Volume 120, Issue 4 pp. 2390-2399

Star-shape poly(acrylic acid)-composed glass-ionomer cements: Effects of MW and arm number on mechanical properties

Jun Zhao,

Jun Zhao

Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907

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Yiming Weng,

Yiming Weng

Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907

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Dong Xie,

Corresponding Author

Dong Xie

[email protected]

Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907

Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis, Indiana 46202

Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907===Search for more papers by this author

Jun Zhao,

Jun Zhao

Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907

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Yiming Weng,

Yiming Weng

Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907

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Dong Xie,

Corresponding Author

Dong Xie

[email protected]

Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907

Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis, Indiana 46202

Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907===Search for more papers by this author

First published: 10 December 2010

https://doi.org/10.1002/app.33451

Citations: 6

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Abstract

This study reports the synthesis and characterization of the star-shape poly(acrylic acid)s with different arm numbers and molecular weight (MW)s. The effects of arm number and initiator concentration on the atom-transfer radical polymerization reaction kinetics and solution viscosity were studied. The effects of MW and arm number on mechanical properties were evaluated. The results showed that both arm number and MW had significant impacts on the polymerization kinetics, solution viscosity, mechanical strengths, and wear-resistance. Decreasing arm number and increasing initiator concentration increased the reaction rate. Increasing arm number and initiator concentration decreased the solution viscosity. Decreasing arm number and increasing MW increased mechanical strengths and wear-resistance. Within the limitations of this study, the experimental cement was 28% in compressive strength, 48% in compressive modulus, 39% in diametral tensile strength, 60% in flexural strength, and 62% in Knoop hardness higher but 19% in fracture toughness lower than commercial Fuji II LC cement. The abrasion and attrition of the experimental cement were only 1.3% and 9.5% of Fuji II LC. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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Volume120, Issue4

15 May 2011

Pages 2390-2399

Star-shape poly(acrylic acid)-composed glass-ionomer cements: Effects of MW and arm number on mechanical properties

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Star-shape poly(acrylic acid)-composed glass-ionomer cements: Effects of MW and arm number on mechanical properties

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