (EP/DDS/DIB).

TL;DR: In this article, a formaldehyde and halogen-free coating, containing phosphorus, nitrogen and silicon, was synthesized with a promising approach to enhance flame retardancy of cotton fabric.

TL;DR: In this article, a model polyolefin system of high-density polyethylene (HDPE) was exposed under controlled laboratory conditions to a range of temperatures (30°C, 40°C and 50°C) and ultraviolet (UV) light intensities (153

TL;DR: In this paper, the authors investigated the biodegradability of aliphatic polyesters, such as PCL, PBSA and P3HB, in seawater and field test were carried out.

TL;DR: A bio-based organic-inorganic hyperbranched hybrid (PAMA), possessing unique nano-layered structure, was designed and prepared by the neutralization reaction between phytic acid and melamine, then used as a multi-function intumescent flame retardant for epoxy resin this paper.

TL;DR: In this article, a thermal performance curve (TPC) was obtained by plotting the specific mineralization rates against the respective temperatures, and the TPC was perfectly described by an exponential model that was in agreement with the Arrhenius equation.

TL;DR: In this article, a high efficiency flame retardant composed of phosphaphenanthrene, benzothiazole and imidazole groups (PBI) was synthesized and served as a co-curing agent to reduce the fire hazard of epoxy resin (EP).

TL;DR: A flame-retardant curing agent (DTA) for epoxy resin (EP) was successfully synthesized via one-pot reaction between 2-aminobenzimidazole, terephthalaldehyde, and 9,10-dihydro-9-oxa-10phosphaphenanthrene-10oxide (DOPO).

TL;DR: In this article, the authors studied changes in the mechanical behavior of polyethylene terephthalate (PET) induced by hydrolysis, especially for high degradation levels, and found that the stress at break decreases linearly with the molar mass, and can be described by a simple mathematical expression.

TL;DR: In this paper, a new fertilizer in which S8 structure is more accessible to oxidizing microorganisms by chemical modification via inverse vulcanization technique, a solvent-free copolymerization method, with soybean oil as comonomer.

TL;DR: In this paper, the authors developed strategies to improve the crystallinity and mechanical properties of PLA, without compromising its hydrolytic degradation behavior, using reactive extrusion and addition of a novel type of cross-linked PLA-based nucleating agent (biofiller, BF).

TL;DR: In this paper, the electrostatic action was used to prepare a novel ammonium polyphosphate@layered double hydroxide (APP@LDH) in which the LDH nanoparticles accumulated at the surface of APP to achieve the highly-efficient synergistic action of LDH in thermoplastic polyurethane/APP (TPU/APP).

TL;DR: In this paper, an ammonium polyphosphate modified with β-Cyclodextrin (β-CD) as intumescent flame retardants was prepared and then incorporated in rigid polyurethane foam (RPUF) to improve thermal stability and flame retardancy.

TL;DR: In this article, the biodegradation kinetics in soil of a biodegradable multi-constituent plastic material have been determined with a standard test method based on the measurement of the evolved CO2.

TL;DR: In this article, a novel phosphorus−silicon containing epoxy resin (EF−P/Si) was prepared by introducing a phosphoric triamide (PTA) and epoxy−functionalized polysiloxane (EFP) into the Bisphenol F epoxy resins/4,4′−diaminodiphenyl methane (DDM) system to improve its flame retardancy and mechanical properties.

TL;DR: In this article, the size, shape distributions of polyethylene (LDPE) and polypropylene (PP) fragments were linked to the crystalline morphology of the weathered polymers.

TL;DR: In this article, various kinds of aging treatments were given to silicone rubber (SiR), an important inorganic polymer for electrical insulation, and the SiR sheets were examined by terahertz (THz) absorption spectroscopy, IR, nuclear magnetic resonance, and indenter modulus.

TL;DR: In this article, a mono-component intumescent flame retardant dimelamine pyrophosphate (DMPY) was successfully synthesized and incorporated into TPU matrix.

TL;DR: The results demonstrated that the chitosan/collagen composite scaffolds could promote the attachment, migration and proliferation of Schwann cells and may have good potential promising application as scaffolds materials for peripheral nerve regeneration.

TL;DR: In this article, a biobased, safe and green epoxy (BEF-EP) and its hardener 3-methoxy-4-hydroxy-phenylbenzimidazole (VBZMI) were prepared from 1-allyl-3methoxide-4hydroxybenzene (eugenol) and 2-methylphenol (vanillin), respectively.

TL;DR: In this paper, a novel phosphorus-nitrogen flame retardant, nano zirconium amino-tris-(methylenephosphonate) (Zr-AMP), successfully synthesized by allowing amino trimethylene phosphonic acid (AMP) to react with ZrOCl·8H2O, was incorporated into rigid polyurethane (RPU) foam with expandable graphite (EG) to prepare flame retarded composites.

TL;DR: An intumescent nanocoating composed of chitosan (CH) and ammonium polyphosphate (APP), with and without low-molecular weight nitrogen and nitrogen/sulphur based derivatives, was deposited on polyester fabric using the layer-by-layer technique.

TL;DR: In this article, the authors applied flame retardant (MCMPP) and water resistant thermoplastic polyurethane (TPU) composite, which achieved V-0 rating in UL-94 test after immersing in water for 72'h' at 70'h'.

TL;DR: In this article, the authors compared the biodegradation mechanisms of two promising biodegradable plastics, PHBV Poly(3hydroxybutyrate-co-3-hydroxyvalerate) and PBSA Poly(butylene succinate-Co-adipate) with the objective to provide a better understanding of the mechanisms involved and identify the most relevant indicators to follow biodegrading.