摘要
以L-谷氨酸、L-丙氨酸为原料,利用硫酸催化-真空脱水制备了L-谷氨酸γ-苄酯(BLG);BLG和L -丙氨酸在四氢呋喃中分别与光气反应合成了L-谷氨酸γ-苄酯羧酸酐(BLG-NCA)和L-丙氨酸羧酸酐(Ala- NCA);BLG-NCA与ALa-NCA在三乙胺的引发下,共聚反应制得了BLG-NCA与ALa-NCA的共聚物。结果表明:合成BLG,BLG-NCA,ALa-NCA的产率分别为40．25％,88％,61．8％,熔程分别为171-173℃,91-93℃, 90-91℃。红外光谱也验证了所合成产物。BLG-NCA与ALa-NCA(摩尔比为8．194:1)的共聚产物在30℃下,其特性粘数为0．547 dL／g,核磁共振光谱确定了其结构特征,DSC分析证明了该共聚物为单一的共聚产物。
Using L -glutamie acid and L -alanine as raw materials, γ-benzyl-L-glutamate（BLG） was prepared by catalysis with sulfuric acid and dewatering under vacuum. BLG and L -alanine were used to react with phosgene in tetrahydrofuran solution, respectively, to synthesize N -carboxyanhydride of y -benzyl- L -glutamate（BLG-NCA） and N -carboxyanhydride of L -alaninc （ Ala- NCA） which were copolymerized with triethylamine as an initiator to produce the eopolymer of BLG-NCA and AIa-NCA. The results showed that the yield rates were 40.25%, 88%, 61.8% for BLG, BLG-NCA and Ala-NCA, respectively; and the melting ranges were 171 - 173℃, 91 -93℃ and 90 -91℃, respectively. The characteristics of the products were identified by infrared spectroscopy. The copolymer of BLG-NCA and Ala-NCA with molar ratio 8. 194 ： 1 exhibited intrinsic viscosity 0. 547 dL/g at 30℃. The copolymer was characterized by nuclear magnetic resonance spectroscopy. The DSC result proved that the copolymer should be the only resultant product.
出处
《合成纤维工业》
CAS
CSCD
北大核心
2006年第1期24-27,共4页
China Synthetic Fiber Industry
基金
江苏省教育厅基金(02KJB430005)
作者简介
姚凯（1978-），男，河南省人，硕士。从事高分子降解材料研究。
