Citation:
	            
		            Shao  Zhengzhong, Zhou  Linyuan, Yu  Tongyin. THERMAL POLYMERIZATION OF N-CARBOXYL-L-ALANINE ANHYDRIDE[J]. Chinese Journal of Applied Chemistry,
							;1992, 9(2): 79-82.
						
				
					 
				
	        
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	                	High molecular weight poly L-alanine(PL-ALa) was prepared by thermal ring-opening polymerization of L-alanine-N-carboxyl anhydride. The influence of solvent, reaction temperature and monomer concentration on the polymerzation rate and the molecular weight of PL-Ala has been studied. It was found that the rate of polymerization and the molecular weight of PL-Ala have a maximum value at about 70℃ in different reaction systems.
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