Full Text:   <1231>

CLC number: O632.52

On-line Access: 

Received: 1999-04-30

Revision Accepted: 1999-09-15

Crosschecked: 0000-00-00

Cited: 17

Clicked: 3722

Citations:  Bibtex RefMan EndNote GB/T7714

-   Go to

Article info.
1. Reference List
Open peer comments

Journal of Zhejiang University SCIENCE A 2000 Vol.1 No.2 P.157-161

http://doi.org/10.1631/jzus.2000.0157


THE POLYMERIZATION OF METHYL METHACRYLATE WITH A NEW TIN-BRIDGED YTTROCENE/Al(i-Bu)3


Author(s):  HU Wei-qiu, SUN Jun-quan, PAN Zhi-da, WU Zhao-li, XU Yu-ming

Affiliation(s):  Dept.of Chemical Engineering, Yuquan Campus of Zhejiang University,Hangzhou 310027, China; more

Corresponding email(s): 

Key Words:  rare earth catalyst, yttrocene, heteronuclear metallocene, polymerization, methyl methacrylate, kinetics, lanthanocene


Share this article to: More

HU Wei-qiu, SUN Jun-quan, PAN Zhi-da, WU Zhao-li, XU Yu-ming. THE POLYMERIZATION OF METHYL METHACRYLATE WITH A NEW TIN-BRIDGED YTTROCENE/Al(i-Bu)3[J]. Journal of Zhejiang University Science A, 2000, 1(2): 157-161.

@article{title="THE POLYMERIZATION OF METHYL METHACRYLATE WITH A NEW TIN-BRIDGED YTTROCENE/Al(i-Bu)3",
author="HU Wei-qiu, SUN Jun-quan, PAN Zhi-da, WU Zhao-li, XU Yu-ming",
journal="Journal of Zhejiang University Science A",
volume="1",
number="2",
pages="157-161",
year="2000",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2000.0157"
}

%0 Journal Article
%T THE POLYMERIZATION OF METHYL METHACRYLATE WITH A NEW TIN-BRIDGED YTTROCENE/Al(i-Bu)3
%A HU Wei-qiu
%A SUN Jun-quan
%A PAN Zhi-da
%A WU Zhao-li
%A XU Yu-ming
%J Journal of Zhejiang University SCIENCE A
%V 1
%N 2
%P 157-161
%@ 1869-1951
%D 2000
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2000.0157

TY - JOUR
T1 - THE POLYMERIZATION OF METHYL METHACRYLATE WITH A NEW TIN-BRIDGED YTTROCENE/Al(i-Bu)3
A1 - HU Wei-qiu
A1 - SUN Jun-quan
A1 - PAN Zhi-da
A1 - WU Zhao-li
A1 - XU Yu-ming
J0 - Journal of Zhejiang University Science A
VL - 1
IS - 2
SP - 157
EP - 161
%@ 1869-1951
Y1 - 2000
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2000.0157


Abstract: 
A new catalyst composed of Tin-bridged yttrocene Ph2Sn(MeCp)2YCl (MeCp=methylcyclopentadienyl) and Al(i-Bu)3 was successfully developed for the polymerization of methyl methacrylate(MMA). Detailed study of factors (such as the molar ratio of Al/Cat., catalyst concentration, various solvents, temperature and time) influencing polymerization reaction indicated that the catalytic active species may be still somewhat stable at high temperature and still have a long catalytic lifetime. 1H NMR spectrum showed about 65% syndiotactic content in the polymethyl methacrylate(PMMA) prepared. From kinetic studies, the polymerization rate equation may be expressed as Rp=Kp[Cat.]2.4. The overall activation energy of polymerization is 20.9±3.1 kJ/mol.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1]Chen, S.S., Zhang, Z.Z., Wang, X.K., et al., 1986. Handbook of organometallic compounds synthesis. Chemical Industry Press, Beijing, p.124-139,292-297.

[2]Herrmann, W.A., Morawietz, J.A., Herrmann, H.F., et al., 1996. Tin-bridged ansa-metallocenes of zirconium: synthesis and catalytic performance in olefin polymerization. Journal of Organometallic Chemistry, 509:115.

[3]Kaminsky, W., 1998. Highly active metallocene catalysts for olefin polymerization. J. Chem. Soc., Dalton Trans., 1413-1418.

[4]Liu, J.F., Shen, Z.Q., Sun, J.Q., 1996. Polymerization of mehtyl methacrylate with a homogenous neodymium catalyst: Nd(naph)3-BuLi. Eur. Polym. J., 32(7): 883.

[5]Odian, J., 1981, Principles of Polymerization. 2nd.ed., John Wiley&Sons Inc., New York, p.272.

[6]Sun, J.Q., 1997a. The polymerization of methyl methacrylate with a new Nd(O-i-Pr)-Al(i-Bu)3 catalyst system. Chemical Research in Chinese Univ., 13(4):344.

[7]Sun, J.Q., Pan, Z.D., 1997b. Polymerization of methyl methacrylate with novel Ln(acac)3-n-BuMgCl. Chinese J. of Appl. Chem, 14(2):1.

[8]Sun, J.Q., Pan, Z.D., 1998. Ring-openning polymerization of ε-caprolactone by lanthanocene catalysis. Chinese J. Of Polymer Sci., 16(4): 297.

[9]Yasuda, H., 1993. Characteristics of rare earth systems as polymerization initiators. Prog.Polym.Sci., 18:1097.

[10]Zheng, C.R., 1980, Molecular weight and molecular weight distribution of polymers. Chem.Ind. Press, Beijing, p.604.

Open peer comments: Debate/Discuss/Question/Opinion

<1>

Please provide your name, email address and a comment





Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou 310027, China
Tel: +86-571-87952783; E-mail: cjzhang@zju.edu.cn
Copyright © 2000 - Journal of Zhejiang University-SCIENCE