Carboxymethylation of wheat starch and &-cyclodextrin followed by ultrasonic treatment of carboxymethyl wheat starch afforded starch derivatives differing in molecular size. Their degree of substitution was estimated to be 0.6. Starch materials were further sulfated to give hybrid derivatives with carboxymethyl and sulfate groups. A series of wheat starch and &-cyclodextrin derivatives were characterized by FT-IR spectroscopy and thermogravimetric analysis. Thermal analysis of starch and their derivatives revealed information concerning their thermal stability and decomposition. It has been found that carboxymethylation and sulfation decrease the thermal stability of starch materials. Similarly, their hybrid carboxymethyl-sulfate derivatives showed the same effect. Further, it has been found that the thermal stability of cyclic molecules was higher in comparison with linear ones.
PerkinsATMitchellHL. Differential thermal analysis of organic compounds. Trans Kansas Acad Sci.1957; 60: 437.
BelopolskayaTVTsereteliGIGruninaNASmirnovaOI. Calorimetric study of the native and postdenatured structures in starches with different degree of hydration. J Therm Anal Cal.2008; 92(3): 677–82http://dx.doi.org/10.1007/s10973-008-9013-3.)| false
TomasikPPalaasinkiMWiejakS. The thermal decomposition of carbohydrates. Part II. The decomposition of starch. Adv Carbohydr Chem Biochem.1989; 47: 279–87http://dx.doi.org/10.1016/S0065-2318(08)60416-3.)| false
ThiebaudSAburtoJAlricIBorredonEBikarisDPrinosJ, et al. Properties of fatty-acid esters of starch and their blends with LDPE. J Appl Polym Sci.1997; 65: 705–21http://dx.doi.org/10.1002/(SICI)1097-4628(19970725)65:4&3C705::AID-APP9&3E3.0.CO;2-O.)| false
AburtoJAlricIThiebaudSBorredonEBikarisDPrinosJ, et al. Synthesis, characterization, and biodegradability of fatty-acid esters of amylose and starch. J Appl Polym Sci.1999; 74: 1440–51http://dx.doi.org/10.1002/(SICI)1097-4628(19991107)74:6&3C1440::AID-APP17&3E3.0.CO;2-V.)| false
FangJMFowlerPATomkinsonJHillCAS. The preparation and characterization of a series of chemically modified potato starches. Carbohydr Polym.2002; 47: 245–52http://dx.doi.org/10.1016/S0144-8617(01)00187-4.)| false
HeinzeTTalabaPHeinzeU. Starch derivatives of high degree of functionalization. 1. Effective, homogeneous synthesis of p-toluenesulfonyl (tosyl) starch with a new functionalization pattern. Carbohydr Polym.2000; 42: 411–20.
HeinzeTTalabaPHeinzeU. Starch derivatives of high degree of functionalization. 1. Effective, homogeneous synthesis of p-toluenesulfonyl (tosyl) starch with a new functionalization pattern. Carbohydr Polym.2000; 42: 411–20http://dx.doi.org/10.1016/S0144-8617(99)00182-4.)| false
MaXChangPRYuJ. Properties of biodegradable thermoplastic pea starch/carboxymethyl cellulose and pea starch/microcrystalline cellulose composites. Carbohydr Polym.2008; 72: 369–75http://dx.doi.org/10.1016/j.carbpol.2007.09.002.)| false