Synthesis and Characterization of Block Copolymers of Polystyrene and Thermotropic Liquid Crystalline Polyesters
作者:Cheng-Chih Chen、Chih-Hung Lin
DOI:10.13005/ojc/340114
日期:2018.2.28
measurement. Optical polarizing microscopy measurements verify the presence of a smectic liquidcrystalline phase for the block copolymers. The block copolymers represent a microphaseseparated morphology, i.e., both amorphous and liquidcrystalline properties were displayed by the polystyrene and liquidcrystallinepolyester segments respectively.
ELASTIC FIBERS, PROCESS FOR PRODUCING THE SAME, AND POLYESTER ELASTOMER TO BE USED THEREIN
申请人:TEIJIN LIMITED
公开号:EP0771831A1
公开(公告)日:1997-05-07
The present invention relates to an elastic fiber of polyester elastomer mainly comprising the polyester elastomer further comprising aromatic polyester component as a hard segment and poly(alkyleneoxide)glycol having a number-average molecular weight of 500 to 5000 as a soft segment, wherein a residual elongation after 400 percent stretching does not exceed 100 percent. Made of the polyester elastomer comprising 1,2-bis[4-(2-hydroxyethyl)phenoxy]ethane as the diol component constituting said aromatic polyester component, or 1,4-benzenediethanol and ethyleneglycol as the diol component constituting said aromatic polyester component, the elastic fiber features excellent elastic properties in the event of great deformation and provides suitable material for clothing.
POLYETHYLENE-2,6-NAPHTHALATE COMPOSITION WITH EXCELLENT BLOW MOLDABILITY, AND MOLDED PRODUCT THEREOF
申请人:Teijin Limited
公开号:EP3109271A1
公开(公告)日:2016-12-28
The object of the present invention is to provide a highly crystalline polyethylene-2,6-naphthalate composition by achieving high molecular weight of PEN, wherein the polyethylene-2,6-naphthalate composition has greatly improved blow moldability and provides molded products having excellent hue, excellent weathering resistance, and additionally excellent transparency. The above-mentioned problems can be solved by a polyethylene-2,6-naphthalate composition comprising a specific phosphoric acid which is a phosphorus compound, cobalt element derived from a cobalt compound, manganese element derived from a manganese compound, and antimony element derived from an antimony compound, wherein the content of each of the elements simultaneously satisfies the following expressions (1) to (4): 10≤Co≤30mmol% 0.50≤P/Mn≤1.28 10≤Sb≤25mmol% 0.60≤IV≤1.50dL/g
Polyethylene-2,6-naphthalate composition with excellent blow moldability, and molded product thereof
申请人:TEIJIN LIMITED
公开号:US10017629B2
公开(公告)日:2018-07-10
The object of the present invention is to provide a highly crystalline polyethylene-2,6-naphthalate composition by achieving high molecular weight of PEN, wherein the polyethylene-2,6-naphthalate composition has greatly improved blow moldability and provides molded products having excellent hue, excellent weathering resistance, and additionally excellent transparency. The above-mentioned problems can be solved by a polyethylene-2,6-naphthalate composition comprising a specific phosphoric acid which is a phosphorus compound, cobalt element derived from a cobalt compound, manganese element derived from a manganese compound, and antimony element derived from an antimony compound, wherein the content of each of the elements simultaneously satisfies the following expressions (1) to (4):
10≤Co≤30 mmol % (1)
0.50≤P/Mn≤1.28 (2)
10≤Sb≤25 mmol % (3)
0.60≤IV≤1.50 dL/g (4).