脂肪族C4取代1,3,5-苯三甲酰胺的合成及对聚丙烯结晶熔融行为的影响

Synthesis of Aliphatic C4 Substituted 1,3,5-Benzenictrisamides and Effects on Crystallization and Melting Behaviors of Polypropylene

合成了1,3,5-苯三甲酰三(叔丁胺)(BTA-TB),1,3,5-苯三甲酰三(异丁胺)(BTA-IB)和1,3,5-苯三甲酰三(正丁胺)(BTA-NB)成核剂,并研究了其对聚丙烯结晶和熔融行为的影响。与高效商用环状二羧酸盐类聚丙烯成核剂HPN-68对比,结果表明,这三种成核剂均为高效的聚丙烯α晶型成核剂,最适添加量分别为0.25%,0.15%和0.25%,最适添加量下BTA-TB、BTA-IB和BTA-NB使聚丙烯结晶温度从124℃分别提升至130.4、130.1和130.2℃,与HPN-68在添加量0.25%下的成核效果相当。

1, 3, 5-benzenetriearboxylic acid tris （tert-butylamide） （BTA-TB）, 1, 3, 5- benzenetricarboxylic acid tris （sec-butylamide） （BTA-IB） and 1, 3, 5-benzenetricarboxylic acid tris （butylamide） （BTA-NB） were prepared as nucleating agents for polypropylene （PP）, and the effects of the obtained nucleating agents on the crystallization and melting behaviors of PP were investigated by using differential scanning calorimetry （DSC）. The properties of PP nucleated with BTA-TB, BTA-IB and BTA- NB were compared with those of PP nucleated with highly efficient commercial nucleating agent HPN-68. The results show that BTA-TB, BTA-IB and BTA-NB are highly efficient nucleating agents for a-form PP compared with HPN-68. The optimal addition amount of BTA-TB, BTA-IB and BTA-NB in PP is 0. 25wt%, 0. 15wt%and 0. 25wt%, respectively. Under the optimal addition amount, the incorporation of BTA-TB, BTA-IB and BTA-NB into PP increases the crystallization peak temperature from 124 ℃ of pure PP to 130. 4 ℃, 130. 1 ℃ and 130. 2 ℃, respectively, which is close to the nucleating effect of HPN-68 at addition amount of 0.25wt%.