Next Article in Journal
Synthesis of Polylactic Acid Initiated through Biobased Antioxidants: Towards Intrinsically Active Food Packaging
Previous Article in Journal
Delayed Addition of Template Molecules Enhances the Binding Properties of Diclofenac-Imprinted Polymers
Previous Article in Special Issue
Effects of Rutile–TiO2 Nanoparticles on Accelerated Weathering Degradation of Poly(Lactic Acid)
Open AccessArticle

Effect of Different Phosphate Glass Compositions on the Process-Induced Macromolecular Dynamics of Polyamide 66

1
Department of Polymer Science and Engineering, The University of Southern Mississippi, 118 College Drive #5050, Hattiesburg, MS 39406, USA
2
Institut Supérieur de Plasturgie d’Alençon (ISPA), Campus d’Alençon, 61250 Damigny, France
3
Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, Qatar
*
Authors to whom correspondence should be addressed.
Polymers 2020, 12(5), 1179; https://doi.org/10.3390/polym12051179
Received: 4 March 2020 / Revised: 12 April 2020 / Accepted: 15 April 2020 / Published: 21 May 2020
(This article belongs to the Special Issue Polymer Nanocomposites: Processing, Degradation and Applications)
The present study provides a fundamental understanding of the mechanism of action of special new phosphate glass (P-glass) systems, having different glass transition temperatures (Tg), in polyamide 66 (PA66). Dynamic mechanical analysis (DMA) revealed that the Tg of PA66/low Tg P-glass (ILT-1) was significantly shifted to a lower Tg (65 °C), and another transition appeared at high temperature (166 °C). This was supported by a drop in the melting point and the crystallinity of the PA66/ILT-1 hybrid material as detected by differential scanning calorimetry (DSC). The dielectric spectroscopic investigation on the networks’ molecular level structural variations (Tg and sub-Tg relaxations) agreed very well with the DMA and DSC findings. Contrary to intermediate Tg(IIT-3) and high Tg P-glass (IHT-1) based materials, the PA66/ILT-1 hybrid material showed an evidence of splitting the PA66 Tg relaxations into two peaks, thus confirming a strong interaction between PA66 and ILT-1 (low Tg P-glass). Nevertheless, the three different P-glass compositions did not show any effect on the PA66 sub-Tg relaxations (related to the –NH2 and –OH chain end groups’ motion). View Full-Text
Keywords: broadband dielectric spectroscopy; polyamide 66; inorganic phosphate glass; chemical mechanism; molecular chain dynamics broadband dielectric spectroscopy; polyamide 66; inorganic phosphate glass; chemical mechanism; molecular chain dynamics
Show Figures

Graphical abstract

MDPI and ACS Style

Belyamani, I.; K. Hassan, M. Effect of Different Phosphate Glass Compositions on the Process-Induced Macromolecular Dynamics of Polyamide 66. Polymers 2020, 12, 1179.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop