Precision polyolefins

Complex Macromolecular Architectures Synthesis, Characterization, and Self-Assembly, First Edition. 

Edited by Nikos Hadjichristidis, Akira Hirao, Yasuyuki Tezuka and Filip Du Prez. 

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Y.Y. Wei, R. Graf, J.C. Sworen, C.Y. Cheng, C.R. Bowers, K.B. Wagener, H.W. Spiess, Local and collective motions in precise polyolefins with alkyl branches a combination of H-2 and C-13 solid-state NMR spectroscopy, Angew. Chem. Int. Ed. Engl. 48 (2009) 4617-4620. 

PRECISION POLYOLEFIN STRUCTURE MODELING POLYETHYLENE CONTAINING METHYL AND ETHYL... 

Figure 10.2 Precision polyolefins via ADMET polymerization followed by exhaustive hydrogenation.

ADMET polyolefins with precisely placed halogen atoms provide an excellent system for studying crystallization and melting behavior of precision polyolefins. By synthesizing... 

Figure 10.7 TEM images clearly show the effects of precise branch placement random polyolefins show a broad distribution of lamellar thicknesses precision polyolefins feature lamella of uniform thickness. (Reprinted from S. Hosoda, Y. Nozue, Y. Kawashima et al, Perfectly controlled lamella thickness and thickness distribution A morphological study on ADMET polyolefins, Macromolecular Symposia, 282, 50-64 2009, with the permission of John Wiley Sons, Inc.)...

Thermal behavior of precision polyolefins with increasing alkyl branch size... 

Increasing the Spacing Between Alkyl Branches in Precision Polyolefins... 

Synthesis of precision polyolefins containing protected sulfonic and phosphonic acids... 

Figure 10.11 Synthetic route to precision polyolefins functionalized with phosphonic acids and sulfonic acid esters.

Figure 10.15 Thermal behavior of precision amphiphilic copolymers with precisely placed amphiphilic branches simple structural modifications at the PEG branch terminus result in significant changes in behavior and morphology. (Reprinted with permission from E.B. Berda and K.B. Wagener, Inducing pendant group interactions in precision polyolefins Synthesis and thermal behavior, Macromolecules, 41, 5116-5122, 2008. 2008 American Chemical Society.)...

This chapter has discussed the behavior of precision polyolefins and then synthesis via metathesis polycondensation chemistry. The term precision polyolefin used here refers to a class of linear, defect-free polymers that mimic perfectly sequenced copolymers of ethylene... 

The incorporation of highly polar functional groups such as carboxylic, sulfonic and phosphonic acids produce materials that prove difficult to make industrially. These precision polyolefins are not only useful models in understanding stracture and property, but also attractive in advanced applications such as precision ionomers, biomedical materials, and membrane technologies. 

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