Spin-Spin Relaxation Time to Evaluate Degradation of HIPS/Organoclaynano Composites by Aging - Materials Sciences and Applications

MSA > Vol.8 No.5, May 2017

Materials Sciences and Applications

Volume 8, Issue 5 (May 2017)

ISSN Print: 2153-117X ISSN Online: 2153-1188

Google-based Impact Factor: 0.97 Citations

Spin-Spin Relaxation Time to Evaluate Degradation of HIPS/Organoclaynano Composites by Aging ()

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Download as PDF (Size: 630KB) PP. 342-350

DOI: 10.4236/msa.2017.85023 1,174 Downloads 2,035 Views Citations

Author(s)

Paulo Sergio Rangel Cruz da Silva, Gisele Cristina Valle Iulianelli, Maria Inês Bruno Tavares

Affiliation(s)

Instituto de Macromoléculas Professora Eloisa Mano-IMA,Universidade Federal do Rio de Janeiro-UFRJ, Rio de Janeiro-RJ, Brasil.

ABSTRACT

NMR relaxometry is one of the techniques that allow observing changes in the molecular mobility that come from materials’ morphology. T₁H has been used to monitor food and polymer sciences. However, T2>H, although being a revealing as T1>H, is rarely used to analyze changes in thermoplastic systems it is more sensitive to the mobile region. High Impact Polystyrene nanomaterials were prepared through solution casting and were exposed for different times to UV light in the air. The samples, removed after each exposure interval, were characterized by T2>H, focusing on the changes in the relaxation data. The results for this parameter showed that the changes in the relaxation data come from the competition of chain scission and chain recombination processes, which occurs due to the UV light influence with increased time. The T2>H data indicated that the clay ratio can influence the chain degradation processes, acting to inhibit or accelerate the aging process [1] [2].

KEYWORDS

Degradation, High Impact Polystyrene, Nanocomposites, Relaxometry, Spin-Spin

Share and Cite:

da Silva, P. , Iulianelli, G. and Tavares, M. (2017) Spin-Spin Relaxation Time to Evaluate Degradation of HIPS/Organoclaynano Composites by Aging. Materials Sciences and Applications, 8, 342-350. doi: 10.4236/msa.2017.85023.

Cited by

[1]	Nano lamellar zirconium phosphate and screw speed changing properties of melt extrusion polypropylene nanocomposites
	2021

[2]	Investigation on Structural, Morphological and Relaxometric Properties of Lamellar Zrp Modified with Long Chain Amine
	2019

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