Reactive triblock polymers from tandem ring-opening polymerization for nanostructured vinyl thermosets
- UMM
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.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- NSFUNIVERSITYU.S. AIR FORCE- OFFICE OF SCIENTIFIC RESEARCH
- OSTI ID:
- 1050081
- Journal Information:
- Polym. Chem. - UK, Vol. 3, Issue (7) ; 2012
- Country of Publication:
- United States
- Language:
- ENGLISH
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BEARINGS
CALORIMETRY
CATALYSTS
CHAINS
COPOLYMERIZATION
DIVINYLBENZENE
FUNCTIONALS
MEMBRANES
METHACRYLATES
METHACRYLIC ACID ESTERS
OPENINGS
POLYMERIZATION
POLYMERS
RADICALS
SCATTERING
STYRENE
TRANSMISSION ELECTRON MICROSCOPY
VINYL MONOMERS