Effect of starch loading on the thermo-mechanical and morphological properties of polyurethane composites

Tayser Sumer Gaaz, Abu Bakar Sulong, Mohamed Ansari Mohamed Nainar, Abdul Amir H. Kadhum, Ahmed A. Al-Amiery, Mohamed H. Nassir

Research output: Contribution to journalArticle

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Abstract

The advancements in material science and technology have made polyurethane (PU) one of the most important renewable polymers. Enhancing the physio-chemical and mechanical properties of PU has become the theme of this and many other studies. One of these enhancements was carried out by adding starch to PU to form new renewable materials called polyurethane-starch composites (PUS). In this study, PUS composites are prepared by adding starch at 0.5, 1.0, 1.5, and 2.0 wt.% to a PU matrix. The mechanical, thermal, and morphological properties of PU and PUS composites were investigated. Scanning electron microscope (SEM) images of PU and PUS fractured surfaces show cracks and agglomeration in PUS at 1.5 wt.% starch. The thermo-mechanical properties of the PUS composites were improved as starch content increased to 1.5 wt.% and declined by more starch loading. Despite this reduction, the mechanical properties were still better than that of neat PU. The mechanical strength increased as starch content increased to 1.5 wt.%. The tensile, flexural, and impact strengths of the PUS composites were found to be 9.62 MPa, 126.04 MPa, and 12.87 × 10-3 J/mm2, respectively, at 1.5 wt.% starch. Thermal studies showed that the thermal stability and crystallization temperature of the PUS composites increased compared to that of PU. The loss modulus curves showed that neat PU crystallizes at 124 °C and at 127 °C for PUS-0.5 wt.% and rises with increasing loading from 0.5 to 2 wt.%.

Original languageEnglish
Article number777
JournalMaterials
Volume10
Issue number7
DOIs
Publication statusPublished - 10 Jul 2017

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Polyurethanes
Starch
Composite materials
Mechanical properties

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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Gaaz, Tayser Sumer ; Sulong, Abu Bakar ; Mohamed Nainar, Mohamed Ansari ; Kadhum, Abdul Amir H. ; Al-Amiery, Ahmed A. ; Nassir, Mohamed H. / Effect of starch loading on the thermo-mechanical and morphological properties of polyurethane composites. In: Materials. 2017 ; Vol. 10, No. 7.
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Effect of starch loading on the thermo-mechanical and morphological properties of polyurethane composites. / Gaaz, Tayser Sumer; Sulong, Abu Bakar; Mohamed Nainar, Mohamed Ansari; Kadhum, Abdul Amir H.; Al-Amiery, Ahmed A.; Nassir, Mohamed H.

In: Materials, Vol. 10, No. 7, 777, 10.07.2017.

Research output: Contribution to journalArticle

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AU - Al-Amiery, Ahmed A.

AU - Nassir, Mohamed H.

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