申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0299689A2
公开(公告)日:1989-01-18
A polyamide comprising from 60 to 100 % by mole of divalent terephthaloylalkylenediamine constituent units (a), from 0 to 40 % by mole of divalent diacyloylalkylenediamine constituent units (b) and from 0.1 to 5 % by mole of trivalent diacyloylalkylenediamine units (c), said constituent units (a), (b) and (c) being arranged at random to provide a branched linear structure, said polyamide being free from a gel-forming cross-linked structure and soluble in concentrated sulfuric acid and having: an intrinsic viscosity [η] of from 0.5 to 3 dl/g, as measured in concentrated sulfuric acid at a temperature of 30°C., a melting point of from 280°C to 370°C. and a glass transition temperature of from 100°C to 160°C., as measured by means of a differential scanning calorimeter at a heating rate of 10°C/min., and a crystallinity of from 10 to 30 %, as measured by X-ray diffractometry. The polyamide has an excellent gas-barrier property, and thus, it is useful in applications where a gas-barrier property is particularly required, alone or in a blend or lamination with other melt-moldable polymers.
一种聚酰胺,由 60%至 100%(按摩尔计)的二价对苯二甲酰亚胺组成单元(a)、 0%至 40%(按摩尔计)的二价二乙酰亚烷基二胺组成单元(b)和 0.所述组成单元(a)、(b)和(c)随机排列以提供支化线性结构,所述聚酰胺不含凝胶形成的交联结构,可溶于浓硫酸,并具有: 在 30°C 的浓硫酸中测量的固有粘度[η]为 0.5 至 3 dl/g、熔点 280°C 至 370°C,玻璃化转变温度 100°C 至 160°C。这种聚酰胺具有极佳的气体阻隔性,因此在特别需要气体阻隔性的应用中,无论是单独使用,还是与其他可熔融成型聚合物混合或层压使用,都非常有用。