顺丁烯二酸酐-桐油-松香甘油酯的合成及性能研究

Study on synthesis and properties of maleic anhydride-tung oil-ester gum

为提高EG（松香甘油酯）的帆（重均相对分子质量）和柔韧性，以MAH（顺丁烯二酸酐）、TO（桐油）和松香为主要原料，合成了MAH—TO-松香的Diels—Aider加成物；然后用甘油对该加成物进行酯化改性，制得MR（MAH—TO—EG的Diels—Alder加成物）。考察了MAH、TO比例对MR的Mn及其分布、软化点、MR／亚麻油溶液的黏度和正庚烷容纳度等影响。结果表明：采用单因素试验法优选出制备MR的最佳工艺条件为n（MAH）：n（松香）=2：10、m（TO）：m（松香）=（1～2）：10；此时MR的综合性能相对较好，其帆和软化点较高，并且MR／亚麻油溶液的黏度和正庚烷容纳度也相对较大，完全满足胶粘剂、涂料的制备要求。

In order to improve Mn（weight average molecular weight） and flexibility of EG（ester gum）,with MAH（maleic anhydride）,TO （tung oil） and rosin as main raw materials,a Diels-Alder adduct based on MAH-TO- rosin was synthesized. Then,a MR（Diels-Alder adduct based on MAH-TO-EG） was prepared when the adduct was esterified and modified by glycerol. The influences of MAH and TO proportion on the M~ and its distribution of MR,the softening points of MR＇,the viscosity and n-heptane contain degree of MR/linseed oil solution were investigated. The results showed that the optimal process conditions of preparing MR were preferred by single- factor experiment when molar ratio of n （MAH）：n （rosin） was 2：10, and mass ratio of m （TO） ：m （rosin） was （1-2）： 10. Here, the MR had the relatively better combination property, and it could meet requirements of preparing adhesives and coating because its Mw and softening point were relatively higher,and the viscosity and n-heptane contain degree of MR/linseed oil solution were relatively larger.