Optical characterization of weakly absorbing PP, PE, and PP/PE films

Boydaǧ, F. Ş.; Mamedov, Sh. V.; Alekperov, V. A.; Özcanli, Y. Lenger

doi:10.1134/1.1604429

Cited by 9 publications

(9 citation statements)

References 5 publications

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“…In all the samples a sharp absorption edge generally appears in the range of 250-400 nm with a double peak except for LDPE samples [8]. The intensities of these peaks are higher in the case of 20% fiber and 0.5% diamond additives.…”

mentioning

confidence: 93%

“…There has been increasing interest in preparing polymers with high optical stability and good mechanical properties. In our previous studies we examined only some of the blends, which were not enough to get data on the structural and optical stability of the samples [7][8][9][10][11][12][13][14]. It is possible to answer many questions by comparing the results obtained from both clarifying the mechanical-electrical properties of and applying spectroscopic methods to the same samples.…”

mentioning

confidence: 98%

“…The objective of this article is to examine optical and mechanical-electrical degradation properties of LDPE/diamond [7]; LDPE/PP fiber; PP/PP fiber [5,9] blends and compare them with those of LDPE/PP and PP/LDPE which are widely used in industry to provide a deeper understanding of structural variations for organic and inorganic additives and to find their optimum amounts which change the blend optical properties [8,12].…”

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confidence: 99%

“…The absorption process plays an important role in the optical properties of polymer: short UV wavelengths activate unstable bonds while longer infrared (IR) wavelengths are absorbed selectively by the functional groups in the polymer molecule [7,8] providing useful means for the analysis of groups in the structure. Calculation of the absorption from the measurements gives an opportunity to obtain information about the nature of chemical bonds.…”

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confidence: 99%

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Comparison of optical properties and mechanical/electrical degradation of some low density polyethylene-and polypropylene-based polymer blends

2007

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Boydağ, Fatma Şenel (Dogus Author)In this study, the optical properties as well as mechanical and electrical degradation of low-density polyethylene (LDPE)/polypropylene fiber (PP fiber) (10–50% PP fiber), polypropylene (PP)/PP fiber (10–50% PP fiber), and LDPE/diamond (0.1–3% diamond) blends, which are prepared by hot pressing method, with changing thicknesses ranging from 30 to 225 µm, are compared. The spectra, in the wavelength range 200–2500 nm, are examined. Based on optical absorption spectra obtained, Tauc graphs are plotted. Determined values of the direct optical energy gap (E d opt ), the indirect optical energy gap (E i opt ), the width of the band (ΔE), and ultraviolet transmittance (TUV) are listed. The direct E d opt and indirect E i opt values for organic blends are in the range of 3.10–3.17 eV and 1.52–2.99 eV; for inorganic blends they are 1.80–4.13 eV and 1.55–4.7 eV respectively. The electrical strength (ε) and the mechanical tension (σ) have been investigated, and graphs (the dependence of the electrical life time log τε on ε) are given. The experimental results are analyzed from the viewpoint of the validity of the thermofluctuation theory. LDPE and LDPE/0.5% diamond composite parameters consecutively changed: σ from 68 to 82 MPa, ε from 60·106 to 85·106 V/m, mechanical lifetime τσ from 10 to 1.5·105 sec, electrical lifetime τε from 2· 103 to 2·105 sec, and structure-sensitive parameters γ and χ — from 1.48 to 1.18 (J)MPa/mole and from 0.97 to 0.70 (J)Vm−1/mole respectively. The values of mechanical and electrical durability were observed to increase by 20 and 41%, respectively, for LDPE/0.5% diamond composite

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confidence: 93%

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confidence: 98%

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confidence: 99%

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Comparison of optical properties and mechanical/electrical degradation of some low density polyethylene-and polypropylene-based polymer blends

2007

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“…This suggests that POSS acts as a physical crosslink, reducing the amount of effective energy within the polymer and shifting the spectra. 49 …”

Section: Uv-visible Spectroscopymentioning

confidence: 97%

Novel elastomer‐dumbbell functionalized POSS composites: Thermomechanical and Morphological Properties

Spoljaric

Genovese

Shanks

2011

J of Applied Polymer Sci

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Nanocomposites consisting of poly(styreneb-butadiene-b-styrene) (SBS) and polyhedral oligomeric silsesquioxanes (POSS) were prepared using a solvent dispersion method. Dumbbell-shaped POSS fillers were prepared using diacyl chlorides to bridge the POSS molecules. Infrared spectroscopy confirmed functionalization. Scanning electron microscopy revealed an increase in filler aggregation with concentration, with preferential phase selectivity. Polydispersity increased with filler concentration while d spacing was influenced by phase selectivity and domain-filler compatibility. Functionalized POSS improved thermal stability by imparting restrictions of SBS chain motions. Tensile stress-strain analysis revealed an increase in modulus, yield strength, and strain hardening with filler concentration, while creep deformation decreased and permanent strain increased with POSS content. Storage modulus, loss modulus, and glass transition temperature increased with filler content due to effective SBS-POSS interaction. Nanocomposite properties were influenced by filler concentration, the phase of the filler was dispersed throughout and the length of the alkyl ''barbell'' on the dumbbell-shaped POSS.

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Thermal, Optical, and Static/Dynamic Mechanical Properties of Linear‐core Crosslinked Star Polymer Blends

Spoljaric

Goh

Blencowe

et al. 2011

Macro Chemistry & Physics

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Core crosslinked star (CCS) polymers ae synthesized and blended with linear polymers. Constrained mobility is revealed by an increase in modulus and strength with CCS polymer concentration, while creep deformation decreases and permanent strain increases. Storage modulus, loss modulus, and glass transition temperature increase with CCS polymer concentration due to miscibility and linear‐CCS polymer “arm” interactions. Master curves shift to lower frequencies with blends that experience segmental relaxation across a broader time scale due to a range of molecular environments from linear to maximum constraints in the vicinity of the crosslinked cores. Fragility and apparent activation energy increase with CCS polymer content, while fractional free volume and volume expansion decrease.

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Optical characterization of weakly absorbing PP, PE, and PP/PE films

Cited by 9 publications

References 5 publications

Comparison of optical properties and mechanical/electrical degradation of some low density polyethylene-and polypropylene-based polymer blends

Comparison of optical properties and mechanical/electrical degradation of some low density polyethylene-and polypropylene-based polymer blends

Novel elastomer‐dumbbell functionalized POSS composites: Thermomechanical and Morphological Properties

Thermal, Optical, and Static/Dynamic Mechanical Properties of Linear‐core Crosslinked Star Polymer Blends

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