Abstract
The effects of glycerin and glycerol monostearate (GMS) on a variety of properties of anhydrous wheat starch are explored by means of DSC, TGA, as well as mechanical, rheological and moisture sorption assessment. It is found that, as glycerin content (GC) increases, both melting point and degradation temperature decrease, and the range of the processing window extends. Melt viscosity of the glycerin-plasticized starch depends on shear rate following power law, exponentially on GC, and on temperature in Arrhenius type. Increasing GC leads to a linear increment of the equilibrium moisture sorption, which, however, can be depressed significantly by incorporating a small amount of GMS. Moreover, the presence of 2% GMS in the formulations can efficiently reduce the melt viscosity and enhance its temperature sensitivity while has insignificant effect on the non-Newtonian behaviour and mechanical properties.
Similar content being viewed by others
References
N. W. Cervone and J. M. Harper, J. Food Process Eng. 2 (1978) 83.
M. Bhattacharya and M. A. Hanna, J. Food Technol. 21 (1986) 167.
A. Senouci and A. C. Smith, Rheol. Acta 6 (1988) 649.
K. L. Mackey and R. Y. Ofoli, J. Food Sci. 2 (1990) 417.
J. L. Willett, B. K. Jasberg and C. L. Swanson, Polym. Eng. & Sci. 2 (1995) 202.
D. Lourdin, H. Bizot and P. Colonna, J. Appl. Polym. Sci. 8 (1997) 1047.
J. Yu, S. Chen, J. Gao, H. Zheng, J. Zhang and T. Lin, Starch/Stärke 6 (1998) 246.
W. Aichholzer and H. G. Fritz, Starch/Stärke 3 (1998) 77.
S. H. D. Hulleman, F. H. P. Janssen and H. Feil, Polymer 10 (1998) 2043.
P. Forssell, J. Mikkila, T. Suortti, J. Seppala and K. Poutanen, J. Macromol. Sci. A 5 (1996) 703.
J. J. G. Van Soest, D. De Wit and J. F. G. Vliegenthart, J. Appl. Polym. Sci. 11 (1996) 1927.
J. J. G. Van Soest and N. Knooren, J. Appl. Polym. Sci. 7 (1997) 1411.
M. C. Van Dper Burgt, M. E. Van Der Woude and L. P. B. M. Janssen, Journal of Vinyl and Additive Technology 2 (1996) 170.
J. Yu, J. Gao and T. Lin, J. Appl. Polym. Sci. 9 (1996) 1491.
H. Potente, A. R Öcher and B. Natrop, Starch/Stärke 46 (1994) 52.
J. J. G. Van Soest, PhD dissertation (Utrecht University, Utrecht, 1996) p. 43.
Z. Q. Liu, Y. Feng and X.-S. Yi, J. Appl. Polym. Sci. 74 (1999) 2667.
J. Falter, K. Geick, L. Hall and J. Williams, in Proceedings of Antec'94 Conference, San Francisco, May 1994, p. 2804.
M. Mondragon, O. S. Rodriguez and A. C. Flores, Rev. Plast. Mod. 432 (1992) 684.
B. Nielson, in Proceedings of International Conference on Additives for Polyolefins, Houston, February 1998, p. 123.
H. G. Franke and D. R. Bittner, US 5512090 A 960430.
Z. Q. Liu, PhD dissertation (Zhejiang University, Hangzhou, 1998) p. 81.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Liu, Z.Q., Yi, XS. & Feng, Y. Effects of glycerin and glycerol monostearate on performance of thermoplastic starch. Journal of Materials Science 36, 1809–1815 (2001). https://doi.org/10.1023/A:1017589028611
Issue Date:
DOI: https://doi.org/10.1023/A:1017589028611