Alternating ring-opening copolymerization of cyclohexene oxide with phthalic anhydride catalyzed by iron(III) salen complexes

2015 ◽  
Vol 23 (2) ◽  
pp. 161-166 ◽  
Author(s):  
Robert Mundil ◽  
Zdeněk Hošt’álek ◽  
Ivana Šeděnková ◽  
Jan Merna
Keyword(s):  
Phthalic Anhydride ◽  
Ring Opening ◽  
Cyclohexene Oxide ◽  
Salen Complexes

scholarly journals Ring-Opening Copolymerization of Cyclohexene Oxide and Cyclic Anhydrides Catalyzed by Bimetallic Scorpionate Zinc Catalysts

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1651
Author(s):  
Felipe de la Cruz-Martínez ◽  
Marc Martínez de Sarasa Buchaca ◽  
Almudena del Campo-Balguerías ◽  
Juan Fernández-Baeza ◽  
Luis F. Sánchez-Barba ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Mechanism ◽  
Catalytic System ◽  
Phthalic Anhydride ◽  
Ring Opening ◽  
High Selectivity ◽  
Zinc Complexes ◽  
Cyclohexene Oxide ◽  
Reaction Conditions ◽  
Cyclic Anhydrides

The catalytic activity and high selectivity reported by bimetallic heteroscorpionate acetate zinc complexes in ring-opening copolymerization (ROCOP) reactions involving CO2 as substrate encouraged us to expand their use as catalysts for ROCOP of cyclohexene oxide (CHO) and cyclic anhydrides. Among the catalysts tested for the ROCOP of CHO and phthalic anhydride at different reaction conditions, the most active catalytic system was the combination of complex 3 with bis(triphenylphosphine)iminium as cocatalyst in toluene at 80 °C. Once the optimal catalytic system was determined, the scope in terms of other cyclic anhydrides was broadened. The catalytic system was capable of copolymerizing selectively and efficiently CHO with phthalic, maleic, succinic and naphthalic anhydrides to afford the corresponding polyester materials. The polyesters obtained were characterized by spectroscopic, spectrometric, and calorimetric techniques. Finally, the reaction mechanism of the catalytic system was proposed based on stoichiometric reactions.

scholarly journals Di-magnesium and zinc catalysts for the copolymerization of phthalic anhydride and cyclohexene oxide

2014 ◽  
Vol 5 (20) ◽  
pp. 6068-6075 ◽  
Author(s):  
Prabhjot K. Saini ◽  
Charles Romain ◽  
Yunqing Zhu ◽  
Charlotte K. Williams
Keyword(s):  
Phthalic Anhydride ◽  
Ring Opening ◽  
Cyclohexene Oxide

Di-zinc and di-magnesium catalysts for the ring-opening copolymerization of phthalic anhydride and cyclohexene oxide are presented. They are applied in terpolymerizations to prepare block copoly(ester-carbonates).

scholarly journals Heterodinuclear catalysts Zn(ii)/M and Mg(ii)/M, where M = Na(i), Ca(ii) or Cd(ii), for phthalic anhydride/cyclohexene oxide ring opening copolymerisation

2021 ◽  
Author(s):  
Arron C. Deacy ◽  
Christopher B. Durr ◽  
Ryan W. F. Kerr ◽  
Charlotte K. Williams
Keyword(s):  
Schiff Base ◽  
Phthalic Anhydride ◽  
Schiff Base Ligand ◽  
Ring Opening ◽  
Cyclohexene Oxide ◽  
Oxide Ring ◽  
Selective Catalysis

A series of heterodinuclear catalysts, coordinated by a Schiff base ligand, for ring opening copolymerisation of phthalic anhydride/cyclohexene oxide, highlight the best metal combinations for fast and selective catalysis.

Ring-Opening of Unsymmetrical 1,2-Dioxines Using Cobalt(II) Salen Complexes

2005 ◽  
Vol 70 (2) ◽  
pp. 470-476 ◽  
Author(s):  
Ben W. Greatrex ◽  
Dennis K. Taylor
Keyword(s):  
Ring Opening ◽  
Salen Complexes

A Novel Photosensitive Polyimide: A Polyimide Containing the Hydroxytriphenylamine Structure with Diazonaphthoquinone

2000 ◽  
Vol 12 (1) ◽  
pp. 177-184 ◽  
Author(s):  
Satoshi Akimoto ◽  
Mitsutoshi Jikei ◽  
Masa-aki Kakimoto
Keyword(s):  
Aqueous Solution ◽  
Phthalic Anhydride ◽  
Ring Opening ◽  
Polyimide Film ◽  
Tetramethylammonium Hydroxide ◽  
Thermal Cyclization

A novel photosensitive polyimide based on a polyimide containing the hydroxytriphenylamine structure (HTA-PI) and 2, 3, 4-tris[1-oxo-2-diazonaphthoquinone-4-sulfonyloxy] benzophenone (D4SB) as a photoreactive compound has been developed. The HTAPI was prepared by the ring-opening polyaddition of 4, 4′-hexafluoroisopropylidenebis(phthalic anhydride) (6FDA) and 4,4′-diamino-4″-hydroxytriphenylamine (DHTA), followed by thermal cyclization in refluxing N-methyl-2-pyrrolidone (NMP). The resulting polyimide film showed excellent transparency to 436 nm light. Photosensitive polyimide containing 30 wt% of D4SB showed a sensitivity of 800 mJ cm−2 and a contrast of 0.8 when it was exposed to 436 nm light followed by development with 5% tetramethylammonium hydroxide (TMAH) aqueous solution at 45°C.

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