RING-OPENING POLYMERIZATION OF ε-CAPROLACTONE BY LANTHANOCENE CATALYSIS*

SUN Junquan; PAN Zhida; Yang Shilin

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RING-OPENING POLYMERIZATION OF ε-CAPROLACTONE BY LANTHANOCENE CATALYSIS*

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- RING-OPENING POLYMERIZATION OF ε-CAPROLACTONE BY LANTHANOCENE CATALYSIS*
- Vol. 16, Issue 4, Pages: 297-303(1998)
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- Published：20 December 1998
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SUN Junquan, PAN Zhida, Yang Shilin. RING-OPENING POLYMERIZATION OF ε-CAPROLACTONE BY LANTHANOCENE CATALYSIS*[J]. 1998, 16(4): 297-303.
DOI：

SUN Junquan, PAN Zhida, Yang Shilin. RING-OPENING POLYMERIZATION OF ε-CAPROLACTONE BY LANTHANOCENE CATALYSIS*[J]. 1998, 16(4): 297-303. DOI：

摘要

Ring-opening polymerization of ε-caprolactone (CL) catalyzed bylanthanocenes

O(C2H4C5H3CH3)22YCl (Cat-YCl) and Me2Si[(CH3)3SiC5H3]2NdCl(Cat-NdCl) has been carried out for the first time. It has been found that both yttroceneand neodymocene are very efficient to catalyze the polymerization of CL

giving high molec-ular weight poly (ε-caprolactone) (PCL ). The effects of [cat] / [ε- CL] molar ratio

polymeriza-tion temperature and time

as well as solvents were investigated and polymerization temperature is found to be the most important factor affecting the polymerization.The bulk polymerization gives higher molecular weight PCL and higher conversion than that in solution polymerization.NaBPh4 was found to promote the polymerization of ε-caprolactone

and thus yo increase both the polymerization conversion and MW of poly(ε-caprolactone).

Abstract

Ring-opening polymerization of ε-caprolactone (CL) catalyzed bylanthanocenes

giving high molec-ular weight poly (ε-caprolactone) (PCL ). The effects of [cat] / [ε- CL] molar ratio

polymeriza-tion temperature and time

and thus yo increase both the polymerization conversion and MW of poly(ε-caprolactone).

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