Cationic cure kinetics of a polyoxometalate loaded epoxy nanocomposite

Journal Article · Mon Aug 06 04:00:00 EDT 2012 · Journal of Polymer Science Part A: Polymer Chemistry

DOI:https://doi.org/10.1002/pola.26258· OSTI ID:1068479

Anderson, Benjamin J.

The reaction cure kinetics of a novel polyoxometalate (POM) loaded epoxy nanocomposite is described. The POM is dispersed in the epoxy resin up to volume fractions of 0.1. Differential scanning calorimetry measurements show the cure of the epoxy resin to be sensitive to the POM loading. A kinetics study of the cure exotherm confirms that POM acts as a catalyst promoting cationic homopolymerization of the epoxy resin. The cure reaction is shown to propagate through two cure regimes. A fast cure at short time is shown to be propagation by the activated chain end (ACE) mechanism. A slow cure at long time is shown to be propagation by the activated monomer (AM) mechanism. The activation energies for the fast and slow cure regimes agree well with other epoxy based systems that have been confirmed to propagate by the ACE and AM mechanisms.

• Research Organization: Sandia National Laboratories
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1068479
• Report Number(s): SAND2012-2612J
• Journal Information: Journal of Polymer Science Part A: Polymer Chemistry, Journal Name: Journal of Polymer Science Part A: Polymer Chemistry Journal Issue: 21 Vol. 50; ISSN 0887-624X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY