A physical property-improving reagent which comprises an alkenoylcarbamate compound of the formula: ##STR1## wherein R is a hydrogen atom or a lower alkyl group, X is an oxygen atom (--O--), a sulfur atom (--S--) or a substituted or unsubstituted imino group (--NR'--), R' being a hydrogen atom or a lower alkyl group, and Y is the residue of an active hydrogen atom-containing compound excluding --X--H therefrom dissolved in an organic solvent having a solubility parameter of not less than 8, which can impart excellent physical properties to a polymer produced with the same.
一种物理性质改善试剂,其包括式为:##STR1##的烯烃酰基
氨基酸酯化合物,其中R为氢原子或较低的烷基,X为氧原子(--O--)、
硫原子(--S--)或取代或未取代的
亚胺基(--NR'--),其中R'为氢原子或较低的烷基,Y为除了--X--H之外的含有活性氢原子的化合物残基,溶于具有不小于8的溶解度参数的有机溶剂中,可赋予由其生产的聚合物优异的物理性质。