[2E06-2E07] Polymer, oligomer (2)

[2E06] Relationship between molecular structure of internal donors and catalytic performance: Impact of alkyl groups of phthalates

○Mostafa Khoshsefat^1,2, Patchanee Chammingkwan ^1,2, Minoru Terano^1,2, Toshiaki Taniike^1,2 (1. Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 2. DPI)

Keywords:Phthalate-based Ziegler-Natta Catalyst, Molecular structure of internal donor , Polypropylene

Herein, we investigated the effect of alkyl groups (R: –nBu, -iBu, -nPr, -iPr, -Et and –Me) of phthalate-based internal donors (IDs) in a series of Ziegler-Natta catalysts. The alkyl groups of IDs not only showed high impact on the chemical composition (Ti, -OEt and ID contents) and side-reactions but also the pore characteristics were affected by the size of these groups. Moreover, an inverse relationship was observed between the alkyl size and ID contents. This side reaction, besides, was significant in terms of the catalyst performance and stereoregularity of the PP samples.