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- Title
A Comprehensive Review on Controlled Synthesis of Long-Chain-Branched Polyolefins: Part 2, Multiple Catalyst Systems and Prepolymer Modification.
- Authors
Liu, Weifeng; Liu, Pingwei; Wang, Wen‐Jun; Li, Bo‐Geng; Zhu, Shiping
- Abstract
Long-chain branching plays an important role in the performance of polyolefins (POs). The existence of a very small amount of long-chain branches (LCBs), i.e., <1 per 10 000 carbons, can significantly improve processability of the polyolefin materials, which is highly desired for those intractable polyolefins with narrow molecular weight distribution and high degree of crystallinity. Numerous literatures have been published on the controlled synthesis of long-chain-branched POs. In the previous paper, the major literatures of single catalyst systems have been summarized. This paper provides a comprehensive review for the binary and multiple catalyst systems and a brief summary of some other methods for the controlled synthesis of long-chain-branched POs. The controllability of long-chain-branched structures in the various preparation procedures with single or two reactor systems, and in one or two-step processes, is analyzed and compared in-depth.
- Subjects
POLYOLEFIN synthesis; PREPOLYMERS; CHAIN length (Chemistry); MOLECULAR weights; CHAIN-propagating reactions; COUPLING reactions (Chemistry)
- Publication
Macromolecular Reaction Engineering, 2016, Vol 10, Issue 3, p180
- ISSN
1862-832X
- Publication type
Article
- DOI
10.1002/mren.201500054