Thermal and Morphological Properties of Chitosan Filled Epoxy


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This paper investigates the effects of polysaccharide additive agent on the morphological and thermal properties of thermosetting polymer. The weight percentage (wt%) of Diglycidyl Ether of Bisphenol A (DGEBA) epoxy resin to Hexamethylenediamine (HMDA) hardener were kept constant while a varying wt% of chitosan, ranging from 0 to 10 wt% was introduced. The chitosan filled epoxy hardener mixture was allowed to cure at 40°C for a period of 12 hours. Dynamic Scanning Calorimetry (DSC) and Thermal Gravimetric Analysis (TGA) were conducted on the specimens to analyse the effects of chitosan loading on thermal stability and transition temperature while Atomic Force Microscopy (AFM) was used to investigate the changes to its morphological property. At chitosan loading of 2.5 wt% and below, good dispersion of the additive was observed. Apparent agglomeration and phase separation were formed when chitosan content increases above 7.5 wt%. The formation of bulky chitosan agglomeration was found capable of enhancing the thermal stability of the thermoset polymer. The diamine acted as the co-reactants with DGEBA as well as spacer which decrease the effect of material brittleness due to addition of chitosan.



Edited by:

Bale V. Reddy, Shishir Kumar Sahu, A. Kandasamy and Manuel de La Sen




B. Satheesh et al., "Thermal and Morphological Properties of Chitosan Filled Epoxy", Applied Mechanics and Materials, Vol. 627, pp. 12-17, 2014

Online since:

September 2014




* - Corresponding Author

[1] Selektor S.L., Semyachkin M. Yu., Arslanov V.V., A Composite Hardener for Epoxy Adhesives, Journal of Applied Chemistry, 76(8), 1368-1374 (2003).

[2] Zhang Q.X., Bannister M., Mai Y.W., Investigation of the Mechanical Properties of DGEBA-based Epoxy Resin with Nanoclay Additives, Composite Structures 75, 514–519 (2006).

[3] Kuwahara H., Echigo M., Koyama T., Epoxy Resin Curing Agent of Aliphatic Acid Diamine/Styrene Addition of Products, US Patent 7, 396, 902 B2, Jul. 8 (2008).

[4] Mari Tiiitu, Anja Talo, Olof Forsen, Olli Ikkala, Aminic Epoxy Resin Hardeners as Reactive Solvents for Conjugated Polymers: Polyaniline base/Epoxy Composites for Anticorrosion Coatings, Polymer, Vol. 46, 6855-6861 (2005).


[5] Dusek K., Plegtil J. Lednicky F., Are Cured Epoxy Resin Inhomogeneous?, Polymer, 19, 393-397 (1978).

[6] Zhang Z., Yu Y.Z., Studies on isotactic poly (Phenyl glycidyl ether) - modified epoxy resins. II. Toughening of Epoxy Resins, Journal of Applied Polymer Science, 84(6), 1223–1232 (2002).


[7] Morishita T., Ochi M., Kokufu S., Harada M., Network chain orientation in the toughening process of the elastomer modified mesogenic epoxy resin, Polymer, 42(24), 9687–9695 (2001).


[8] Vineeta N., Setua D.K., Mathur G.N., Failure analysis of rubber toughened epoxy Resin, Journal of Applied Polymer Science, 87(5), 861–868 (2003).


[9] Soares P., Valeria D., George W.M., Regina Sandra V., Hydroxy-terminated polybutadiene toughened epoxy resin: Chemical modification, microstructure, and impact strength, Advances in Polymer Technology. 21(1), 25–32 (2002).

[10] Liu Y.L., Chen Y.J., Wei W.L., Novel thermosetting resins based on 4-(Nmaleimidophenyl) glycidylether I. Preparation and characterization of monomer and cured resins, Polymer, 44(21), 6465-6473 (2003).


[11] Inmaculada A., Ruth H., Angeles H., Chitosan Amphiphilic Derivatives. Chemistry and Applications, Current Organic Chemistry, 14, 308-330 (2010).

[12] Butler. F.M., Ng. Y., Pudney A.D.P., Mechanism and Kinetics of the Crosslinking Reaction Between Biopolymers containing Primary Amine Groups and Genipin , Journal of Polymer Science: Part A : Polymer Chemistry, Vol. 41, 3941-3953 (2003).


[13] Ritzenthaler S., Girard-Reydet E. and Pascault J.P., Influence of Epoxy Hardener on Miscibility of Blends of Poly (methyl methacrylate) and Epoxy Networks, Polymer, Vol. 41, 6375-6386 (2000).

[14] Mimura K., Ito.H., Fujioka. H., Improvement of Thermal and Mechanical Properties by Control of Morphologies in PES-Modified Epoxy Resins, Polymer, Vol. 41, 4451-4459 (2000).


[15] Sammani A.S. Nayef S. Al. M, Thermal Properties of Epoxy (DGEBA)/Phenolic Resin (NOVOLAC) Blends, The Arabian Journal for Science and Engineering, Vol. 35 (2010).

[16] Soo-Jin Park, Fan-Long Jin, Jae-Rock Lee, Thermal and mechanical Properties of Tetrafunctional Epoxy Resin Toughened with Epoxidised Soybean Oil, Materials Science and Engineering A, Vol. 374, 109-114 (2004).

[17] Radhakumary C., Prabha D.N., Suresh M., C.P. Reghunadhan Nair, Biopolymer Composite of Chitosan and Methyl Methacrylates for Medical Applications, Trends Biomaterial. Art of Organs, Vol. 18 (2) (2005).

[18] Metha R., Paradorn. N., Pranee. P., Preparation and Properties of Polydimethylsiloxane-modified Chitosan, Carbohydrate Polymers, Vol. 63, 229-237 (2006).


[19] Ming Kong, Xi Guang Chen, Ke Xing, Hyun Jin Park, Antimicrobial properties of chitosan and mode of action: A state of the art review, International Journal of Food Microbiology, 144(1), 51-63 (2010).