Effect of Polyol/Di-Isocyanates Concentration and Temperature on the Synthesis of Polyurethane Foam
|International Journal of Engineering Trends and Technology (IJETT)||
|© 2014 by IJETT Journal|
|Year of Publication : 2014|
|Authors : S. Abdehamid Ahmed
S. Abdehamid Ahmed. "Effect of Polyol/Di-Isocyanates Concentration and Temperature on the Synthesis of Polyurethane Foam", International Journal of Engineering Trends and Technology (IJETT), V17(3),115-119 Nov 2014. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group
A number of polyurethanes (PUs) from renewable resource e were synthesized by reacting castor oil with polymeric 4,4 ?diphenylmethane diisocynate (PMDI). Different NCO/OH ratios such as 1.2, 1.5, 1.8 and 2 was applied. Preparation of polyurethane werecarried out at 17, 30, 40, 50, 65 and 72 oC for each NCO/OH ratio. Milled fiber glass with average size 200 µm was dispersed in the pre-polymer with weight fractions 5 up to 50% by intense mixing (1000 rpm) in open and isothermal systems in order to study the effect of the filler contents on the gel time. The results showed that both of the temperature and the NCO/OH ratio have a significant effect on the gel time. Filler loading showed no significant effect on the gel time of the isothermal system. Predictable gel time model which is function in the temperature and NCO/OH ratio was achieved. This model can play an important role to estimate the safe conversion for reactor operation and the cycle time during the polyurethane production.
1- J. Brandrup and E. H. Immergut and Wiley, Polymer Handbook, 3rd. ed., 1989
2- Arvind Shukla and R. M. V. G. K. RAO, Curing Studies on Modified Epoxy and Unsaturated Polyester Resins Journal of Applied Polymer Science, 29, pp. 1553-1558 (1984).
3- Anil Srivastava and P. Singh, Gel point prediction of Metal-filled Castor Oil- based Polyurethanes system, polym. Adv.Technol. 13, pp. 1055- 1066 (2002).
4- Rao, R.M.V.G.K. and Pourassamy, Studies on the curing of a loaded unsaturated polyester binder. Polymer, 17. pp. 611-612 (1976).
5- Zoran S. Petrovi?, Wei Zhang, Alisa Zlatan?, Charlene C.Lava, and Michal Ilavský, Effect of OH/NCO molar ratio on properties of Soy-based polyurethane networks, Polymer and Environment, 10, pp. 5-12 (2002).
6- L.Mat?jka and K.Dušek, Formation of polyurethane networks studied by the gel point method, 7th IUPAC discussion conference “ polymer network”, polymer Bulletin 3, pp. 489-595 (1980).
7- P. S. Tukums, U.K. Stirna,U. K. Silis, V. A. Yakushin, and I. V. Sevast`yanova, Possibility of describing process of formation of polyurethane foams by the use of foaming parameters, Mekhanika Kompozitnykh Materialov, 4, pp. 703–707 (1985).
8- Huibo Zhang, W. Li, Xujie Yang, Yongchun Zhang and Yadong Chen, Micro structural characterizations and mechanical behavior of polyurethane elastomers strengthened with milled fiber glass, Materials processing technology 190, pp. 96-101 (2007).
9- Hamdi Yeganeh and Mohammad Reza Mehdizadeh, Synthesis and properties of isocynate curable mllable polyurethane elastomers based on castor oil as a renewable resources polyol, European polymer, 40, pp. 1233-1238 (2004).
10- M. Bassyouni , Sayed A., Sherif , M.A., Sadek and F.H., Ashour, Synthesis and characterization of Polyurethane – treated waste milled light bulbs composites, Composites Part B: Engineering, Volume 43, Issue 3, April 2012, PP1439–1444
11- M. Bassyouni and Saud. A. Gutub, Materials Selection strategy and surface treatment of polymer composites for wind turbine blades fabrication, Polymer & Polymer composites journal, Polymer & polymer composites journal, Vol.21, No. 7, 2013.
12- Nadeem Iqbal, Sadia Sagar, Mohammad Bilal Khan, Mohamed Bassyouni, Zaffar M. Khan, Aluminum silicate fibers impregnated acrylonitrile butadiene rubber composites: Ablation, thermal transport/stability, and mechanical inspection, Volume 130, Issue 6, pages 4392–4400, 2013.
13- M. Bassyouni, S. Gutub and Shereen M.S Abdel-hamid. Dissolved solids adsorption of freshwater using synthesized bio-foam composite, Life Sci J 2013;10(2):464-471.
14- M. Sh. Zoromba, M. Bassyouni and A. Dahshan, Preparation and Mechanico-Optical properties of UV-Curable Transparent Polyurethane Elastomer Nanocomposites, Journal Nanotechnology in Engineering and Medicine, February 2012, Vol. 3 / 011008-1
15- M. Bassyouni, I. Taha, Shereen M.-S. Abdel-hamid and L. Steuernagel “Physico-Mechanical Properties of Chemically Treated Polypropylene Rice Straw bio-Composites”. Journal of Reinforced Plastics and Composites, March 2012 31: 303-312, 2012 doi: 10.1177/0731684411436024.
16- Sayed A.Sherif, M.A.Sadek, F.H.Ashour, M. Bassyouni, 2009. Effects of surface treatment of ground rice husk on the polyurethane based on castor oil. Polymer & Polymer composites, 17 (8), pp 467-471
17- R.Sakthivel , D.Rajendran. "Experimental Investigation and Analysis a Mechanical Properties of Hybrid Polymer Composite Plates", International Journal of Engineering Trends and Technology (IJETT), V9(8),407-414 March 2014. ISSN:2231-5381
Castor oil, PMDI, Polyurethane, Fiber glass, Gel time, EDS, SEM