Volume 30, Issue 4 pp. 872-878
RESEARCH ARTICLE

Syntheses of biodegradable polymer networks based on polycaprolactone and glutamic acid

Soo Yong Park

Soo Yong Park

Department of Polymer Science and Engineering, Pusan National University, Busan, South Korea

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Soo-Yeon Kim

Soo-Yeon Kim

Department of Polymer Science and Engineering, Pusan National University, Busan, South Korea

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Taeyoon Kim

Taeyoon Kim

Department of Polymer Science and Engineering, Pusan National University, Busan, South Korea

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Heejoon Ahn

Corresponding Author

Heejoon Ahn

Department of Organic and Nano Engineering, Hanyang University, Seoul, South Korea

Correspondence

Ildoo Chung, Professor, Department of Polymer Science and Engineering, Pusan National University, Busan 46241, South Korea.

Email: [email protected]

Heejoon Ahn, Professor, Department of Organic and Nano Engineering, Hanyang University, Seoul 04763, South Korea.

Email: [email protected]

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Ildoo Chung

Corresponding Author

Ildoo Chung

Department of Polymer Science and Engineering, Pusan National University, Busan, South Korea

Correspondence

Ildoo Chung, Professor, Department of Polymer Science and Engineering, Pusan National University, Busan 46241, South Korea.

Email: [email protected]

Heejoon Ahn, Professor, Department of Organic and Nano Engineering, Hanyang University, Seoul 04763, South Korea.

Email: [email protected]

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First published: 19 December 2018
Citations: 7
Soo Yong Park, Soo-Yeon Kim, and Taeyoon Kim contributed equally to this study.

Abstract

Biodegradable trifunctional oligomer was synthesized from polycaprolactone and glutamic acid and characterized by Fourier-transform infrared (FTIR) and proton nuclear magnetic resonance (1H NMR) spectroscopies. Injectable and in situ crosslinkable polymer networks were fabricated by the copolymerization of oligomer with triethylene glycol dimethacrylate (TEGDMA) and used to evaluate the initial compressive strengths, viscosities, shrinkages, thermal stabilities, and biodegradabilities in the forms of polymer network neat resin and their composites with β-tricalcium phosphate. The initial compressive strengths (CS) values of neat resins ranged from 9.54 to 187.6 MPa. Both neat resins and composites had polymerization shrinkage ranging from 0% to 11.7%, which increased with increasing of TEGDMA contents in resin. Moreover, in polymer composite resins, shrinkage values decreased with increasing filler level from 0% to 4.6%, and exothermic evolution values decreased from 33.5°C to 29.7°C as increasing filler level. The composite with the formulation of (polycaprolactone)-glutamate triacrylate (PCLGTA)/TEGDMA (25/75) and powder/liquid (P/L) ratio of 1.0 exhibited the highest exothermal and lowest shrinkage values. The increase of oligomer in the formulation led to an increase in viscosity.

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