Citation: MA Zhi-Hua. POLYMERIZATION OF 1-OCTENE AND DETERMINATION OF MARK-HOUWINK CONSTANTS OF POLY(1-OCTENE)[J]. Chinese Journal of Polymer Science, ;2011, 29(5): 560-568. doi: 10.1007/s10118-011-1069-z shu

POLYMERIZATION OF 1-OCTENE AND DETERMINATION OF MARK-HOUWINK CONSTANTS OF POLY(1-OCTENE)

MA Zhi-Hua

Received Date: 28 August 2010
Revised Date: 3 November 2010

Fund Project: This work was supported by the program for new century excellent talents in Chinese universities and Beijing Municipal Education Commission.

The polymerization of 1-octene initiated by methylalumoxane (MAO)-activated Ni(II)-based--diimine complexes [(2,6-i-Pr)2C6H3-DAB(An)]NiBr2 was investigated. Using this catalyst, poly(1-octene)s with molecular weight between 100 103 and 400 103 and polydispersity (Mw/Mn) between 1.3 and 1.5 were synthesized successfully by varying reaction time at room temperature. The poly(1-octene)s were amorphous polymers and could be well soluble in tetrahydrofuran (THF). After fractional precipitation, poly(1-octene)s with narrow molecular weight distributions (Mw/Mn 1.12) were obtained. Their weight-average molecular weights were measured by gel permeation chromatography (GPC) in conjunction with online model BI-MwA multiangle laser light scattering (MALLS), and their intrinsic viscosities were measured by Marons single-point method. The k and values in Mark-Houwink equation [] = KM in THF at 40℃ were 0.089 mL/g and 0.61 respectively.
- Nickel(-diimine) catalyst,
- Poly(1-octene),
- Mark-Houwink constants
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