The physicochemical properties of polyhydroxyalkanoates with different chemical structures

Описание

Тип публикации: статья из журнала

Год издания: 2013

Идентификатор DOI: 10.1134/S0965545X13070080

Ключевые слова: Amorphous and crystalline phasis, Degrees of crystallinity, Physicochemical property, Poly(3-hydroxybutirate), Polyhydroxyalkanoate copolymer, Temperature characteristic, Thermal degradation temperatures, Thermoplastic materials, Copolymers, Monomers, Thermoplastic elastomers, Structure (composition)

Аннотация: A set of polyhydroxyalkanoates are synthesized, and a comparative study of their physicochemical properties is performed. The molecular masses and polydispersities of polyhydroxyalkanoates are found to be independent of their chemical structures. It is shown that the temperature characteristics and degrees of crystallinity of polyhПоказать полностьюydroxyalkanoates are affected by the chemical compositions of the monomers and their quantitative contents in the polymers. The incorporation of 4-hydroxybutyrate, 3-hydroxyvalerate, and 3-hydroxyhexanoate units into the chain of poly(3-hydroxybutyrate) decreases its melting point and thermal degradation temperature relative to these parameters of a homogeneous poly(3-hydroxybutyrate) sample (175 +/- 5A degrees C and 275 +/- 5A degrees C, respectively). The higher the content of the second monomer units in the poly(3-hydroxybutirate) chain, the greater the changes. The degrees of crystallinity of polyhydroxyalkanoate copolymers are generally lower than that of poly(3-hydroxybutyrate) (75 +/- 5%). The effect on the ratio of the amorphous and crystalline phases of the copolymer samples becomes more pronounced in the series 3-hydroxy-valerate-3-hydroxyhexanoate-4-hydroxybutyrate. The prepared samples exhibit different properties ranging from rigid thermoplastic materials to engineering elastomers.

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Издание

Журнал: POLYMER SCIENCE SERIES A

Выпуск журнала: Vol. 55, Is. 7

Номера страниц: 427-437

ISSN журнала: 0965545X

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Volova T.G. (Siberian Federal University)
  • Zhila N.O. (Siberian Federal University)
  • Shishatskaya E.I. (Siberian Federal University)
  • Sukovatyi A.G. (Institute of Biophysics,Siberian Branch,Russian Academy of Sciences)
  • Sinskey A.J. (Massachusetts Institute of Technology)
  • Mironov P.V. (Siberian State Technological University)
  • Vasil'Ev A.D. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)

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