Effect of unsaturated polyester concentration on rheological characteristics of polypropylene-unsaturated polyester reactive blend
DOI:
https://doi.org/10.3329/cerb.v14i2.5955Keywords:
DCP, strain rate, degradation, graftingAbstract
Reactive blends of polypropylene and unsaturated polyester with different compositions were prepared by melt processing using dicumyl peroxide (DCP) as initiator in a plasticoder. Rheological Characteristics of the blends were studied as a function of unsaturated polyester concentration over a range of strain rate. The possibility of forming a graft polymer increased with increasing the unsaturated polyester content. Change in viscosity behavior of the blends was a result of the competing reactions of degradation and grafting.
Keywords: DCP; strain rate; degradation; grafting
DOI = 10.3329/cerb.v14i2.5955
Chemical Engineering Research Bulletin 14 (2010) 105-108
Downloads
708
1077
References
Fried JR, Polymer Science and Technology, Prentice-Hall, New Delhi, 1999
Wan C, Patel SH and Xanthos M, Reactive melt modification of polypropylene with a crosslinkable polyester, Polymer Engineering and Science, 2003. 43(6):pp. 12761288. doi:10.1002/pen.10108
Mackenzie MW, Polymeric film: US Patent 4771108, 1988
BoonWand Henderson J, High performance rubber-polyester blends: US patent 4558096, 1985, uS Patent 4,558,096
Joffrion R, Polar resins having improved characteristics by blending with EPM and EPDM polymers: US Patent 4251644, 1981
Sunseri R and ORourke M, Polyesters having improved impact strength: US Patent 4977217, 1990
Fink J, Reactive polymers fundamentals and applications: a concise guide to industrial polymers, PDL handbook series, William Andrew, 2005
Carreau PJ, Rheological Equations from Molecular Network Theories, Journal of Rheology, 1972. 16(1):pp. 99127. doi:10.1122/1.549276
Cross MM, Rheology of non-Newtonian fluids: A new flow equation for pseudoplastic systems, Journal of Colloid Science, 1965. 20(5):pp. 417 437. doi:10.1016/0095-8522(65)90022-X
Reiner M, Deformation, strain and flow: an elementary introduction to rheology, H. K. Lewis, 1960
Vanderbilt J and Meyer Jr M, Polypropylene-graft unsaturated polyester compositions and process for the production thereof: US Patent 5432230, 1995
Liang JZ, Characteristics of melt shear viscosity during extrusion of polymers, Polymer Testing, 2002. 21(3):pp. 307 311. doi:10.1016/S0142-9418(01)00088-5
Azizi H, Ghasemi I and Karrabi M, Controlled-peroxide degradation of polypropylene: Rheological properties and prediction of MWD from rheological data, Polymer Testing, 2008. 27(5):pp. 548 554. doi:10.1016/j.polymertesting.2008.02.004
Dautant F, Simancas K, Sandoval A and Müller A, Effect of temperature, moisture and lipid content on the rheological properties of rice flour, Journal of Food Engineering, 2007. 78(4):pp. 1159 1166. doi:10.1016/j.jfoodeng.2005.12.028
Cogswell F, Polymer melt rheology: a guide for industrial practice, George. Godwin in association with Plastics and Rubber Institute, 1981
