Effect of Surface Functionalization on the Physicomechanical Properties of a Novel Biofunctional Copolymer
No Thumbnail Available
Date
2011
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
JOURNAL OF APPLIED POLYMER SCIENCE
Abstract
The physicomechanical properties of functionally active poly(hydroxyethyl methacrylate-co-methyl methacrylate) [poly(HEMA-co-MMA)] are evaluated. It has been reported that the surface phosphorylated poly(HEMA-co-MMA) is capable of eliciting direct bone bonding when implanted in vivo. Hence, it is important to examine the physicomechanical property of the copolymer as a function of surface modification. The properties assessed are differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), equilibrium swelling, compressive strength, and dynamic mechanical analysis. According to the DSC data, the glass transition temperature, T-g of poly(HEMA-co-MMA) is not significantly altered by surface phosphorylation. The TGA results demonstrated that unmodified and surface phosphorylated copolymers have similar degradation profile. The differential thermal analysis further supports the data. The equilibrium swelling of functionalized poly(HEMA-co-MMA) in phosphate buffer saline ascertained that surface phosphorylation significantly increased the hydrophilicity of the copolymer. The study further illustrated that the percentage of equilibrium swelling appreciably increases with increase in HEMA content in the copolymer and reached a plateau after 100 h. Both compressive strength and compressive modulus of poly (HEMA-co-MMA) decreased due to surface phosphorylation while dynamic storage modulus value was not altered. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 3509-3515, 2011
Description
Keywords
Polymer Science
Citation
121 ,6;3509-3515