Copolyetherimides compositions having high glass transition temperatures and outstanding ductility are presented. The copolyetherimides having M
w
of at least 40,000 comprising isomeric bis(phthalimide) structural units within a relatively narrow range of isomer proportions exhibited Tgs of at least 240° C. and outstanding Notched Izod values. The copolyetherimides comprise oxydianiline residues and structural units of the formulas (I) and (II) (III). The copolyetherimides are characterized by a mole percentage of structural units derived from 4,4′-biphenol in a range from about 55% to about 85% of all bisphenol-derived structural units present in the copolyetherimide composition; a mole percentage of structural units derived from bisphenol A in a range from about 45% to about 15% of all bisphenol-derived structural units present in the copolyetherimide composition; and a total mole percentage of structural units derived from bisphenol A or 4,4′-biphenol of at least 95% of all bisphenol-derived structural units present in the copolyetherimide composition.
介绍了具有高
玻璃化转变温度和优异韧性的共聚醚
酰亚胺组合物。具有至少40,000的Mw的共聚醚
酰亚胺包括在一个相对狭窄的异构比例范围内的同分异构的双
酞酰亚胺结构单元,表现出至少240°C的
玻璃化转变温度和优异的切口冲击值。共聚醚
酰亚胺包括氧代
苯胺残基和公式(I)和(II)(III)的结构单元。共聚醚
酰亚胺的特征是:从所有双
酚衍生结构单元中派生的结构单元的摩尔百分比在55%至85%的范围内;从所有双
酚衍生结构单元中派生的结构单元的摩尔百分比在45%至15%的范围内;以及从
双酚A或4,4'-联
苯酚衍生的结构单元的总摩尔百分比至少为所有双
酚衍生结构单元的95%。