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Synthesis of high‐ T g polymers by ring‐opening metathesis polymerization of N ‐cycloalkylnorbornene dicarboximide
Author(s) -
Contreras Armando Pineda,
Cerda Alfredo Masiel,
Tlenkopatchev Mikhail A.
Publication year - 2002
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(200208)203:12<1811::aid-macp1811>3.0.co;2-j
Subject(s) - romp , norbornene , polymer chemistry , ring opening metathesis polymerisation , copolymer , monomer , metathesis , polymerization , ring opening polymerization , ruthenium , polymer , chemistry , materials science , catalysis , organic chemistry
Ring‐opening metathesis polymerization (ROMP) of N ‐(1‐adamantyl)‐ exo ‐norbornene‐5,6‐dicarboximide (AdNDI) ( 3a ) and N ‐cyclohexyl‐ exo ‐norbornene‐5,6‐dicarboximide (ChNDI) ( 3b ) was performed using well‐defined vinylidene ruthenium (II) catalysts Cl 2 (PR 3 ) 2 RuCCH( t ‐Bu) (R = Ph and Cy). The homopolymer of 3a showed a T g of 271 °C while poly‐ChNDI of 3b had a T g of 129 °C. Copolymers of these monomers with norbornene (NB) demonstrated significant T g increases compared to unsubstituted poly‐NB. Analysis of copolymers of 3a and NB isolated at the initial stages of copolymerization showed that both monomers were incorporated randomly and displayed very similar reactivity.ROMP of 3a and 3b .