5Newmark R A. Sequence distribution in polyethylene/tetram- ethylene terephthalate copolyesters by 13 C-NMR [ J ]. J Polym Sci Polym Chem, 1980,18 ( 2 ) :559 - 563.
6Jeziomy A. Parameters characterizing the kinetics of the non- isothermal crystallization of poly( ethylene terephthalate) deter- mined by d. s. c. [J]. Polymer, 1978, 19(10) :1142 - 1144.