966 2013 eng 2058 2065 12 11 article 1 -- -- -- Shape memory polyurethanes (SMPUs) were synthesized by 4,4′-diphenylmethane diisocyanate (MDI), hexane-1,6-diol (HD), polypropylene glycol (PPG), and recycled polyvinyl butyral (PVB). Dynamic mechanical analysis, differential scanning calorimetry and Fourier transformation infrared attenuated total reflection spectroscopy was used to characterize the poly (vinylbutyral-urethanes). Micro-phase domain separation of hard and soft segments and phase inversion were investigated. Increasing the hard segment content, i.e., average hard segment molecular weight, leads to an increase in the degree of micro-phase separation, hard domain order and crystallinity. The crystalline hard segment structures combined with the elastic nature of soft segment matrix provide enough physical and chemical crosslinks to have shape memory effect. Central European Journal of Chemistry 2391-5420 urn:nbn:de:kobv:526-opus4-9664 Tsonev, T., Herzog, M. & Nenkova, S. (2013). Shape memory polyurethanes based on recycled polyvinyl butyral. I. Synthesis and morphology. Open Chemistry, 11(12), pp. 2058-2065. Retrieved 29 May. 2017, from doi:10.2478/s11532-013-0331-3 https://doi.org/10.2478/s11532-013-0331-3 Creative Commons - CC BY-NC-ND 3.0 - Namensnennung - Nicht-kommerziell - Keine Bearbeitung 3.0 Unported Tsvetomir Tsonev Michael Herzog Sanchi Nenkova Chemie und zugeordnete Wissenschaften Fachbereich Ingenieurwesen / Wirtschaftsingenieurwesen (bis 8/2014) open_access Green Open Access Technische Hochschule Wildau https://opus4.kobv.de/opus4-th-wildau/files/966/s11532-013-0331-3.pdf