摘要
以丙烯酸松香(β-丙烯酰氧基乙基)酯(AR-2-HEA)为原料,偶氮二异丁腈(AIBN)为引发剂,研究AR-2-HEA本体聚合的动力学关系。结果表明,随着AIBN用量的增加,反应焓变逐步上升。在非等温条件下,在相同引发剂用量下,不同的升温速率,焓变基本相同。n级反应法的动力学方程为:dα/dt=5.58×1013×exp(-103.1×103/RT)(1-α)0.941;在等温条件下,相同引发剂用量不同温度本体聚合的聚合反应焓变基本相同,随着聚合温度的提高,聚合反应速率得到较大提高,聚合反应的动力学方程为:dα/dt=1.48×1014×exp(-105.9×103/RT)(1-α)1.05。由上述动力学方程模拟的等温聚合反应程度与时间的关系曲线与实际情况基本吻合。
Kinetics of bulk polymerization of acrylic rosin （β--acryloxyl ethyl） ester （AR-2-HEA） in the presence of initiator AIBN was studied by using non-isothermal and isothermal differential scanning calorimeter （DSC）. The results showed that the delta enthalpy increase gradually with increasing the amount of AIBN. In the non-isothermal condition： The rate of heating had no significant effect on delta enthalpy in the constant dosage of initiator. By using nth-order kinetics, the resulted dynamic equations of polymerization of AR-2-EHA was da/dt = 5.58 × 10^13 × exp （ - 103.1 × 10^3/RT） （ 1 - α）^0.941. In the isothermal condition： the results showed that the temperature had no significant effect on the enthalpy of polymerization and the velocity of polymerization increased with increasing temperature. The dynamic equation of polymerization of AR-2-EHA was da/dt = 1.48 × 10^14 × exp （ - 105.9× 10^3/RT）（ 1 - α ）^1.05 . The relationships between reaction degree and time deduced by these two equations were almost the same as the real data.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2009年第3期105-110,共6页
Scientia Silvae Sinicae
基金
国家杰出青年科学基金资助项目(30325031)
