Browsing by Author "Oral, A"
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Item Synthesis of Poly(cyclohexene oxide)-Montmorillonite Nanocomposite via In Situ Photoinitiated Cationic Polymerization with Bifunctional ClayBayram, I; Oral, A; Sirin, KPoly(cyclohexene oxide) (PCHO)/clay nanocomposites were prepared by means of in situ photoinitiated cationic polymerization with initiator moieties immobilized within the silicate galleries of the clay particles. Diphenyliodonium molecules were intercalated via cation exchange process between Cloisite Ca and diphenyliodonium. The polymerization of CHO through the interlayer galleries of the clay can provide a homogenous distribution of the clay layers in the polymer matrix in nanosize and results in the formation of PCHO/clay nanocomposites. The rates of clay loadings were changed to 1%, 3%, and 5% so as to investigate the effect of clay and initiator amount on polymer. X-ray diffraction (XRD) spectroscopy, thermogravimetric analysis (TGA), and transmission electron microscopy (TEM) methods were used for the characterization of modified clay and nanocomposite materials. Thermal stability of PCHO/MMT nanocomposites was also studied by both differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA).Item SYNTHESIS AND CHARACTERIZATION OF NOVEL 1,2,3-TRIAZOLE-BRIDGED OXIME POLYURETHANES OBTAINED FROM AN ISOMANNIDE DERIVATIVEBayrak, F; Oral, A; Ay, KPolyurethanes (PUs) are synthesized by the reaction of diisocyanates and diols and are widely used in furniture foams, thermal insulation, coatings, and adhesives. In this work, a 1,2,3-triazole-bridged dioxime (compound 6) as a diol source was synthesized from isomannide via tosylation, azidation, and cyclization-addition and used in the syntheses of new PUs. A new carbohydrate-based linear P-1 was synthesized by the reaction of 6 and 1,6-hexamethylene diisocyanate (1,6-HMDI). Besides, three new linear PUs (P-2, P-3, and P-4) were synthesized by the reaction of 6, isomannide compound (used in different molar ratios), and 1,6-HMDI. The thermal properties of the new PUs were determined by thermogravimetry (TG), their molecular structures were characterized by FTIR, H-1- and C-13-NMR, and the molecular weights of some polymers were determined by GPC/SEC. Additionally, the surface characteristics of the synthesized PUs were examined via scanning electron microscopy (SEM).Item The relationship between obesity and health related quality of life of women in a Turkish city with a high prevalence of obesityDinç, G; Eser, E; Saatli, G; Cihan, ÜA; Oral, A; Baydur, H; Özcan, CThe purpose of this study was to demonstrate the relationship between body weight and HRQOL in a representative sample of nonpregnant women in reproductive age period. The data of this cross-sectional study was extracted from a survey: Manisa Demographic and Health Survey (MDHS) conducted in Manisa city in 2000. The study population of MDHS is a representative sample of 1602 reproductive (15-49) age women. World Health Organization Quality of Life Questionnaire abbreviated version (WHOQOL-BREF), which was composed of four domain factors (physical, psychological, social relations and the environment), was used to assess HRQOL. Each of four domains had a possible score ranged between 0 (poor HRQOL) and 20 (excellent HRQOL). The mean age of the women was 35.29 +/- 8.19 years. Among them, 35.8 % had normal weight (BMI 18.5 to 24.9), 32.3 % were overweight (BMI 25.0 to 29.9) while 31.9 % were moderate and 3.4% were morbidly obese. After adjusting for age, level of education and co-morbid illnesses, subjects with a BMI higher than normal value, had significantly lower HRQOL scores, compared to normal-weight individuals on each of the domains, except for the environmental domain. Our results suggested that the body weight alone could negatively affect HRQOL. In other words, obesity not only increased the risk of morbidity and mortality, but also affected the perceived health and life quality negatively. In conclusion, in addition to age, socioeconomic status and co-morbid illnesses, body weight should also be controlled in studies examining HRQOL.Item Synthesis of 1,2,3-triazole group-containing isomannide-based aromatic new polyurethanesBayrak, F; Ay, E; Oral, A; Karayildirim, T; Ay, KTen new carbohydrate-based aromatic polyurethanes have been synthesized using isomannide and/or a new 1,2,3-triazole isomannide derivative, IV, as the diol source in the polymerization reactions. As the isocyanate source, 1,4-phenylene diisocyanate or 2,4-toluene diisocyanate was used. To synthesize compound IV, isomannide was tosylated, the tosyl groups were substituted with azide, the triazole ring was formed by reaction with 2,4-pentane dione and finally carbonyl groups were converted into oximes. The synthesis of copolymers and terpolymers was performed using different proportions of diisocyanate and diol sources in DMF. The structural elucidation of the synthesized compounds and polymers was performed using spectroscopic techniques such as FTIR, 1D- and 2D-NMR and HRMS. The thermal behaviour and molecular weight distribution of polymers were analyzed by thermal gravimetric analysis and gel permeation chromatography, respectively. The surface properties of the polymers were analyzed using scanning electron microscopy. A comparative study on thermal behaviour of the synthesized polymers showed that polymers containing a higher amount of compound IV displayed better thermal stability. The average molecular weights of copolymers were observed to vary from 7,900 (PUR-3) to 21,000 (PUR-4) whereas for terpolymers, values of 19,000 (PUR-5), 5,100 (PUR-6), 22,000 (PUR-8) and 28,000 (PUR-9) were found. The diisocyanate source was found to have more effect on the surface properties of polymers than the diol source: when 2,4-toluene diisocyanate was used in polymer synthesis, the resultant polymers had a spongy morphology with cavities while a polymer matrix containing spheres and platelets was obtained when 1,4-toluene diisocyanate was used.Item QUALITY OF LIFE OF WORKERS AGED 14-16 YEARS IN THE MANISA APPRENTICE TRAINING CENTERDündar, PE; Baydur, H; Eser, E; Bilge, B; Nesanir, N; Pala, T; Ergör, A; Oral, AObjective: The literature related to child labor, discusses the causes and socioeconomic factors contributing to child labor but very few studies examine the quality of life among child workers. The purpose of this cross-sectional study was to investigate the quality of life (QoL), socioeconomic and labor related factors in young people aged 14-16 in the city of Manisa. Methods: The study population consisted of 266 students who were attending the Apprentice Training Center in Manisa. The QoL of the subjects was measured by the adolescent version of KINDL-R (Kiddo-Kindl). Odds ratios (95% Confidence Interval) were used in the assessment. Logistic regression analysis was performed in multivariate analysis. Results: Of the 253 adolescent workers, 77.9% were male, with a mean age of 15.6(0.5). According to logistic regression analysis; being female (OR=2.9), lack of family health insurance (OR=2.3), being exposed to family violence (OR=3.7) and absenteeism (OR=2.4) were associated with total Qol. Lack of family health insurance, insufficiency in family income, using alcohol, being exposed to family violence, job dissatisfaction and father illiteracy were associated with poorer QoL of six domains of KINDL-R. Conclusion: The findings of this study concludes that, socioeconomic, family and job related variables are factors associated with QoL in adolescent workers.