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The effect of different sulfonation degree on properties of sulfonated syndiotactic polystyrene(S s PS) was investigated by 1H NMR, 13 C NMR,FTIR,DSC and WAXD.The results of 13 C NMR showed that a peak at δ =145 5 appeared in all S s PS spectra,which proved that the syndiotactic structure of syndiotactic polystyrene( s PS) still existed in S s PS.With increasing degree of sulfonition,the chemical shifts of C 1 and C|3 for sulfonated benzene ring turned out to be wider. 1 H NMR spectra showed that C|3 for sulfonated benzene ring had a chemical shift of 7 66.FTIR spectra showed that sulfonic acid groups were introduced on the para position of benzene rings and with increasing sulfonation degree,the absorption strength of 612/1600 cm 1 ,834/1600cm -1 increased,but the absorption strength of 1078/1600cm -1 decreased.The absorption of ～1030cm -1 ,～1179cm -1 ,～1217cm -1 appeared when the sulfonation degree was higher that 6%. s PS and S s PS H 2 2 had absorption at 975 and 943cm -1 and also had double peaks around ～1175cm -1 ;DSC showed that with increasing sulfonation degree, the glass transition temperature increased, the melt temperature,crystallization temperature and crystallization degree decreased;S s PS couldn’t crystallize when sulfonation degree was higher that 6mol%;WAXD proved that s PS had the α and β crystal types, however,S s PS with 2 2% sulfonation degree only had the β crystal type, and S s PS with 6 1% sulfonation degree didn’t crystallize.
The effect of different sulfonation degree on properties of sulfonated syndiotactic polystyrene (SS PS) was investigated by 1H NMR, 13 C NMR, FTIR, DSC and WAXD.The results of 13 C NMR showed that a peak at δ = 145 5 appeared in all Ss PS spectra, which demonstrated that the syndiotactic structure of syndiotactic polystyrene (PSPS) still existed in PSPS. With increasing degree of sulfonition, the chemical shifts of C 1 and C | 3 for sulfonated benzene ring turned out 1 H NMR spectra showed that C | 3 for sulfonated benzene ring had a chemical shift of 7 66. FTIR spectra showed that sulfonic acid groups were introduced on the para position of benzene rings and with increasing sulfonation degree, the absorption strength of 612/1600 cm 1, 834/1600 cm -1 increased, but the absorption strength of 1078/1600 cm -1 decreased. The absorption of ~ 1030 cm -1, ~ 1179 cm -1, ~ 1217 cm -1 occurred when the sulfonation degr ee was higher that 6%. s PS and s PSH 2 2 had absorption at 975 and 943 cm -1 and also had double double around ~ 1175 cm -1; DSC showed that with increasing sulfonation degree, the glass transition temperature increased, the melt temperature, crystallization temperature and crystallization degree decreased; S s PS could not crystallize when sulfonation degree was higher that 6 mol%; WAXD proved that s PS had the α and β crystal types, however, s s PS with 2 2% sulfonation degree only had the β crystal type, and PS PS with 6 1% sulfonation degree did not crystallize.