gamma-irradiated poly(tetrafluoroethylene) particle-filled low-density polyethylene. II. UV stability of LDPE in the presence of 2 degrees-PTFE powder and silane coupling agents

1999-10-24
Akinay, AE
Tincer, T
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
84
views
0
downloads
Ultraviolet (UV) stability of gamma-irradiated poly(tetrafluoroethylene), 2 degrees-PTFE, powder-filled low-density polyethylene (LDPE) was studied in this work. The mechanical and thermal properties of 2 degrees-PTFE powder-filled LDPE were discussed in our previous work (Akinay and Tincer, 1999). It already has been shown that silane coupling agents (SCAs) result in improvements in mechanical properties. The UV stability of these samples was followed by a comparision between strain at break measured after UV irradiation and the initial strain at break, in terms of their ratio defined as residual elongation. The development of carbonyl index was also determined by infrared measurements. To get further UV stability, a hindered amine light stabilizer (HALS) was also used. Whereas addition of 2 degrees-PTFE slightly enhanced the UV stability of LDPE, mercapto type silane (A-189) treatment appeared to increase the UV stability compared with the other types of silane treatments. HALS highly improved the UV stability of untreated and silane-treated 2 degrees-PTFE-filled LDPE at given UV irradiation time. Although we observed some fluctuations in the experimental data of HALS and SCA treated 2 degrees-PTFE-filled LDPE, the coaddition of HALS and SCAs showed synergetics effects in the UV stability compared with the separate additions. (C) 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 877-888, 1999.
Materials Chemistry, General Chemistry, Surfaces, Coatings and Films, Polymers and Plastics
https://hdl.handle.net/11511/65974
Department of Chemistry, Article

Suggestions

Batteries and a Pinch of Salt: A Simple Toolkit for the Production of Poly(methylsilyne)
Eroglu, Darnla; Nur, Yusuf; Soenmez, Umut; Bayram, Göknur; Pitcher, Michael W.; Toppare, Levent Kamil (Wiley, 2009-06-15)
A simple synthesis of poly(methylsilyne) has been developed. The straightforward polymerization reaction can be accomplished using simply a series of batteries and a very simple electrolyte. Poly(methylsilyne) has previously been shown to be a high-purity, high-yield precursor to stoichometric silicon carbide. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 3519-3521, 2009
gamma-irradiated poly(tetrafluoroethylene) particle-filled low-density polyethylene. I. Effect of silane coupling agents on mechanical, thermal, and morphological properties
Akinay, AE; Tincer, T (Wiley, 1999-10-24)
Poly(tetrafluoroethylene) (PTFE) scraps were recovered as a filler material for low-density polyethylene (LDPE) after they were degraded by Co-60 gamma-rays under atmospheric conditions to make small-size powder. The powder PTFE, which was called secondary PTFE (2 degrees-PTFE), was melt mixed with LDPE and then extruded to obtain 200 mu m films. The mechanical and thermal properties and also the morphology of the fractured surface of these 2 degrees-PTFE-filled LDPE were studied. It was found that the addi...
Efficient light emitting diodes from ternary blends of PPV-based copolymers
Çırpan, Ali; KARASZ, Frank E. (Wiley, 2006-11-05)
Light emitting diodes (LEDs) were prepared using ternary blends of block copolymers emitting in the blue (I and II) and green (III) regime. These blends were studied in terms of their absorbance, photoluminescence (PL), and electroluminescence (EL) spectra. The PL spectra in dilute solution and in the solid state were compared. Förster energy transfer from I and II to III was studied in the solid state. The EL device made using a ternary blend with the ratio (1 : 1 : 1) showed the highest EL quantum efficie...
Electropolymerization of a New 4-(2,5-Di-2-thiophen-2-yl-pyrrol-1-yl)-Tetra Substituted Nickel Phthalocyanine Derivative
Yavuz, Arzu; Carbas, Buket Bezgin; Aras, Leyla; Önal, Ahmet Muhtar (Wiley, 2011-10-15)
A new tetrakis 4-(2,5-di-2-thiophen-2-yl-pyrrol-1-yl) substituted nickel phthalocyanine (NiPc-SNS) was synthesized and characterized by elemental analysis, Fourier Transform Infrared (FT-IR), and UV-vis spectroscopies. The electrochemical polymerization of this newly synthesized NiPc-SNS was performed in dichloromethane (DCM)/tetrabutylammonium perchlorate (TBAP) solvent/electrolyte couple. An insoluble film was deposited on the electrode surface, both during repetitive cycling and constant potential electr...
Poly(methyl methacrylate) hybrid syntactic foams with hollow glass microspheres and polyhedral oligomeric silsesquioxanes
Ozkutlu, Merve; Dilek Hacıhabiboğlu, Çerağ; Bayram, Göknur (Wiley, 2019-08-10)
The study aims to produce poly(methyl methacrylate) (PMMA)-based lower density syntactic foams with hollow glass microspheres (HGMs) and to improve their mechanical properties by the addition of polyhedral oligomeric silsesquioxanes (POSSs) while maintaining the thermal properties of the neat polymer. First to understand the effect of POSS addition, PMMA-POSS composites with octaisobutyl and octaphenyl POSS were produced through extrusion. Higher relative flexural and impact strengths were obtained with POS...
Citation Formats
A. Akinay and T. Tincer, “gamma-irradiated poly(tetrafluoroethylene) particle-filled low-density polyethylene. II. UV stability of LDPE in the presence of 2 degrees-PTFE powder and silane coupling agents,” JOURNAL OF APPLIED POLYMER SCIENCE, pp. 877–888, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65974.
METU IIS - Integrated Information Service open@metu.edu.tr