Polyurethanes (Pu’s) are the polymeric materials which have got urethane groups in the structure. The properties of Pu’s depend both on the method of preparation and monomers used. Polyurethanes are produced by two methods known as one step or two step method called as “pre-polymers method”, especially for the case of segmented polyurethanes (SPU’s). These materials are thermoplastic block copolymers of the (AB)n type consisting of alternating sections of hard segments, composed of a diisocyanate and a low molecular weight diol chain extender, and soft segments, generally composed of various types of polyols, also called macrodiols. In the two steps method for SPU synthesis, a pre-polymer is first obtained and then chain extended is added to the reaction system.Using novel components in polyurethane synthesis leads to change the rheological properties of pre-polymers what effect on characteristic of polyurethane systems during their production and the change in gel point of polyurethane materials. The aim of this work was determined the rheological properties of pre-polymers ob-tained using bio-based polyols. Influence on temperature measurements on this characteristic was also investigated.
Authors
Additional information
- Category
- Aktywność konferencyjna
- Type
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Language
- angielski
- Publication year
- 2013
