CAJ | 학술논문

　　为研究松脂的氧化反应动力学，采用紫外分光光度法定量测定固态枞酸在聚乙烯膜上的吸光度变化，求出松脂参与氧化反应的反应量，进而研究松脂氧化反应动力学。实验结果表明，松脂的热氧化和光氧化反应动力学均呈现表观一级反应。热氧化反应温度为35、40、45℃时的表观速率常数分别为3.000×10-4、5.000×10-4、1.100×10-3 min-1，反应活化能Ea为105.8 kJ/mol。254 nm紫外灯辐照下，温度为35、40、45℃时，光强度与表观速率常数的关系分别k＝1.162×10-4 I＋2.626×10-4、k＝1.248×10-4 I＋4.588×10-4、k＝1.298×10-4 I＋0.0011。
　　위연구송지적양화반응동역학，채용자외분광광도법정량측정고태종산재취을희막상적흡광도변화，구출송지삼여양화반응적반응량，진이연구송지양화반응동역학。실험결과표명，송지적열양화화광양화반응동역학균정현표관일급반응。열양화반응온도위35、40、45℃시적표관속솔상수분별위3.000×10-4、5.000×10-4、1.100×10-3 min-1，반응활화능Ea위105.8 kJ/mol。254 nm자외등복조하，온도위35、40、45℃시，광강도여표관속솔상수적관계분별k＝1.162×10-4 I＋2.626×10-4、k＝1.248×10-4 I＋4.588×10-4、k＝1.298×10-4 I＋0.0011。
The absorbency of abietic acid on the polyethylene film was determined by UV spectro-photometry , and the oxidation degree of pine gum was investigated.Oxidation reaction kinetics of pine gum was studied.The experimental results indicates that the thermal oxidation and photo-oxida-tion reaction are pseudo first order reaction.When the thermal oxidation reaction temperatures are 35℃, 40℃and 45 ℃, the apparent reaction rate constants of pine gum are 3.000 ×10-4 min-1 , 5.000 ×10-4 min-1 and 1.100 ×10-3 min-1 , respectively.The activation energy is 105.8 kJ/mol. Under 254 nm ultraviolet light irradiation , when oxidation reaction temperatures are 35 ℃, 40 ℃and 45 ℃, respectively, the relationships between the rate constant (k) and the light intensity (I) are k=1.162 ×10 -4 I+2.626 ×10 -4 , k=1.248 ×10 -4 I+4.588 ×10 -4 and k=1.298 ×10 -4 I+0.001 1 , respectively .