Copolymerization of Ethyl Methacrylate with N-(3- or 4-Halogenphenyl)maleimidse:The Monomer Reactivity Ratios

摘要

The copolymerization of ethyl methacrylate [I] with N-(3-chlorophenyl)ma-leimide [II],N-(4-chlorophenyl)maleimide [III],N-(3-bromophenyl)maleimide [TV],and N-(4-bromophenyl)maleimide [V] was carried out in benzene,using #alpha#,#alpha#'-azobisisobu-tyronitryle as an initiator at 60 deg C.The copolymer compositions were estimated by elemental analysis.The monomer reactivity ratios of [I] (#UPSILON#_1) with [II],[III],[IV],and [V] (#UPSILON#_2) were determined by the Fineman-Ross and Kelen-Tudos methods,and recalcu-lated using the nonlinear minimization algorithm based on Mayo-Lewis's method (RREVM).The Alfrey-Price copolymerization Q and e for N-(3- or 4-halogenphenyl)maleimides were also calculated.The kind of halogen atom (Br- or Cl-) and its position in the phenyl ring of maleimide on the values of reactivity ratios #UPSILON#_1 and #UPSILON#_2 are discussed.