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Characteristics of Biodegradable Poly(Ester-Urethanes) with Side Chains

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Mechanics of Composite Materials Aims and scope

Abstract

Two series of segmented poly(ester-urethanes) (SPEU) have been studied. The flexible segment of SPEU was formed from polycaprolactonediols (PCL diols) with a molecular mass of 600 to 10000 and the rigid one — from a blend of 2.4 and 2.6-toluene diisocyanates (TDI) and a chain extender. The first series of SPEU contained no side branches, whereas in the second series, side branches in the form of long chains of aliphatic structure were present at the rigid segment. The tensile strength of SPEU decreased when the molecular mass of the flexible segment increased from 600 to 2000; in this case, the specimens were of amorphous structure. An increase in the molecular mass of the flexible segment from 2000 to 10000 led to an increase in its degree of crystallinity and in the melting point, fusion enthalpy, tensile strength, yield stress in tension, and packing coefficient of SPEU. The side chains at the rigid segment affected the degree of phase separation insignificantly, but decreased the order of the structure, the glass transition temperature, and strength properties of SPEU, whereas the side chains at the flexible segment reduced its crystallinity.

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REFERENCES

  1. R. Yoda, “Elastomers for biomedical application,” Biomater. Sci. Polym. Ed., 9, No. 6, 561-626 (1998).

    Google Scholar 

  2. J. H. Groot, R. de Vrijer, B. S. Wirdeboer, and C. S. Spaans, “New biomedical polyurethane ureas with high tear strengths,” Polym. Bull., 38, 211-218 (1997).

    Google Scholar 

  3. J. Kylmä and J. V. Seppälä, “Synthesis in characterisation of a biodegradable thermoplastic poly(ester-urethane) elastomer,” Macromolecules, 30, No. 10, 2876-2882 (1997).

    Google Scholar 

  4. B. Bogdanov, V. Toncheva, and L. Finelli, “Physical properties of poly(ester-urethanes) prepared from different molar mass polycaprolactone-diols,” Polymer, 40, No. 11, 3171-3182 (1999).

    Google Scholar 

  5. T. M. Chen, Y. F. Wany, S. Sakamoto, K. Okada, and T. Nakaga, “Novel segmented polyurethanes having galactiol analogous groups,” Designed Monomers Polym., 1, No. 4, 447-465 (1998).

    Google Scholar 

  6. A. Alksnis and U. Stirna, Bioabbaubare PUR-Schaumstoffe. 27 Jahrestagung der GUS. Karlsruhe. Umwelteinflusse erfassen, simulieren, bewerten., 18-20 Marz (1998), S. 13-1-13-10.

  7. U. K. Stirna, V. A. Yakushin, A. F. Alksnis, and I. V. Shits, “Effect of flexible and rigid side chains on the structure and properties of poly(ester-urethanes),” Polym. Sci., 41B, No. 7, 1206-1211 (1999).

    Google Scholar 

  8. V. A. Yakushin and U. K. Stirna, “Effect of side branches on the properties of cross-linked polyurethanes,” Mech. Compos. Mater., 33, No. 6, 596-599 (1997).

    Google Scholar 

  9. A. Alksnis and U. Stirna, Polyurethanschaumstoffe aus nachwachsendem Rohstoff. 28 Jahrestagung der GUS. Karlsruhe, 10-12 Marz (1999), S. 12-1-12-10.

  10. R. T. Storey and A. E. Tayler, “Effect of stannous octoate on the composition molecular weight and molecular weight distribution of ethylene glycol-initiated poly(-caprolactone),” J. Macromol. Sci., 35, No. 5, 723-750 (1998).

    Google Scholar 

  11. V. A. Kargin (ed.), Encyclopedia of Polymers. Vol. 1 [in Russian], Sovetskaya Entsiklopedia, Moscow (1972).

    Google Scholar 

  12. M. Fischer, F. Lohse, and R. Schmidl, “Struktureller Aufbau und Physikalishes verhalten vernetzten Epoxidharze,” Macromol. Chem., No. 6, 1251-1287 (1980).

  13. R. F. Fedors, “A method for estimating both the solubility parametrs and molar volumes of liquids,” Polym. Eng. Sci., 114, No. 2, 147-154 (1974).

    Google Scholar 

  14. A. A. Askadskii, “Calculation methods for determining the physical characteristics of polymers,” Usp. Khim., No. 6, 1122-1151 (1977).

  15. F. A. Shutov (ed.), Composite Materials Based on Polyurethanes [Russian translation], Khimiya, Moscow (1982).

    Google Scholar 

  16. V. E. Gul' and V. N. Kuleznev, Structure and Mechanical Properties of Polymers [in Russian], Vysshaya Shkola (1979).

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Authors and Affiliations

  1. Latvian State Institute of Wood Chemistry, Riga, LV-1006, Latvia

    U. Stirna & V. Yakushin

  2. Institute of Polymer Materials, Riga Technical University, Riga, LV-1048, Latvia

    A. Dzene, V. Tupureina & I. Shits

Authors
  1. U. Stirna
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  2. V. Yakushin
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  3. A. Dzene
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  4. V. Tupureina
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  5. I. Shits
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Stirna, U., Yakushin, V., Dzene, A. et al. Characteristics of Biodegradable Poly(Ester-Urethanes) with Side Chains. Mechanics of Composite Materials 36, 403–408 (2000). https://doi.org/10.1023/A:1026655419187

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  • DOI: https://doi.org/10.1023/A:1026655419187

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