Elevated environmental consciousness among producers and consumers has resulted in significant interest
and research in seed oil derived building blocks for polymer synthesis. While slowly making inroads
into selected applications, performance deficits have consistently relegated seed oil derived
elastomers to roles having low performance requirements, or where biodegradability is paramount. In
this article ester alcohol A-B monomers derived from reductively hydroformylated seed oil fatty acids are
polymerized to make polyester soft segments. The seed oil components are separated following functionalization
and then polymerized to make soft segments of varying molecular weight, functionality,
and with varying polymerization initiators. The soft segments are subsequently polymerized with isocyanates
and short chain diols to make thermoplastic polyurethane elastomers of varying compositions.
High quality elastomers are obtained that meet tensile requirements for demanding applications. The
structure, thermodynamic behavior, and mechanical properties of the elastomers are explained semiquantitatively
by combining theory of block copolymer microphase separation and a two-phase composite
model. It is proposed that superior properties of the new elastomers could be understood in light
of a relatively large Flory-Huggins parameter between the polyester soft segment and the urethane hard
segment.
Elevated environmental consciousness among producers and consumers has resulted in significant interestand research in seed oil derived building blocks for polymer synthesis. While slowly making inroadsinto selected applications, performance deficits have consistently relegated seed oil derivedelastomers to roles having low performance requirements, or where biodegradability is paramount. Inthis article ester alcohol A-B monomers derived from reductively hydroformylated seed oil fatty acids arepolymerized to make polyester soft segments. The seed oil components are separated following functionalizationand then polymerized to make soft segments of varying molecular weight, functionality,and with varying polymerization initiators. The soft segments are subsequently polymerized with isocyanatesand short chain diols to make thermoplastic polyurethane elastomers of varying compositions.High quality elastomers are obtained that meet tensile requirements for demanding applications. Thestructure, thermodynamic behavior, and mechanical properties of the elastomers are explained semiquantitativelyby combining theory of block copolymer microphase separation and a two-phase compositemodel. It is proposed that superior properties of the new elastomers could be understood in lightof a relatively large Flory-Huggins parameter between the polyester soft segment and the urethane hardsegment.
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