PMID- 28773134 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201001 IS - 1996-1944 (Print) IS - 1996-1944 (Electronic) IS - 1996-1944 (Linking) VI - 10 IP - 7 DP - 2017 Jul 10 TI - Effect of Starch Loading on the Thermo-Mechanical and Morphological Properties of Polyurethane Composites. LID - 10.3390/ma10070777 [doi] LID - 777 AB - 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 x 10(-3) J/mm(2), 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 degrees C and at 127 degrees C for PUS-0.5 wt.% and rises with increasing loading from 0.5 to 2 wt.%. FAU - Gaaz, Tayser Sumer AU - Gaaz TS AD - Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, University Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia. taysersumer@gmail.com. AD - Center for Advanced Materials, College of Engineering, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia. taysersumer@gmail.com. FAU - Sulong, Abu Bakar AU - Sulong AB AD - Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, University Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia. abubakar@ukm.edu.my. FAU - Ansari, M N M AU - Ansari MNM AD - Center for Advanced Materials, College of Engineering, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia. ansari@uniten.edu.my. FAU - Kadhum, Abdul Amir H AU - Kadhum AAH AD - Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia. amir8@ukm.edu.my. FAU - Al-Amiery, Ahmed A AU - Al-Amiery AA AD - Energy and Renewable Energies Technology Center, University of Technology, Baghdad 10001, Iraq. dr.ahmed1975@gmail.com. FAU - Nassir, Mohamed H AU - Nassir MH AD - Program of Chemical Engineering, Taylor's University-Lakeside Campus, Subang Jaya 47500, Selangor, Malaysia. mohamedh.nassir@taylors.edu.my. LA - eng PT - Journal Article DEP - 20170710 PL - Switzerland TA - Materials (Basel) JT - Materials (Basel, Switzerland) JID - 101555929 PMC - PMC5551820 OTO - NOTNLM OT - composite OT - mechanical properties OT - polyurethane OT - starch OT - thermal stability COIS- The authors declare no conflict of interest. EDAT- 2017/08/05 06:00 MHDA- 2017/08/05 06:01 PMCR- 2017/07/10 CRDT- 2017/08/05 06:00 PHST- 2017/04/18 00:00 [received] PHST- 2017/06/10 00:00 [revised] PHST- 2017/06/13 00:00 [accepted] PHST- 2017/08/05 06:00 [entrez] PHST- 2017/08/05 06:00 [pubmed] PHST- 2017/08/05 06:01 [medline] PHST- 2017/07/10 00:00 [pmc-release] AID - ma10070777 [pii] AID - materials-10-00777 [pii] AID - 10.3390/ma10070777 [doi] PST - epublish SO - Materials (Basel). 2017 Jul 10;10(7):777. doi: 10.3390/ma10070777.