| Title |
Influence of calcium carbonate fillers on the properties of recycled poly(e-caprolactone) based thermoplastic polyurethane |
| Another Title |
Kalcio karbonato tipo užpildų įtaka termoplastinio poli-6-heksanolidinio poliuretano antrinių mišinių savybėms. |
| Authors |
Betingytė, Vitalija ; Žukienė, Kristina ; Jankauskaitė, Virginija ; Milašienė, Daiva ; Mickus, Kazys Vytautas ; Gulbinienė, Ada |
| DOI |
10.5755/j01.ms.18.3.2433 |
| Full Text |
|
| Is Part of |
Materials science = Medžiagotyra.. Kaunas : KTU. 2012, vol. 18, no. 3, p. 243-249.. ISSN 1392-1320. eISSN 2029-7289 |
| Keywords [eng] |
Thermoplastic poly(e-caprolactone) based polyurethane ; Calcium carbonate fillers ; Hydrolytic degradation ; Mechanical properties ; Melt flow ; Shape memory |
| Abstract [eng] |
In this work the effects of different crystallographic modifications of calcium carbonate (CaCO3) filler on the melt flow, mechanical properties, hydrolytic degradation, and shape memory behaviour of recycled low-temperature poly(e-caprolactone)-based polyurethane (rTPU) were evaluated. Composites were prepared by two-roll milling varying filler content from 2 wt % to 6 wt %. It was found that at temperature range from 20 °C to 50 °C CaCO3 fillers do not change Young’s modulus, they decrease tensile stress and deformation of rTPU, but improve its mechanical properties at elevated temperatures (up to 65 °C). rTPU melt flow index increases due to chain scission during the recycling and filler mixing with mill. Therefore, destruction temperature of rTPU is 20 °C lower than that of TPU. The CaCO3 does not change shape memory properties independently of filler type and transition from secondary shape to the primary shape at 70 °C temperature is completed within 17 s for both filled and unfilled rTPU. The investigation of hydrolytic degradation shows that CaCO3 only slightly increases degradation rate of rTPU. |
| Published |
Kaunas : KTU |
| Type |
Journal article |
| Language |
English |
| Publication date |
2012 |
| CC license |
|
