Tandem coordinative chain transfer polymerization for long chain branched Polyethylene: The role of chain displacement

A Dashti, M Ahmadi, V Haddadi-Asl, S Ahmadjo… - European Polymer …, 2023 - Elsevier
The controlled introduction of long chain branches (LCBs) in the commonly linear structure
of polyolefins has been frequently pursued by researchers to improve their melt …

Hafnium and Zirconium Complexes Bearing SNN-Ligands Enhancing Catalytic Performances toward Ethylene/1-Octene Copolymerization

Y Chen, S Zhou, W Yang, S Liu - Organometallics, 2022 - ACS Publications
The development of efficient catalysts is an ongoing pursuit in the field of olefin
polymerization in order to synthesize desired polyolefins and to advance the present …

Synthesis of long-chain branched polyolefins by coordinative chain transfer polymerization

HJ Lee, JW Baek, TJ Kim, HS Park, SH Moon… - …, 2019 - ACS Publications
Synthesis of long-chain branched polymers has been a crucial concern in the polyolefin
industry. In this study, a method to produce long-chain branches (LCBs) in coordinative …

Quantitative polymer characterizations with NMR cryoprobes through spin echo NMR pulse sequences

Z Zhou, DV Eldred, Y Xia, JK Vasquez, A Moreno… - …, 2022 - ACS Publications
MQ silicone copolymers (MQ resins) and polyethylenes are very important polymers that are
used in our daily lives. The microstructures of these polymers dictate some of their important …

Long Chain Branching Detection and Quantification in LDPE with Special Solvents, Polarization Transfer Techniques, and Inverse Gated 13C NMR Spectroscopy

Z Zhou, S Pesek, J Klosin, MS Rosen… - …, 2018 - ACS Publications
Recent global demand of polyethylene was 187 billion pounds with 23% being low density
polyethylene (LDPE). LDPE is used in a variety of applications including liners, consumer …

Long-Chain Branch Detection and Quantification in Ethylene–Hexene LLDPE with 13C NMR

Z Zhou, C Anklin, R Cong, X Qiu, R Kuemmerle - Macromolecules, 2021 - ACS Publications
Ethylene–hexene linear low-density polyethylene (LLDPE) is widely used in the packaging
industry due to its outstanding mechanical properties. Some LLDPEs contain long-chain …

Synthesis of Chain Shuttling Organometallic Compounds Capable of Producing Triblock Polyolefins

L Sun, E Szuromi, T Karjala, Z Zhou… - Macromolecules, 2020 - ACS Publications
Organometallic oligomeric compounds with dual-headed structure R'-(MR-) n M-R'were
developed enabling the synthesis of triblock polyolefins. The compounds comprise divalent …

Combining the Incompatible: Melt State Grafting between High-Density Polyethylene and Isotactic Polypropylene without a Coupling Agent

D Gloger, G Hubner, A Albrecht… - ACS Applied Polymer …, 2024 - ACS Publications
In this study, we report the coupling of high-density polyethylene (HDPE) and isotactic
polypropylene (iPP) into grafted block copolymers (HDPE-g-iPP) from HDPE and iPP …

Very Sensitive 13C NMR Method for the Detection and Quantification of Long-Chain Branches in Ethylene–Hexene Linear Low-Density Polyethylene

Z Zhou, C Anklin, R Kuemmerle, R Cong, X Qiu… - …, 2021 - ACS Publications
Some linear low-density polyethylene (LLDPE) resins are designed to have long-chain
branches (LCBs) to improve the viscoelastic properties. While improving the viscoelastic …

Crystallization behavior and structure of metallocene polyethylene with long-chain branch

W Wang, X Li, J Li, S Xin, S Jiang - Colloid and Polymer Science, 2022 - Springer
The investigations of the branching chain have influence on the crystallization behaviors
and structures in metallocene polyethylene (mPE) as compared to the Ziegler–Natta …