Copolymerization of 5-norbornene-2-metheneoxy-trimethylsilyl with methyl 5-norbornene-2-carboxylate catalyzed by a novel Ni(benzocyclohexan-ketonaphthylimino)2/B(C6F5)3) system
-
Xiaofeng Wang
,
Defu Chen
Abstract
Copolymerization of 5-norbornene-2-metheneoxy-trimethylsilyl [NB-CH2OSi(CH3)3] with norbornene (NB) or methyl 5-norbornene-2-carboxylate (NB-COOCH3) was carried out in toluene by using novel nickel(II) complex catalyst systems, Ni(benzocyclohexan-ketonaphthylimino)2/B(C6F5)3 [Ni(bchkni)2/B(C6F5)3]. The catalyst system showed high activity on the copolymerization of NB-CH2OSi(CH3)3 with NB (2.3–3.3×104 gpolymer/molNi·h) and NB-CH2OSi(CH3)3 with NB-COOCH3(0.5–3.0×104 gpolymer/molNi·h). However, the solubility of copolymers of NB-CH2OSi(CH3)3 with NB and NB-CH2OSi(CH3)3 with NB-COOCH3, which contain 18.7–86.7 mol% of NB-CH2OSi(CH3)3, was too poor to characterize. The achieved copolymers were confirmed to be vinyl-addition copolymers through the analysis of FTIR, 1H NMR, and 13C NMR spectra. The incorporation rate was 8.7–86.7 mol% at a content of 10–90 mol% of the NB-CH2OSi(CH3)3 in the monomer feeds ratios. The obtained ester functionalized NB copolymer containing 8.7–18.7 mol% of NB-CH2OSi(CH3)3 showed a moderate molecular weight (Mw=1.6–6.0×104 g/mol) and relative narrow molecular weight distribution (Mw/Mn=1.6–2.2). Thermogravimetry (TGA) analyses results showed that the copolymers exhibited good thermal stability (Td=330–350°C) and were noncrystalline by WAXD analyses results.
©2012 by Walter de Gruyter Berlin Boston
Artikel in diesem Heft
- Masthead
- Masthead
- Review
- Influence of hydrostatic pressure and volumetric strain on the mechanical long term behavior of polymers
- Original Articles
- Dynamic pressure analysis as a tool for determination of sharkskin instability by extrusion of molten polymers
- Young’s modulus and prediction of plastics/elastomer blends
- Comparison of tribological performance of PEEK, UHMWPE, glass fiber reinforced PTFE and PTFE reinforced PEI composite materials under dry and lubricated conditions
- Study on the solidification kinetics of high-density polyethylene during thin-walled injection molding process
- The influence of level of interfacial healing on the weld-line strengths of injection molded parts
- Investigation on Nylon 66 silicate nanocomposites modified under gamma radiation
- Effect of mold surface antistiction treatment on microinjection replication quality using Cr-N/Zr-DLC thin-layer coating
- Estimation of thermal conductivity of PP/Al(OH)3/Mg(OH)2 composites
- Preparation and characterization of polyvinyl alcohol/carbon nanotube (PVA/CNT) conductive nanofibers
- Copolymerization of 5-norbornene-2-metheneoxy-trimethylsilyl with methyl 5-norbornene-2-carboxylate catalyzed by a novel Ni(benzocyclohexan-ketonaphthylimino)2/B(C6F5)3) system
- A modified polyurethane elastomer using polyfunctional HTPB synthesized by in-situ nitroxide mediated polymerization of 1,3-butadiene
- Preparation and characterizations of ternary biodegradable blends composed of polylactide, poly(ε-caprolactone), and wood flour
- Polypropylene + boehmite nanocomposite fibers
- Development of PCL-PEG nanofibrous mats as alternative carriers for recombinant Chinese hamster ovary cells
Artikel in diesem Heft
- Masthead
- Masthead
- Review
- Influence of hydrostatic pressure and volumetric strain on the mechanical long term behavior of polymers
- Original Articles
- Dynamic pressure analysis as a tool for determination of sharkskin instability by extrusion of molten polymers
- Young’s modulus and prediction of plastics/elastomer blends
- Comparison of tribological performance of PEEK, UHMWPE, glass fiber reinforced PTFE and PTFE reinforced PEI composite materials under dry and lubricated conditions
- Study on the solidification kinetics of high-density polyethylene during thin-walled injection molding process
- The influence of level of interfacial healing on the weld-line strengths of injection molded parts
- Investigation on Nylon 66 silicate nanocomposites modified under gamma radiation
- Effect of mold surface antistiction treatment on microinjection replication quality using Cr-N/Zr-DLC thin-layer coating
- Estimation of thermal conductivity of PP/Al(OH)3/Mg(OH)2 composites
- Preparation and characterization of polyvinyl alcohol/carbon nanotube (PVA/CNT) conductive nanofibers
- Copolymerization of 5-norbornene-2-metheneoxy-trimethylsilyl with methyl 5-norbornene-2-carboxylate catalyzed by a novel Ni(benzocyclohexan-ketonaphthylimino)2/B(C6F5)3) system
- A modified polyurethane elastomer using polyfunctional HTPB synthesized by in-situ nitroxide mediated polymerization of 1,3-butadiene
- Preparation and characterizations of ternary biodegradable blends composed of polylactide, poly(ε-caprolactone), and wood flour
- Polypropylene + boehmite nanocomposite fibers
- Development of PCL-PEG nanofibrous mats as alternative carriers for recombinant Chinese hamster ovary cells
