Organomodified Clay and its Influence on Thermal and Fire Behaviors of Clay/Fire Retardant/Poly Vinyl Ester Composites

Abstract:

The objective of this research was to examine the synergistic effect of organomodified nanoclay and fire retardants on the thermal decomposition, glass transition temperature and fire retardation behaviour of nanoclay/Poly vinyl ester composites. The two nanoclays such as Cloisite-15A and Cloisite-Na are used along with two fire retardants as Aluminium Tri Hydroxide (ATH) and Magnesium Hydroxide (MH) in the present study. The nanoclay/fire retardants were dispersed in poly vinyl ester using twin screw extrusion. TEM and AFM of nanoclay/Poly vinyl ester specimens revealed that 4 wt% Cloisite-15A/Poly vinyl ester exhibited exfoliation and distribution of nanoclay which were superior to that of Cloisite-Na/Poly vinyl ester. The synergistic effect of Cloisite-15A and 30 % ATH increased glass transition temperature by 18 % and reduced thermal degradation by 47 % and Limiting Oxygen Index (LOI) by 52 % when compared with that of Poly vinyl ester after the curing process in all the cases.

• Periodical: Key Engineering Materials (Volume 659)
• Pages: 468-473
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.659.468
• Online since: August 2015
• Authors: K. R. Vishnu Mahesh, H.N. Narasimha Murthy, B.E. Kumara Swamy, N. Raghavendra, M. Krishna
• Keywords: Fire Retardants, LOI, Nanoclay, Nanocomposites, Poly Vinyl Ester, Vinylester

References

[1] Farzana Hussain, Mehdi Hojjati, Masami Okamoto et al, Review article: Polymer-matrix Nanocomposites, Processing, Manufacturing, and Application: An Overview, Journal of Composite Material. 40 (2006) 1511-1575.

DOI: 10.1177/0021998306067321

[2] P. Kiliaris, C.D. Papaspyrides, Polymer/layered silicate (clay) nanocomposites: An overview of flame retardancy, Progress in Polymer Science. 2010, 35, 902-958.

DOI: 10.1016/j.progpolymsci.2010.03.001

[3] M.F. Uddin, C. T Sun. Effect of nanoparticle dispersion on mechanical behavior of polymer nanocomposites, In: 50th AIAA/ ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Palm Springs, California, USA. (2009) 4–7.

DOI: 10.2514/6.2009-2333

[4] In-Yup Jeon, Jong-Beom Baek et al, Nanocomposites Derived from Polymers and Inorganic Nanoparticles, Materials. 3 (2010) 3654-3674.

DOI: 10.3390/ma3063654

[5] L. A. Hollingbery, T.R. Hull, The Fire Retardant Behaviour of Huntite and Hydromagnesite - A Review, Polymer Degradation and Stability. 95(2010) 2213-2225.

DOI: 10.1016/j.polymdegradstab.2010.08.019

[6] C. Aaron Small, Thomas Plaisted, et al, A Non-Halogenated Flame Retardant Additive for Pultrusion, American Composites Manufacturers Association, Tampa, USA. (2007) 17-19.

[7] Hyung Mi Lim, Joonho Yun, Mikyung Hyun et al, Magnesium hydroxide flame retardant and its application to a low density polyethylene/ethylene vinyl acetate composite, Journal of Ceramic Processing Research, 10 (2009) 571-576.

[8] C. Aaron , CCT-CP Small , Martin et al, A Novel Non-Halogenated Flame Retardant for Composite Materials, Composites Convention and Trade Show. 1 (2006) 18-20.

[9] E.D. Weil, S.V. Levchik et al, Flame Retardant in commercial use or development of polyolefins, Journal of Fire Science. 26 (2008) 5-43.

DOI: 10.1177/0734904107083309

[10] Grace Chigwada, Panchatapa Jash, David D. Jiang, Charles A. Wilkie, Fire retardancy of vinyl ester nanocomposites: Synergy with phosphorus-based fire retardants, Polymer Degradation and Stability. 89 (2005) 85-100.

DOI: 10.1016/j.polymdegradstab.2005.01.005