Abstract
The aim of this work was to determine the influence of clay nanoparticles on thermal properties of segmented polyurethanes based on hexamethylene- diisocyanate, aliphatic polycarbonate diol and 1,4-butanediol as chain extender. The organically modified particles of montmorillonite and bentonite were used as reinforcing fillers. The structure of elastomeric materials was varied either by diol type or chain extender content. The ratio of OH groups from diol and chain extender (R) was either 1 or 10. Thermal properties of prepared materials were determined using modulated differential scanning calorimetry (MDSC). Thermal stability of obtained elastomers has been studied by simultaneously thermogravimetry coupled with DSC. The glass transition temperature, Tg, of soft segments for all investigated samples was about -33?C. On the basis of DTG results, it was concluded that obtained materials were very stable up to 300?C.
Highlights
DSC curves of polyurethanes based on polycarbonate diol T4671 reinforced with different clay particles, prepared with R = 1
The simultaneous TG/DTG and the corresponding DSC curve of the polyurethane elastomer based on macrodiol T4671, for R = 1
On the basis of DTG results, it was concluded that obtained materials were very stable up to 300 °C
Summary
TERMIČKA STABILNOST SEGMENTIRANIH POLIURETANSKIH ELASTOMERA OJAČANIH ČESTICAMA GLINE. Cilj ovog rada je bio ispitivanje uticaja nanočestica gline na toplotna svojstva segmentiranih poliuretana dobijenih reakcijom polikarbonatnog diola, heksametilen-diizocijanata i produživača lanca 1,4-butandiola. Poslednjih godina sintetisani su poliuretanski materijali na osnovu novih tipova makrodiola kod kojih se mogu postići izuzetno dobra krajnja svojstva (termička stabilnost, čvrstoća) u veoma širokom opsegu temperatura i deformacije [10]. Industrijska istraživanja su dovela do razvoja poliuretanskih elastomera na osnovu novih tipova polikarbonatnih diola koji imaju znatno poboljšana mehanička [11], anti-hidrolizaciona i anti-oksidacion svojstva u poređenju sa klasičnim tipovima poliuretana [12,13]. Cilj ovog rada je bio da se ispita uticaj nanočestica gline na toplotna svojstva segmentiranih poliuretana dobijenih reakcijom polikarbonatnog diola, heksametilen-diizocijanata i produživača lanca 1,4-butandiola. Struktura dobijenih materijala je varirana ili promenom sadržaja produživača lanca ili tipom makrodiola
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
