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https://open.uns.ac.rs/handle/123456789/28496
Title: | Aliphatic polycarbonate-based polyurethane nanostructured materials. The influence of the composition on thermal stability and degradation | Authors: | Porȩba Rafal Špirkova, Milena Pavličević, Jelena Budinski-Simendić, Jaroslava Mesaroš-Sečenji (Mészáros Szécsényi), Katalin Holló, Berta |
Issue Date: | Mar-2014 | Publisher: | Elsevier | Journal: | Composites Part B: Engineering | Abstract: | Thermal properties of new materials usually determine their applicability to special purpose. In order to follow the influence of the composition on the thermal decomposition pattern of segmented polycarbonate-polyurethanes (PC-PUs), a series of unfilled and filled elastomers based on different polycarbonate diols and their mixtures, hexamethylene diisocyanate and 1,4-butane diol as chain extender were synthesized. Hard segment (HS) content in final materials was in the range from 8 to 35 wt.%. Nanocomposites were obtained by dispersion of organically modified bentonite additive (1 wt.%). Thermogravimetric analysis coupled with differential scanning calorimetry (TG-DSC) was used to study the influence of macrodiol chain constitution, HS content and bentonite addition on the decomposition of PC-PUs under dynamic temperature conditions. It was found that the highest thermal stability belongs to the elastomers prepared without chain extender. The decomposition temperatures (To) of PC-PUs increase with decreasing HS content. The significant enhancement of thermal stability is achieved in polyurethanes with higher HS content and well dispersed nano-scale layered bentonite particles. The regularity in thermal decomposition pattern and the hard segment content is used to determine the composition of polyurethane materials. © 2013 Elsevier Ltd. All rights reserved. | URI: | https://open.uns.ac.rs/handle/123456789/28496 | ISSN: | 1359-8368 | DOI: | 10.1016/j.compositesb.2013.11.006 (BISIS)84056 (BISIS)84056 |
Appears in Collections: | TF Publikacije/Publications |
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