Acrylate-terminated nitrile

ATBN - amine terminated nitrile rubber X - Flory Huggins interaction parameter CPE - carboxylated polyethylene d - width at half height of the copolymer profile given by Kuhn statistical segment length DMAE - dimethyl amino ethanol r - interfacial tension reduction d - particle size reduction DSC - differential scanning calorimetry EMA - ethylene methyl acrylate copolymer ENR - epoxidized natural rubber EOR - ethylene olefin rubber EPDM - ethylene propylene diene monomer EPM - ethylene propylene monomer rubber EPR - ethylene propylene rubber EPR-g-SA - succinic anhydride grafted ethylene propylene rubber... 

Carboxy-terminated nitrile rubber Elastomeric copolymer from ethylene and ethyl acrylate Ethylene-glycidyl methacrylate copolymer Copolymer from ethylene and methacrylic acid Copolymer from ethylene and methylmethacrylate... 

Modified acrylics, also referred to as second-generation acrylics or no-mtx adhesives, are composed of a modified acrylic adhesive and a surface activator. Typical modified acrylics are based on cross-linked polymethyl methacrylate grafted to vinyl-terminated nitrile rubber. Carbojqfl-terminated rubbers have also been used. 

Abstract. Auto-accelerated polymerization is known to occur in viscous reaction media ("gel-effect") and also when the polymer precipitates as it forms. It is generally assumed that the cause of auto-acceleration is the arising of non-steady-state kinetics created by a diffusion controlled termination step. Recent work has shown that the polymerization of acrylic acid in bulk and in solution proceeds under steady or auto-accelered conditions irrespective of the precipitation of the polymer. On the other hand, a close correlation is established between auto-acceleration and the type of H-bonded molecular association involving acrylic acid in the system. On the basis of numerous data it is concluded that auto-acceleration is determined by the formation of an oriented monomer-polymer association complex which favors an ultra-fast propagation process. Similar conclusions are derived for the polymerization of methacrylic acid and acrylonitrile based on studies of polymerization kinetics in bulk and in solution and on evidence of molecular associations. In the case of acrylonitrile a dipole-dipole complex involving the nitrile groups is assumed to be responsible for the observed auto-acceleration. 

Similarly, nitrile oxides react with methyl acrylate 2.42 to give the adduct 2.43 with the substituent on C-5 and terminal alkenes also react in this way to place the alkyl group on C-5. Many dipoles react well with electron-rich dipolarophiles, but not with electron-poor dipolarophiles. Other dipoles are the other way round. To make matters even more complex, the presence of substituents on the dipole can change these patterns and impart their own regioselectivity. Thus the carbonyl ylid reaction 2.45 has a well defined regiochemistry determined only by the substituents, since the core dipole is symmetrical. This reaction also illustrates the point that dipolarophiles do not have to be alkenes or alkynes—they can also have heteroatoms. 

Some nitriles also add across 1,2-dienes (Scheme 28). Alkynylcyanation takes place predominantly across the internal double bond of 1,2-dienes to give selectively cyanoalkyl-substituted enynes [83, 84]. Cyanoformates also add across 1,2-dienes in a similar manner in the presence of nickel catalyst alone to give cyanoalkyl-substituted acrylates [85, 86], whereas carbocyanatitm of 1,2-dienes with other nitriles remains unexplored. The 1,2-diene-carbocyanation can be initiated by oxidative addition followed by the coordination of 1,2-dienes at the terminal double bond, and subsequent migratory insertion into the C-Ni bond... 

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