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3
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Zou H, Wang L, Yi C, Liu H, Xu W. Thermal, rheological, mechanical, and dyeing property studies of poly(ethylene-co-trimethylene terephthalate) copolymer filaments. POLYM ENG SCI 2010. [DOI: 10.1002/pen.21635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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11
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Liu W, Mohanty AK, Drzal LT, Misra M, Kurian JV, Miller RW, Strickland N. Injection Molded Glass Fiber Reinforced Poly(trimethylene terephthalate) Composites: Fabrication and Properties Evaluation. Ind Eng Chem Res 2005. [DOI: 10.1021/ie049112f] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wanjun Liu
- Composite Materials and Structures Center, 2100 Engineering Building, Michigan State University, East Lansing, Michigan 48824, The School of Packaging, 130 Packaging Building, Michigan State University, East Lansing, Michigan 48824, and Sorona R&D, Bio-Based Materials, E. I. du Pont de Nemours and Company, Inc., Wilmington, Delaware 19880
| | - Amar K. Mohanty
- Composite Materials and Structures Center, 2100 Engineering Building, Michigan State University, East Lansing, Michigan 48824, The School of Packaging, 130 Packaging Building, Michigan State University, East Lansing, Michigan 48824, and Sorona R&D, Bio-Based Materials, E. I. du Pont de Nemours and Company, Inc., Wilmington, Delaware 19880
| | - Lawrence T. Drzal
- Composite Materials and Structures Center, 2100 Engineering Building, Michigan State University, East Lansing, Michigan 48824, The School of Packaging, 130 Packaging Building, Michigan State University, East Lansing, Michigan 48824, and Sorona R&D, Bio-Based Materials, E. I. du Pont de Nemours and Company, Inc., Wilmington, Delaware 19880
| | - Manjusri Misra
- Composite Materials and Structures Center, 2100 Engineering Building, Michigan State University, East Lansing, Michigan 48824, The School of Packaging, 130 Packaging Building, Michigan State University, East Lansing, Michigan 48824, and Sorona R&D, Bio-Based Materials, E. I. du Pont de Nemours and Company, Inc., Wilmington, Delaware 19880
| | - Joseph V. Kurian
- Composite Materials and Structures Center, 2100 Engineering Building, Michigan State University, East Lansing, Michigan 48824, The School of Packaging, 130 Packaging Building, Michigan State University, East Lansing, Michigan 48824, and Sorona R&D, Bio-Based Materials, E. I. du Pont de Nemours and Company, Inc., Wilmington, Delaware 19880
| | - Ray W. Miller
- Composite Materials and Structures Center, 2100 Engineering Building, Michigan State University, East Lansing, Michigan 48824, The School of Packaging, 130 Packaging Building, Michigan State University, East Lansing, Michigan 48824, and Sorona R&D, Bio-Based Materials, E. I. du Pont de Nemours and Company, Inc., Wilmington, Delaware 19880
| | - Nick Strickland
- Composite Materials and Structures Center, 2100 Engineering Building, Michigan State University, East Lansing, Michigan 48824, The School of Packaging, 130 Packaging Building, Michigan State University, East Lansing, Michigan 48824, and Sorona R&D, Bio-Based Materials, E. I. du Pont de Nemours and Company, Inc., Wilmington, Delaware 19880
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12
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Wright-Charlesworth DD, Miller DM, Miskioglu I, King JA. Nanoindentation of injection molded PLA and self-reinforced composite PLA afterin vitro conditioning for three months. J Biomed Mater Res A 2005; 74:388-96. [PMID: 16013062 DOI: 10.1002/jbm.a.30353] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Poly(lactic acid) (PLA) is used for medical devices such as sutures or orthopedic screws. A standard way to determine the loss of mechanical properties of a degradable polymer would be to soak the polymer in phosphate buffered saline (PBS) and test the desired property as a function of immersion time. This method is not sensitive enough to discern changes in mechanical properties through the cross-section of the polymer and neglects the degradation that is occurring at the molecular level. This article presents results of a nanoindentation study carried out with PLA. The modulus and hardness of PLA is characterized as a function of processing method, immersion time in PBS, and location of the indent. Measuring local properties with the nanoindenter allowed detection of differences in material properties as a function of all three of these variables. The mechanical properties on the edge were lower than the interior of the sample after in vitro degradation, and changes were seen earlier for nanoindentation than for traditional flexural or tensile tests. The nanoindenter is a valuable tool for quantifying changes in material properties and may have applicability for accelerated tests to screen biomaterials.
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Affiliation(s)
- Debra D Wright-Charlesworth
- Department of Biomedical Engineering, Michigan Technological University, 1400 Townsend Dr., Houghton, Michigan 49931, USA.
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14
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Frisk S, Ikeda RM, Chase DB, Kennedy A, Rabolt JF. Structural Analysis of Poly(trimethylene terephthalate) Fibers and Films Using Polarized Raman Spectroscopy. Macromolecules 2004. [DOI: 10.1021/ma049234j] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Simon Frisk
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19711, and Central Research and Development, E. I. DuPont de Nemours & Company Inc., Wilmington, Delaware 19880
| | - Richard M. Ikeda
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19711, and Central Research and Development, E. I. DuPont de Nemours & Company Inc., Wilmington, Delaware 19880
| | - D. Bruce Chase
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19711, and Central Research and Development, E. I. DuPont de Nemours & Company Inc., Wilmington, Delaware 19880
| | - Alan Kennedy
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19711, and Central Research and Development, E. I. DuPont de Nemours & Company Inc., Wilmington, Delaware 19880
| | - John F. Rabolt
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19711, and Central Research and Development, E. I. DuPont de Nemours & Company Inc., Wilmington, Delaware 19880
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