Strontium-based initiator system for ring-opening polymerization of cyclic esters

	Strontium-based initiator system for ring-opening polymerization of cyclic esters
	Tang ZH ; Chen XS ; Hang QZ ; Bian XC ; Yang LX ; Piao LH ; Jing XB
刊名	journal of polymer science part a-polymer chemistry
	2003
卷号	41 期号:13 页码:1934-1941
关键词	EPSILON-CAPROLACTONE ANIONIC-POLYMERIZATION COORDINATION POLYMERIZATION CATIONIC POLYMERIZATION BLOCK-COPOLYMERS MOLECULAR-WEIGHT LACTIDE POLYLACTONES MECHANISM D L-LACTIDE
ISSN号	0887-624x
通讯作者	chen xs
中文摘要	an amino isopropoxyl strontium (sr-po) initiator, which was prepared by the reaction of propylene oxide with liquid strontium ammoniate solution, was used to carry out the ring-opening polymerization (rop) of cyclic esters to obtain aliphatic polyesters, such as poly(epsilon-caprolactone) (pcl) and poly(l-lactide) (plla). the sr-po initiator demonstrated an effective initiating activity for the rop of epsilon-caprolactone (epsilon-cl) and l-lactide (lla) under mild conditions and adjusted the molecular weight by the ratio of monomer to sr-po initiator. block copolymer pcl-b-plla was prepared by sequential polymerization of epsilon-cl and lla, which was demonstrated by h-1 nmr, c-13 nmr, and gel permeation chromatography. the chemical structure of sr-po initiator was confirmed by elemental analysis of sr and n, h-1 nmr analysis of the end groups in epsilon-cl oligomer, and fourier transform infrared (ftir) spectroscopy. the end groups of pcl were hydroxyl and isopropoxycarbonyl, and ftir spectroscopy showed the coordination between sr-po initiator and model monomer gamma-butyrolactone. these experimental facts indicated that the rop of cyclic esters followed a coordination-insertion mechanism, and cyclic esters exclusively inserted into the sr-o bond.
收录类别	SCI
语种	英语
WOS记录号	WOS:000183564300007
公开日期	2010-09-13
内容类型	期刊论文
源URL	[http://202.98.16.49/handle/322003/17937]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Tang ZH,Chen XS,Hang QZ,et al. Strontium-based initiator system for ring-opening polymerization of cyclic esters[J]. journal of polymer science part a-polymer chemistry,2003,41(13):1934-1941.
APA	Tang ZH.,Chen XS.,Hang QZ.,Bian XC.,Yang LX.,...&Jing XB.(2003).Strontium-based initiator system for ring-opening polymerization of cyclic esters.journal of polymer science part a-polymer chemistry,41(13),1934-1941.
MLA	Tang ZH,et al."Strontium-based initiator system for ring-opening polymerization of cyclic esters".journal of polymer science part a-polymer chemistry 41.13(2003):1934-1941.