The emulsion polymerization of the norbornene ring system catalyzed by noble metal compounds

Ring‐Opening Metathesis Polymerization (ROMP) and Related Processes

“…These limitations are primarily the result of reactions between the heteroatoms in the monomers and the typically oxophilic metal centers of the ROMP initiators (these side reactions include Wittig-type reactions with carbonyl groups and cationic ring opening of the heterocycle) (Brown-Wensley et al, 1983;Wittbecker etal., 1960). As a result of the earlier work of Michelotti, and Rinehart (Michelotti and Keaveney, 1965;Michelotti and Carter, 1965;Rinehart and Smith, 1965) on ill definedcatalysts, Grubbs and co-worker studied the ROMP of 7-oxanorbornene derivatives ( Fig. 3-16) in organic solvents by using a variety of transition metal salts .…”

Development of hydrogenated ring-opening metathesis polymers

“…The polymers with bulky tricyclodecane structures had significantly higher glass-transition temperatures than the corresponding polymers with cyclopentane structures reported in previous articles. [27][28][29] An increase in the alkyl-chain length on the ester moiety resulted in a considerable decrease in the glasstransition temperature. Interestingly, cyano-substituted polymers had higher glass-transition temperatures, and the glass-transition temperatures of 3f and 3g could not be detected under the decomposition temperature.…”

“…One of the interestingfeaturesof ROMP is thatthe appropriatecatalystselection enables it to polymerize cyclic olefins with polar substituents. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] However, thereare very few reports concerning the thermaland physical propertiesof metathesispolymers except for several commercialized polymers such as poly(1-octenylene) 20 and poly(norbornene). 21 Thebulkypolycyclic monomersareexpected to offer new polymers thathave high glass-transition temperaturesand show good transparency because the bulky and unsymmetrical polycyclic structurein the main chain should preventcrystallization.…”

Preparation and properties of ester or cyano group substituted ring-opening polymers and their hydrogenated derivatives

“…One of the interesting features is that a certhe metathesis polymers except for several comtain selection of the catalyst system enables us to mercialized polymers such as trans-poly(1-penpolymerize cyclic olefins bearing polar substitutenylene), [13][14][15] trans-(poly (1-octenylene), 16 and ents. [3][4][5][6][7][8][9][10] Another characteristic is the introducpolymers of norbornene. 17,18 In 1977, some reports tion of an alicyclic structure into the polymer and patents appeared mainly concerning the polymain chain, which leads to high T g .…”