986 V.Sharma.P.P.Kundu/Prog.Polym.Sci.31(2006)983-1008 8 入入⑧入入 2.b t9e80ne。一 available in bulk;specification of soybean oils used various polymers. Cationic copolymerization of Larock group are reportec in regular soybean oil,low n o a trigly e struc. soybe The H NMR shown in Fig These makes them ideal monomers for the preparation of analysis (DMA).thermogravimetric analysisavailable in bulk; specification of soybean oils used by the Larock group are reported in Table 2. Natural soybean oil possesses a triglyceride struc￾ture with highly unsaturated fatty acid side chains. The 1 H NMR spectra of some example oils are shown in Fig. 3. The unsaturation in these oils makes them ideal monomers for the preparation of various polymers. Cationic copolymerization of regular soybean oil, low saturated soybean oil or conjugated low saturated soybean oil with styrene and divinylbenzene leads to various copolymers. These copolymers have been characterized by various techniques, including dynamic mechanical analysis (DMA), thermogravimetric analysis ARTICLE IN PRESS Scheme 2. The modification of acrylated epoxidized soybean oil (AESO) shown using cyclohexane dicarboxylic anhydride or maleic anhydride. These AESOs were cured with styrene or other comonomers. Reprinted with the permission from J Appl Polym Sci 2001; 82: 707 r John Wiley and Sons, Inc. [1]. 986 V. Sharma, P.P. Kundu / Prog. Polym. Sci. 31 (2006) 983–1008