The crystallinity and thermal degradation behaviour of polyamide 6/oil based mud fillers (PA6/OBMFs) nanocomposites.

Siddique, Shohel; Kwoffie, Lorraine; Addae-Afoakwa, Kofi; Yates, Kyari; Njuguna, James

Abstract

The crystallinity and thermal degradation behaviours of Polyamide 6/Oil Based Mud Fillers (PA6/OBMFs) nanocomposites have been investigated using DSC and TGA. TGA indicates the onset decomposition temperature of D1/2 (half-decomposition) is 16º C higher for PA6 with 10.0 wt.% of OBMFs than that of PA6, whereas the lowest onset decomposition temperature difference among the nanocomposites and neat PA6 is 8º C for PA6 with 7.5 wt.% of OBMFs. However PA6 with 5.0 wt. % OBMFs nanocomposite has taken the longest time (1minute 36 seconds more than neat PA6) to reach D1/2. It can be deduced in this study that PA6 with 5.0 wt. % OBMFs nanocomposite provided the maximum heat resistant property whereas PA6 with 7.5 wt. % OBMFs nanocomposite showed the maximum heat absorbance property among different nanocomposites and PA6 with 10.0 wt. % exhibited the maximum thermal stability. There is a sigmoidal curve generated based on the TIF and wt% filler content value which shows three significant points at intersections of 50% TIF line which are highlighted as exfoliation (4.2 wt.%), intercalation (6.8 wt.%) and agglomeration (9.0 wt.%) points. These TIF values explained the investigated heat resistant, heat capacity and thermal stability properties of PA6/OBMFs nanocomposites illustrating the ratio of TIF and MAF is the key measure which can be considered as an effective approach to identify the nanomorphology of PA6/OBMFs nanocomposites.

Citation

SIDDIQUE, S., KWOFFIE, L., ADDAE-AFOAKWA, K., YATES, K. and NJUGUNA, J. 2019. The crystallinity and thermal degradation behaviour of polyamide 6/oil based mud fillers (PA6/OBMFs) nanocomposites. Polymer degradation and stability [online], 159, pages 139-152. Available from: https://doi.org/10.1016/j.polymdegradstab.2018.11.004

• Journal Article Type: Article
• Acceptance Date: Nov 5, 2018
• Online Publication Date: Nov 10, 2018
• Publication Date: Jan 31, 2019
• Deposit Date: Nov 9, 2018
• Publicly Available Date: Nov 11, 2019
• Journal: Polymer Degradation and Stability
• Print ISSN: 0141-3910
• Electronic ISSN: 1873-2321
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 159
• Pages: 139-152
• DOI: https://doi.org/10.1016/j.polymdegradstab.2018.11.004
• Keywords: Polyamide 6; Nanocomposite; Thermal degradation; Crystallinity; Rigid amorphous fraction; Mobile amorphous fraction
• Public URL: http://hdl.handle.net/10059/3211