Synthesis of Soy-Polyol by Two Step Continuous Route and Development of Soy-Based Polyurethane Foam
- 349 Downloads
Soy-polyol has been synthesized via a low energy two-step continuous route thus avoiding intermediate steps and chemicals. The functional groups of soy-polyol thus produced were identified by Fourier transform infrared (FTIR) spectroscopy which confirmed the cleavage of the double bonds, the formation of new epoxy linkages and the presence of hydroxyl groups. The change in chemical structure and physical properties of the soy polyol was further characterized and the results indicated a successful conversion with reduced unsaturation, increased hydroxyl number and increased viscosity. Polyurethane foam was prepared from soy-polyol using isocyanate and thermogravimetric analysis was used to study its thermal decomposition behaviour. Multiple transitions were identified in relation to depolymerization and bond dissociation. Density and compressive strength of the soy-foam were found to be satisfactory. An investigation of microstructure of soy foam by scanning electron microscope and X-ray computed tomography revealed the internal cell morphology and cell structure.
KeywordsSoybean oil Polyol Polyurethane foam Soy-foam Epoxydation Microstructure
The authors acknowledge Dr. I. Banik, S. Ghosh Roy, and V. Mavisakalyan from the Faculty of Forestry at the University of Toronto for their help. They also acknowledge Arkema Canada Inc., BioCar® and Natural Sciences and Engineering Research Council of Canada for supporting the project.
- 1.Chuayjuljit S, Sangpakdee T, Saravari O (2007) J Met Mater Miner 17(1):17–23Google Scholar
- 2.Guo A, Javni I, Petrovic Z (1999) ACS PMSE Preprints 80:503Google Scholar
- 4.Dahlke B, Poltrock R, Larbig H, Scherzer HD (1998) J Cell Plast 34:361Google Scholar
- 6.Reed D (1997) Urethane Technol 14:20Google Scholar
- 7.Baser SA, Khakhar DV (1993) Cell Polym 12:390Google Scholar
- 10.Szycher M (1999) Szycher’s handbook of polyurethanes. CRC Press, Boca RatonGoogle Scholar
- 11.ASTM (1997) In: Annual book of standards. ASTM, West Conshohocken, PA, Method D1959-97Google Scholar
- 12.AOCS (1997) Hydroxyl value of epoxidized oils, official methods and recommended practices of the AOCS, 5th edn. AOCS Press, Champaign, Official Method Tx 1a-6Google Scholar
- 13.Doi M, Edwards SF (1992) The theory of polymer dynamics, vol 73. Oxford University Press, New YorkGoogle Scholar
- 18.Bakirova IN, Vluev VI, Demchenko IG, Zenitova LA (2002) J Polym Sci A 44(6):615–622Google Scholar