L-aspartic acid has been used as raw material and polyaspartic acid has been synthesized by 3 methods: pyrocondensation polymerization,liquid phase polymerization and modification polymerization.

• 以L-天冬氨酸为原料,采用热缩聚合、液相聚合和改性聚合三种方法合成了热缩聚天冬氨酸。