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T. Kean, S. Roth and M. Thanou, “Trimethylated Chitosans as Non-Viral Gene Delivery Vectors: Cytotoxicity and Transfection Effi-ciency,” Journal of Controlled Release, Vol. 103, No. 3, 2005, pp. 643-653. doi:10.1016/j.jconrel.2005.01.001

has been cited by the following article:

• TITLE: Thermal Stability and Degradation of Chitosan Modified by Cinnamic Acid

  AUTHORS: Mostafa Amin Diab, Adel Zak El-Sonbati, Mohamed Mohamed Al-Halawany, Dina Mohamed Diaa Bader

  KEYWORDS: N-Cinnamoyl Chitosan Preparation; Thermal Stability and Degradation; Mechanism of Degradation

  JOURNAL NAME: Open Journal of Polymer Chemistry, Vol.2 No.1, February 28, 2012

  ABSTRACT: The reaction of chitosan with cinnamic acid gave the corresponding N-cinnamoyl chitosan (NCC) polymer. The chem-ical structure of the modified polymer was characterized by IR, 1H-NMR and elemental analysis. Thermogravim- etric analysis reveals that the thermal stability of chitosan polymer is greater than NCC polymer. The activation energies of thermal degradation of chitosan and NCC polymers were determined using Arrhenius relationship. Thermal degradation of NCC polymer was studied and the products of degradation were identified by GC-MS technique. It seems that the mechanism of degradation of NCC polymer is characterized by elimination of low-molecular weight radicals. Combination of these radicals and random scission mechanism along the backbone chain are the main source of the degradation products.