Synthesis of Stereoblock Polypropylene by Change of Temperature in Living Polymerization
Macromolecular Research Volume 18 Issue 8
Page 737-741
published_at 2010
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| File | |
| Title ( eng ) |
Synthesis of Stereoblock Polypropylene by Change of Temperature in Living Polymerization
|
| Creator |
Cai Zhengguo
Nakayama Yuushou
|
| Source Title |
Macromolecular Research
|
| Volume | 18 |
| Issue | 8 |
| Start Page | 737 |
| End Page | 741 |
| Keywords |
stereoblock PP
living polymerization
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| Descriptions |
[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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| NDC |
Chemistry [ 430 ]
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| Language |
eng
|
| Resource Type | journal article |
| Publisher |
Springer
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| Date of Issued | 2010 |
| Rights |
Copyright (c) Springer 2010
|
| Publish Type | Author’s Original |
| Access Rights | open access |
| Source Identifier |
The original publication is available at www.springerlink.com
[DOI] 10.1007/s13233-010-0813-5
[ISSN] 1598-5032
[NCID] AA11831176
[DOI] http://dx.doi.org/10.1007/s13233-010-0813-5
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