Controlled, copper-catalyzed functionalization of polyolefins

Macromolecules

Volumn 38, Issue 12, 2005, Pages 4966-4969

  Díaz Requejo, M Mar ^a   Wehrmann, Peter ^d   Leatherman, Mark D ^c   Trofimenko, Swiatoslaw ^b   Mecking, Stefan ^d   Brookhart, Maurice ^c   Pérez, Pedro J ^a  

^a UNIVERSITY OF HUELVA   (Spain)

^b UNIVERSITY OF DELAWARE   (United States)

^c University of North Carolina at Chapel Hill   (United States)

^d UNIVERSITY OF KONSTANZ   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

FUNCTIONALIZATION; HYDROBORATION; POLAR SURFACES; RADICAL PROCESSES;

CATALYSIS; COPOLYMERIZATION; COPPER; ETHYLENE; HYDROCARBONS; MOLECULAR WEIGHT; PARAFFINS; POLYMERS; POLYPROPYLENES; THERMAL EFFECTS;

POLYOLEFINS;

EID: 21644451240     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma050626f     Document Type: Article

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24. 2 was then added, at room temperature, with the aid of a syringe pump. After completion, no EDA was observed by GC. The volume was reduced to 1 mL, and then methanol was added (70 mL). The resulting solid was filtered off and washed with methanol (2 × 40 mL). Further filtration and drying under vacuum gave the functionalized polymers in 85-90% isolated yields.
25. (b) Poly(ethylene-1-octene): 0.2 g was dissolved in a mixture of toluene (5 mL) and dichloromethane (5 mL). Following the above procedure, white solids were isolated in 85-90%.
26. (c)Polypropylene was functionalized following the above procedure for polybutene.
27. 3).
28. Molecular weight determination of polymers was carried out on a PL GPC-220 instrument equipped with a mixed B column set in trichlorobenzene at 160°C. Data are referenced vs narrow polyethylene standards. The atactic low-molecular-weight polypropylene samples were analyzed on a PL GPC-50 instrument at room temperature in THF, employing refractive index and UV-vis detection. Data are referenced to polystyrene standards.
29. The increased apparent molecular weight of the functionalized product in entry 9 stands out. Changes in hydrodynamic behavior by functionalization (cf. discussion of poly(2-butene) functionalization) probably can account for the observed effect only partially, comparing these data with that of all other polymers.