scholarly journals Synthesis of ultra‐high molecular weight polymers by controlled production of initiating radicals

2019 ◽  
Vol 57 (18) ◽  
pp. 1922-1930 ◽  
Author(s):  
Amin Reyhani ◽  
Stephanie Allison‐Logan ◽  
Hadi Ranji‐Burachaloo ◽  
Thomas G. McKenzie ◽  
Gary Bryant ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
High Molecular Weight Polymers ◽  
Ultra High Molecular Weight

Synthesis of ultrahigh molecular weight polymers by homopolymerisation of higher α-olefins catalysed by aryloxo-modified half-titanocenes

RSC Advances ◽  
2016 ◽  
Vol 6 (20) ◽  
pp. 16203-16207 ◽  
Author(s):  
Kotohiro Nomura ◽  
Sarntamon Pengoubol ◽  
Wannida Apisuk
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Molecular Weight Distributions ◽  
High Molecular Weight Polymers ◽  
Ultrahigh Molecular Weight ◽  
Weight Distributions ◽  
Ultra High Molecular Weight

Polymerisations of 1-dodecene, 1-hexadecene, 1-octadecene by Cp*TiX2(O-2,6-iPr2C6H3) – cocatalysts afforded (ultra)high molecular weight polymers with unimodal molecular weight distributions.

Separating ultra-high molecular weight polymers on monolithic capillary columns

2013 ◽  
Vol 87 (2) ◽  
pp. 308-313 ◽  
Author(s):  
E. N. Viktorova ◽  
A. A. Korolev ◽  
V. A. Orekhov ◽  
A. Yu. Kanat’eva ◽  
A. A. Kurganov
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Capillary Columns ◽  
High Molecular Weight Polymers ◽  
Monolithic Capillary Columns ◽  
Ultra High Molecular Weight

An unsymmetrical binuclear iminopyridine-iron complex and its catalytic isoprene polymerization

2020 ◽  
Vol 56 (62) ◽  
pp. 8846-8849 ◽  
Author(s):  
Liang Wang ◽  
Xiaowu Wang ◽  
Hongbin Hou ◽  
Guangqian Zhu ◽  
Zhenyu Han ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Iron Complex ◽  
Binuclear Complexes ◽  
High Molecular Weight Polymers ◽  
Ultra High Molecular Weight ◽  
Isoprene Polymerization

A series of chloride-bridged unsymmetrical Fe(ii)-HS/Fe(ii)-LS binuclear complexes has been developed, which can efficiently catalyze isoprene polymerization with 0.00025 mol% loading, delivering ultra-high molecular weight polymers.

scholarly journals Solution-processable and functionalizable ultra-high molecular weight polymers via topochemical synthesis

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Christopher L. Anderson ◽  
He Li ◽  
Christopher G. Jones ◽  
Simon J. Teat ◽  
Nicholas S. Settineri ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Solid State ◽  
High Molecular Weight ◽  
Crystal Packing ◽  
Polymerization Reaction ◽  
Capacitive Energy Storage ◽  
Topochemical Polymerization ◽  
Microscopy Technique ◽  
High Molecular Weight Polymers ◽  
Ultra High Molecular Weight

AbstractTopochemical polymerization reactions hold the promise of producing ultra-high molecular weight crystalline polymers. However, the totality of topochemical polymerization reactions has failed to produce ultra-high molecular weight polymers that are both soluble and display variable functionality, which are restrained by the crystal-packing and reactivity requirements on their respective monomers in the solid state. Herein, we demonstrate the topochemical polymerization reaction of a family of para-azaquinodimethane compounds that undergo facile visible light and thermally initiated polymerization in the solid state, allowing for the first determination of a topochemical polymer crystal structure resolved via the cryoelectron microscopy technique of microcrystal electron diffraction. The topochemical polymerization reaction also displays excellent functional group tolerance, accommodating both solubilizing side chains and reactive groups that allow for post-polymerization functionalization. The thus-produced soluble ultra-high molecular weight polymers display superior capacitive energy storage properties. This study overcomes several synthetic and characterization challenges amongst topochemical polymerization reactions, representing a critical step toward their broader application.

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