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 ap...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.展开更多
制备了新型综合性能优于间规聚苯乙烯 (s PS) /聚对苯二甲酸乙二醇酯 (PET)的 s PS/PET/磺化间规聚苯乙烯钾盐离聚体 (Ss PS- K)工程塑料合金。当 s PS/PET/Ss PS- K为 85 /15 /4时 ,合金的冲击强度最大为 11.5 k J/m2 ,是纯 s PS的 3...制备了新型综合性能优于间规聚苯乙烯 (s PS) /聚对苯二甲酸乙二醇酯 (PET)的 s PS/PET/磺化间规聚苯乙烯钾盐离聚体 (Ss PS- K)工程塑料合金。当 s PS/PET/Ss PS- K为 85 /15 /4时 ,合金的冲击强度最大为 11.5 k J/m2 ,是纯 s PS的 3倍 ,且拉伸强度和弯曲强度依旧较高 ,耐热性较好。DSC分析表明 s PS和PET的熔点几乎不受 Ss PS- K用量的影响 ,分别接近各自的纯料 ,而起始结晶温度和达到最大结晶速率时的温度均提高。另外 ,PET的结晶速率显著提高。SEM观察到加入 Ss PS- K后 ,PET分散相的尺寸减小 ,且随其用量的增加 。展开更多
文摘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.
