摘要
在超临界CO2条件下由双酚A和碳酸二苯酯合成了双酚A型聚碳酸酯(PC),用红外光谱(FT-IR)、核磁共振谱(1H-NMR)、凝胶渗透色谱(GPC)和差示扫描量热法(DSC)表征了PC的结构和性质。结果表明反应过程中存在线形缩聚和成环两种反应机理,产物的重均分子量高达117740,分子量分布指数Pd=1.33;超临界CO2能增塑PC致使链段活动性增强,玻璃化转变温度(Tg)降低。
A specific GC analysis method was established for the rapid quantification of the main products of liquid-phase oxidation of toluene, namely, benzaldehyde, benzyl alcohol and benzoic acid. A C,-C equipped with a FFAP capillary and a FID detector was adopted. O-nitrotoluene and dimethylphthalate were used as internal standards of benzaldehyde, benzyl alcohol and benzoic acid respectively. The results indicated that the mean recovery rate for spiked samples are 105.39%, 101.94 % ,97.18%, respectively, and the standard deviations are 3.19 %, 3.71%, 1.66 %, respectively.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2007年第1期31-34,共4页
Natural Gas Chemical Industry
基金
国家自然科学基金资助项目(20076036)
武汉工程大学湖北省新型反应器与绿色化学工艺重点实验室开放基金资助项目(200400604)
