Disclosed herein is a novel crystalline form of low molecular weight poly(ethylene terephthalate). This crystalline form may be produced from molten or glassy low molecular weight poly(ethylene terephthalate) material by means of rapid heat transfer to or from the material. The poly(ethylene terephthalate) composition is suitable for use as a starting material for solid-state polymerization in order to produce polymers of higher molecular weight. A higher molecular weight polymer product having a unique physical form can be produced by solid-state polymerization of the low molecular weight poly(ethylene terephthalate).
申请公布号
EP0804498(A1)
申请公布日期
1997.11.05
申请号
EP19960902123
申请日期
1996.01.11
申请人
E.I. DU PONT DE NEMOURS AND COMPANY
发明人
STOUFFER, JAN, M.;BLANCHARD, ELWOOD, NEAL;LEFFEW, KENNETH, WAYNE