Synthesis of Stereoblock Polypropylene by Change of Temperature in Living Polymerization
Use this link to cite this item : https://ir.lib.hiroshima-u.ac.jp/00030775
ID | 30775 |
file | |
creator |
Cai, Zhengguo
Nakayama, Yuushou
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subject | stereoblock PP
living polymerization
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NDC |
Chemistry
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description | [t-BuNSiMe2(3,6-t-Bu(2)Flu)]TiMe2 (1) combined with trialkylaluminum-free modified methylaluminoxane (dMMAO) was used to induce the living polymerization of propylene in toluene at -20, 0, and 25 degrees C with control of the syndiospecificity. After the first polymerization at -20 degrees C, the same amounts of propylene were added at 25 degrees C for the second polymerization. The resulting PP was syndiotactic-rich (rr = 0.75), the value of which is the arithmetical average ((0.89 + 0.60)/2 = 0.745) of those produced at -20 and 25 degrees C. These results indicate the formation of the expected syndiotactic-atactic di-stereoblock PP.
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journal title |
Macromolecular Research
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volume | Volume 18
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issue | Issue 8
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start page | 737
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end page | 741
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date of issued | 2010
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publisher | Springer
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issn | 1598-5032
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ncid | |
publisher doi | |
language |
eng
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nii type |
Journal Article
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HU type |
Journal Articles
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DCMI type | text
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format | application/pdf
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text version | author
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rights | Copyright (c) Springer 2010
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relation | The original publication is available at www.springerlink.com
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relation url | |
department |
Graduate School of Engineering
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