Poly(ether/ester)s based on poly(butylene terephthalate) and poly(ethylene glycol), 1. Poly(ether/ester)s with various polyether: polyester ratios

Abstract

A series of poly(ether/ester)s 1 based on poly(buty1ene terephthalate)*) and poly(ethy1ene glycol) is synthesized. 'H and "C nuclear magnetic resonance, infrared and differential scanning calorimetry (DSC) measurements prove a block structure of the prepared copolymers. The DSC curves suggest the existence of a three-phase morphologytwo amorphous phases for both polyether and polyester segments, and a crystalline phase for the polyester segments. Small angle X-ray scattering (SAXS) measurements lead to the same conclusion. The degree of crystallinity assigned to the polyester fraction differs in4gnificantly and is similar to that of the homopolymer. SAXS data show approximately the same long spacing for all crystallizable copolymers. The tensile parameters of the studied polymers are similar to those of available commercial products based on poly(buty1ene terephthalate) and poly(tetrahydrofuran). a) Systematic IUPAC nomenclature: poly(oxytetramethyleneoxyterephthaloy1). b, Systematic IUFAC nomenclature: poly(oxytetramethy1ene).

Synthesis and characterization of a poly(ether–ester) copolymer from poly(2,6 dimethyl‐1,4‐phenylene oxide) and poly(ethylene terephthalate)

“…11,12 Segmented copolymers had been synthesized by one-or two-step solution polymerization processes. 8 Synthetic routes to segmented copolyesters take advantage of the reactivity among suitable functional chemical groups present in the parent polymers.…”

Mechanical properties in torsion for poly(butylene terephthalate) and a poly(ether ester) based on poly(ethylene glycol) and poly(butylene terephthalate)

“…Both the PEE and PBT were synthesized as described elsewhere. 3 The granules obtained after rotating table, thus allowing measurements of the residual twist at a couple equal to zero; and (2) the synthesis of both components were finely milled and put into the barrow of a molecular flow the fixed lower clamp was replaced with a rotatable one in order to more precisely adjust the samindex apparatus MFI-6542 from Donau Electronic, Switzerland, which was used to obtain ple at zero couple.…”

“…poly(butylene terephthalate) (PBT) and poly(tetramethylene glycol) (PTMG), had outstanding More recently we investigated the mechanical behavior of the PEG type of PEE. 3,4 It was shown physical properties and processing characteristics. 1 PEE based on PBT and poly(ethylene glythat these polymers orient themselves through col) (PEG) were also synthesized and were shown necking, which takes place up to several hundred generally to have worse characteristics than those percent strain.…”

Structures and mechanical properties of zone-drawn-zone-annealed blends of cocrystallizing poly(butylene terephthalate) and a poly(ether ester)

“…The PEE was prepared in a semicommercial scale 22 using PEG of molecular weight 1000 g/mol and having a PBT/PEG w t ratio of 49/51. Both the PBT and PEE were cooled in liquid nitrogen, finely ground, and then mixed in a ratio of PBT/PEE = 51/49 wt ' 3% to produce the blend containing a total amount of 75 wt % PBT.…”