POLYPROPYLENE CHAIN STRUCTURE REGULATION BY ALKOXYSILANE AND ETHER TYPE EXTERNAL DONORS IN TICL"4/DIBP/MGCL"2-ALET"3 ZIEGLER-NATTA CATALYST
Junqin Lou; Tu, S; Fan, Z
| HERO ID | 1313019 |
|---|---|
| In Press | No |
| Year | 2010 |
| Title | POLYPROPYLENE CHAIN STRUCTURE REGULATION BY ALKOXYSILANE AND ETHER TYPE EXTERNAL DONORS IN TICL"4/DIBP/MGCL"2-ALET"3 ZIEGLER-NATTA CATALYST |
| Authors | Junqin Lou; Tu, S; Fan, Z |
| Journal | Iranian Polymer Journal |
| Volume | 19 |
| Issue | 12 (Dec 2010) |
| Page Numbers | 927-936 |
| Abstract | The effects of ethers alone and in combination with alkoxysilanes as external donors on propylene polymerisation carried out in the presence of a MgCl"2/TiCl"4/diisobutyl phthalate catalyst system were investigated. It was found that ethers alone did not improve the isotacticity of PP but a combination of the ethers with an alkoxysilane resulted in increased propylene polymerisation activity and isotacticity index but a decrease in melting temperature and melting enthalpy of polypropylene. An analysis of active centre distribution by deconvolution of the MWD curves showed that the ether/silane combinations increased the activity of the active centres and provided PP with medium molecular weight. 22 refs. |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | MOLECULAR WEIGHT DISTRIBUTION; POLYMERISATION CATALYSTS; MELTING TEMPERATURE; DECONVOLUTION; POLYMERIZATION MODIFIER; THERMOPLASTIC; TABLES; PP; GRAPH; PLASTIC; REACTIVITY; MWD; PROPYLENE POLYMER; THERMAL ANALYSIS; DSC; POLYPROPENE; SYNTHESIS; POLYPROPYLENE; POLYMERISATION MODIFIER; DIFFERENTIAL SCANNING CALORIMETRY; POLYMERIZATION CATALYSTS; CATALYST; DATA; INSTITUTION; POLYMERIZATION CATALYST; MELTING; TECHNICAL; MOLEC.WT.; INSTITUTE; ACTIVE CENTRE; POLYMERISATION CATALYST; ANALYSIS; ENTHALPY; DIFFERENTIAL THERMAL ANALYSIS; ISOTACTIC; PROPENE POLYMER; MOLECULAR MASS; MODIFIER; DTA; MOLECULAR WEIGHT |