NDLI: Reactive triblock polymers from tandem ring-opening polymerization for nanostructured vinyl thermosets

Content Provider	Royal Society of Chemistry (RSC)
Author	Moench, Sarah Hillmyer, Marc A. Amendt, Mark A. Pitet, Louis M.
Copyright Year	2012
Abstract	Multiply functional hydroxyl telechelic poly(cyclooctene-s-5-norbornene-2-methylene methacrylate) was synthesized by ring opening metathesis (co)polymerization of cis-cyclooctene and 5-norbornene-2-methylene methacrylate using the second generation Grubbs catalyst in combination with a symmetric chain transfer agent bearing hydroxyl functionality. The resulting hydroxyl-telechelic polymer was used as a macroinitiator for the ring opening transesterification polymerization of d,l-lactide to form reactive poly(lactide)-b-poly(cyclooctene-s-5-norbornene-2-methylene methacrylate)-b-poly(lactide) triblock polymers. Subsequently, the triblocks were crosslinked by free radical copolymerization with several vinyl monomers including styrene, divinylbenzene, methyl methacrylate, and ethyleneglycol dimethacrylate. Certain conditions led to optically transparent thermosets with mesoscale phase separation as evidenced by small angle X-ray scattering, differential scanning calorimetry and transmission electron microscopy. Disordered, bicontinuous structures with nanoscopic domains were generated in several cases, rendering the samples attractive for size-selective membrane applications.
Starting Page	1827
Ending Page	1837
Page Count	11
File Format	HTM / HTML PDF
ISSN	17599954
Volume Number	3
Issue Number	7
Journal	Polymer Chemistry
DOI	10.1039/c1py00450f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ethylene glycol Differential scanning calorimetry Cyclooctene Divinylbenzene Polymerization Polymer Transesterification Grubbs Methylene group Grubbs' catalyst Lactide Small-angle X-ray scattering Hydroxy group Chain transfer Transmission electron microscopy Styrene Free-radical halogenation Mesoscopic physics Norbornene Olefin metathesis Methyl methacrylate
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Bioengineering Biomedical Engineering Polymers and Plastics

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