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Effect of resin hydrophilicity and temperature on water sorption of dental adhesive resins

Paper ID Volume ID Publish Year Pages File Format Full-Text
10757 702 2006 9 PDF Available
Title
Effect of resin hydrophilicity and temperature on water sorption of dental adhesive resins
Abstract

This study examined the effects of copolymer hydrophilicity and temperature on water sorption and solubility characteristics of five copolymer blends of increasing degree of hydrophilicity using gravimetric measurements. Six resin disks (15 mm in diameter×1 mm in thickness) were prepared from each copolymer blend and were stored in deionised water at 23, 37 and 55 °C. Water sorption and solubility of the resin disks were measured before and after water immersion and desiccation. Multiple regression analysis of water sorption was performed on two independent variables, copolymer hydrophilicity and temperature. Maximum water sorption increased significantly with Hoy's total cohesive energy density (δtδt), Hoy's solubility parameter for polar forces (δpδp) and hydrogen bonding (δhδh), but was not influenced by temperature. However, a significant positive relationship was observed between diffusion coefficients (obtained using Fick's law of diffusion) and temperature. The water absorption activation energy was 10 kJ/mol for the most hydrophilic copolymer blend R5 and 35–51 kJ/mol for copolymer blends R1–R4. The positive relationship between maximum water uptake and copolymer hydrophilicity suggests that water molecules diffuse through the polymer matrices by binding successively to the polar sites via hydrogen bonding. Such water sorption may determine the durability of resin–dentine bonds.

Keywords
Water sorption; Solubility parameter; Hydrophilicity; Temperature; Resin
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Effect of resin hydrophilicity and temperature on water sorption of dental adhesive resins
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 27, Issue 9, March 2006, Pages 1695–1703
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us