Synthesis and characterization of castor oil-segmented thermoplastic polyurethane with controlled mechanical properties

Luong Nguyen Dang, Sinh Le Hoang, Minna Malin, Jürgen Weisser, Torsten Walter, Matthias Schnabelrauch, Jukka Seppälä*

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

47 Sitaatiot (Scopus)

Abstrakti

Novel castor oil-segmented thermoplastic polyurethane series (PUs) have been prepared and extensively characterized in this study. The castor oil, poly(tetrahydrofuran) polyol, and poly(dimethylsiloxane) have been employed as soft segments in the polymer synthesis with a maximum bio-based content up to 14.1 wt%. We demonstrate here that it is possible to prepare thermoplastic polyurethane containing castor oil via polyaddition approach in which the formation of prepolymer needs to be carried out with the addition of reasonably small amount of castor oil together with excess amount of the diisocyanate in the very first step. This is followed by the addition of the other polyols and finally a low molecular weight chain extender. The developed synthesis resulted in the formation of branched thermoplastic polyurethane with an elongation at break of about 1200%, which is considerably high compared to reported values for polyurethanes containing castor oil as soft segments. We have demonstrated that mechanical properties and flexibility of polyurethane can be significantly altered by both incorporated castor oil and controllable poly(dimethylsiloxane)/poly(tetrahydrofuran) polyol ratio during the synthesis. Especially the synthesized polyurethanes exhibited good biocompatibility and high transparency, which are useful properties for polymers as potential biomaterials. In addition, thermal stability and thermal transition of polyurethanes have been investigated.

AlkuperäiskieliEnglanti
Sivut129-137
Sivumäärä9
JulkaisuEuropean Polymer Journal
Vuosikerta81
DOI - pysyväislinkit
TilaJulkaistu - 1 elok. 2016
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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