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LITERATURE CITED 1. Ang, D.T., Khong, Y.K. & Gan, S.N. (2014). Palm oil--based compound as environmentally friendly plasticizer for poly(vinyl chloride). J. Vinyl Addit. Technol. 22 (1), 80–87. DOI 10.1002/vnl.21434. 2. Hsu, N.Y., Liu, Y.C., Lee, C.W. & Su, H.J. (2017). Higher moisture content is associated with greater emissions of DEHP from PVC wallpaper. Environ. Res. 152, 1–6. DOI: 10.1016/j.envres.2016.09.027. 3. Pyeon, H.B., Park, J.E. & Done, H.S.(2017). Non-phthalate plasticizer from camphor for flexible PVC with a wide range of available temperature

References 1. Chen, J.X., Li, Y., Wang, J., Huang, K., Li, X. & Nie, J. Jiang. (2017). Synthesis and application of environmental soybean oil-based epoxidized glycidyl ester plasticizer for poly(vinyl chloride). European J. Lipid Sci. Technol. 119 (5). DOI: 10.1002/ejlt.201600216. 2. Bocqué, M., Voirin, C., Lapinte, V., Caillol, S. & Robin, J.. (2016). Petro-based and bio-based plasticizers: Chemical structures to plasticizing properties. J. Polym. Sci. Part B: Polymer Physics. 54 (1):11-33. DOI: 10.1002/pola.27917. 3. Choi, W., Chung, J.W. & Kwak, S. (2014

LITERATURE CITED 1. Nagy, T.T., Kelen, T., Turcsányi, B. & Tüdös, F. (1980). The reinitiation mechanism of HCl catalysis in PVC degradation. Polym. Bull. 2(1), 77–82. DOI: 10.1007/BF00275557. 2. Braun, D. (1981). Thermal degradation of poly(vinyl chloride), in Development in polymer degradation, Grassie, N., Eds.; Appl. Sci. Publ.: London, pp 101. 3. Vrandečić, N.S., Klarić, I. & Roje, U. (2001). Effect of Ca/Zn stabiliser on thermal degradation of poly(vinyl chloride)/chlorinated polyethylene blends. Polym. Degrad. Stab. 74(2), 203–212. http://dx.doi.org/10

LITERATURE CITED 1. Jia, P., Zhang, M., Hu, L., Feng, G. & Zhou, Y. (2015). Synthesis of novel caged phosphate esters and their flame retardant effect on poly(vinyl chloride) blends. Chem. Lett. 44, 1220–1222. DOI: 10.1246/cl.150374. 2. Silva, M.A.D., Vieira, M.G.A., Maçumoto, A.C.G. & Beppu, M.M. (2011). Polyvinylchloride (PVC) and natural rubber films plasticized with a natural polymeric plasticizer obtained through polyesterification of rice fatty acid. Polym. Test . 30, 478–484. DOI: http://dx.doi.org/10.1016/j.polymertesting.2011.03.008 . 3. Saeki, Y

Influence of the coating process parameters on the quality of PUR/PVP hydrogel coatings for PVC medical devices

To decrease friction factor and enhance the biocompatibility of medical devices manufactured from poly(vinyl chloride), PVC, the surface modification with wear resistant polyurethane/polyvinylpyrrolidone (PUR/PVP) hydrogel coating can be applied. In the present work substrates were dip-coated with PVP and PUR solutions and thermally cured. The variable process parameters were: solvent system; concentration of polymers (1, 2 or 3% w/v); coating baths temperature (22, 38 and 55°C); drying temperature (32, 50 and 67°C); length of break between process steps (5, 30 and 90 s); and solutions storage time (up to 72 hrs). The quality of coatings was determined by friction coefficients against porcine aorta, weights of the deposited layer and the swelling capacity. The solvent system and polymers concentration were crucial factors. The increased temperature of coating solutions caused increased deposition but decreased durability. The most lubricious samples were dried in 50°C. Coatings from the solutions prepared 24h prior to use had better properties than those from fresh solutions.

). Polyvinylchloride (PVC) and natural rubber films plasticized with a natural polymeric plasticizer obtained through polyesterification of rice fatty acid. Polym. Test , 30, 478–484. DOI: 10.1016/j.polymertesting.2011.03.008. 15. Bueno-Ferrer, C., Garrigós, M.C. & Jiménez, A. (2012). Characterization and thermal stability of poly(vinyl chloride) plasticized with epoxidized soybean oil for food packaging. Polymer Degrad. Stab. , 95, 2207–2212. DOI: 10.1016/j.polymdegradstab.2010.01.027. 16. Karmalm, P., Hjertberg, T., Jansson, A. & Dahl, R. (2009). Thermal stability of poly(vinyl

Abstract

The purpose of the present work was the elaboration of research methodology of the exhaustion degree of performance properties of pipes based on unsaturated polyester and glass fibers, which were manufactured by the cross winding method on a poly(vinyl chloride) core. Within the frame of the work we conducted fatigue-ageing tests being the simulation tool of the degradation process of polyester-glass pipes. Diagnosis of the composite material condition was conducted with the use of nondestructive ultrasonic testing with the application of the echo method, in which the transition time of ultrasonic wave was determined as the identifying parameter. The registered transition time of ultrasonic wave allowed the identification of the material condition during the course of pipes exploitation.

ABSTRACT

Present study aims to investigate the influence of relative breakwater width W/L (W=width of breakwater, L=wavelength), wave steepness Hi/gT2 (Hi=incident wave height, T=wave period) and relative wave height d/W (d=water depth) on forces in the moorings of horizontal interlaced multi-layered moored floating pipe breakwater (HIMMFPB) model. Studies were conducted on scaled down physical models having three layers of Poly Vinyl Chloride (PVC) pipes, wave steepness Hi/gT2 varying from 0.063 to 0.849, relative width W/L varying from 0.4 to 2.65 and relative spacing S/D=2 (S=horizontal centre-to-centre spacing of pipes, D=diameter of pipes). Peak mooring forces were also measured and data collected is analyzed by plotting non-dimensional graphs depicting variation of fs/γW2 (fs=Sea side Mooring force, γ=specific weight of water) & fl/γW2 (fl=Lee side Mooring force) with Hi/gT2 for d/W varying from 0.082 to 0.276 and also variation of fs/γW2 and fl/γW2 with W/L for Hi/d varying from 0.06 to 0.400.

coatings. Polimery 2012, 11/12, 57 , 865 - 868. [5] Sasimowski E.: Studies in the effectiveness of a new generation extruder. Part I. The influence of the location of the rotating sleeve of the barrel in the plasticizing system.Polimery 2011, 5, 56 , 390 - 396. [6] Samujło B, Sikora J. W.: The impact of selected granulometric properties of poly(vinyl chloride) on the effectiveness of the extrusion process. Journal of Polymer Engineering 2013, 1, 33 , 77-85. [7] Dulebová L., Greškovič F., Spišák E., Duleba B.: Tool steels for injection forms and adhesive wearing of

Temperature Ionic Liquids. Int. J. Electrochem. Sci. 2013;8:1. 28. Farnoush F, Meraj S, Morteza P. Symmetric and Asymmetric PVC Membrane Potentiometric Electrodes for the Analysis of Morphine Hydrochloride. Anal. Bioanal. Electrochem. 2016;8:8. 29. Al-BayatiYK. Al-jabari FI. Constraction of new selective electrodes for determination ibuprofen and their application in pharmaceutical samples. I.J.R.P.C. 2015;5:3. 30. Al-Bayati YK, Al-Saidi KH, Hussain MA. liquid selective electrodes for warfarin sodium based on poly(vinyl chloride) matrix membrane, Asian j of chem. 2016