New polyvinyl chloride (PVC) nanocomposite consisting of aromatic polyamide and chitosan modified ZnO nanoparticles with enhanced thermal stability, low heat release rate and improved mechanical properties

Liu

J of Applied Polymer Sci

et al. 2019

Herein, zinc oxide (ZnO) and molybdenum trioxide (MoO3) nanowires were prepared via the hydrothermal method. Then as‐prepared ZnO and MoO3 nanowires were fabricated to form ZnO/MoO3 compound nanostructure. ZnO/MoO3 compounds were incorporated into polypropylene (PP) with various loadings by melt blending. The D‐Optimal mixing design in Design‐Expert software was employed to study the effects of ZnO/MoO3 compound content on flame retardancy and mechanical properties of nanocomposites. Information on performance of thermal stability and flame retardancy of PP/ZnO/MoO3 nanocomposites was obtained through thermogravimetric analysis, cone calorimeter tests, and limiting oxygen index (LOI). The results reflected that the synthesized ZnO/MoO3 compound possessed high thermal stability and flame retardancy. The addition of 15 wt % ZnO nanowires and 13 wt % MoO3 nanowires increased LOI from 18.2 to 23.0%. Meanwhile, the tensile strength of the PP/ZnO/MoO3 nanocomposite decreased by 13.8% and the elongation at break of the PP nanocomposite increased by 20.4% compared with pure PP. Response surface analysis results also indicated that the loading of ZnO/MoO3 compound had an influence on the mechanical properties and flame retardancy of PP. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48312.

Section: Resultsmentioning

confidence: 96%

Improvement of thermal stability and flame retardancy of polypolypropylene composite modified by ZnO and MoO₃ nanowires

Liu

J of Applied Polymer Sci

et al. 2019

“…For further comparison, XRD pattern of ZnO nanoparticles is also represented in Fig. from previous work . After organo modification of ZnO nanoparticles by silane organic compound and PEI, no significant differences were observed in the appeared reflections.…”

Section: Characterization Of Pa/zno Nanocompositesmentioning

confidence: 92%

“…ZnO nanoparticles were prepared according to other work as follows: Briefly, two solution included; 5.6 g of Zn(NO 3 ) 2 and 4.2 g of (NH 4 ) 2 CO 3 were dissolved in 20 mL of twice distilled and deionized water, separately. The Zn(NO 3 ) 2 solution was added to the (NH 4 ) 2 CO 3 solution with the vigorously stirring.…”

Section: Methodsmentioning

confidence: 99%

“…For further comparison, the FE‐SEM micrograph of ZnO nanoparticles is also illustrated in Fig. from previous work . From FE‐SEM micrograph of PSMZ (Fig.…”

Section: Characterization Of Pa/zno Nanocompositesmentioning

confidence: 96%

“…For further comparison, the FTIR spectrum of the neat ZnO nanoparticles was added to Fig. , from previous work . In the FTIR spectrum of ZnO nanoparticles (Fig.…”

Section: Characterization Of Pa/zno Nanocompositesmentioning

confidence: 99%

See 2 more Smart Citations

New nanocomposites based on polyamide containing imine groups reinforced with functionalized polyethyleneimine‐modified ZnO nanoparticles; fabrication, characterization and lead ion adsorption studies

2018

Self Cite

New polyamide (PA)/ZnO nanocomposites were prepared using polyethyleneimine (PEI) surface‐modified ZnO nanoparticles (PSMZ) by solution mixing method. PSMZ was prepared via imine linkages between PEI and silane‐amine functionalized ZnO nanoparticles. Multifunctional PA containing imine groups was synthesized by direct polycondensation reaction and used as a polymer matrix. X‐ray diffraction (XRD) and field‐emission scanning electron microscopy results showed that the ZnO nanoparticles were uniformly distributed in the PA matrix. The UV–Vis spectra of the nanocomposites exhibited reduction in absorption intensities due to high interactions between functional groups of PSMZ and PA. The thermogravimetric analysis results exhibited that the temperature at 10 mass% loss (T10) increased from 314 to 352°C for PA nanocomposite containing 6 mass% of PSMZ, as well as enhancement of char residue compared with the neat PA. Also, the synthesized PA and corresponding nanocomposites were used as effective adsorbent for the lead ions removal from aqueous solution, which the results showed up to 100% removal efficiency. POLYM. COMPOS., 40:2602–2616, 2019. © 2018 Society of Plastics Engineers

J of Applied Polymer Sci

Improvement of the processability and thermal stability of poly(vinyl chloride) with 5,6‐diamino‐1,3‐dimethyluracil

Chen

et al. 2020

Uracil derivatives are potential nontoxic thermal stabilizers of poly(vinyl chloride) (PVC) and have a better stabilization effect. 5,6‐diamino‐1,3‐dimethyluracil (DDU) was investigated as a thermal stabilizer for PVC. The stabilization effect of DDU was measured by thermogravimetric analysis, thermal aging test, and recording the time of the color change of the Congo red paper (Congo red test). Meanwhile, the processability of PVC stabilized by DDU was investigated through dynamic performance test. The results showed a better stabilizing effect compared with calcium stearate (CaSt2) and zinc stearate (ZnSt2). To explain the stabilization of DDU, the probable mechanism was suggested that DDU absorbed and chemically bonded with hydrogen chloride. Therefore, DDU could be used as a thermal stabilizer of PVC.