Thermoplastic poly(ester‐imide)s derived from anhydride‐terminated polyester prepolymer and diisocyanate

Abstract

The phase‐separation behavior of thermoplastic poly(ester‐imide) [P(E‐I)] multiblock copolymers, (A‐B)n, was investigated by a stepwise variation of the imide content. All the multiblock copolymers were synthesized by solution polycondensation with dimethylformamide as a solvent. P(E‐I)s were prepared with anhydride‐terminated polyester prepolymer and diisocyanates. Polyester prepolymers were prepared by the reaction of pyromellitic dianhydride and two different polyols [poly(tetramethylene oxide glycol) (PTMG) and polycaprolactone diol (PCL)]. Structural determination was done with Fourier transform infrared spectroscopy and Fourier transform NMR, and the molecular weight was determined by gel permeation chromatography. The effect of the imide content on the thermal properties of the synthesized P(E‐I)s was investigated by thermogravimetric analysis and differential scanning calorimetry. The polymers were also characterized for static and dynamic mechanical properties. Thermal analysis data indicated that the polymers based on PTMG were stable up to 330 °C in nitrogen atmosphere and exhibited phase‐separated morphology. Polymers based on PCL showed multistage decomposition, and the films derived from them were too fragile to be characterized for static and dynamic mechanical properties. © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 341–350, 2004

Burning‐rate enhancement of a high‐energy rocket composite solid propellant based on ferrocene‐grafted hydroxyl‐terminated polybutadiene binder

“…The thermal behavior25, 26 of HTPB and Fc‐HTPB were investigated by TGA carried out in nitrogen and in air. Figure 5(a,b) shows the thermograms of HTPB and Fc‐HTPB, respectively.…”

Composites of multiblock (segmented) aliphatic poly(ester imide) with zirconia nanoparticles: Synthesis, mechanical properties, and pervaporation behavior

“…Bands in the ranges 1220-1090 and 900-730 cm -1 are assigned to the out of plane bend ing vibrations of aromatic rings, depending on the sub stitution type. The structures of such block copoly mers were studied via IR spectroscopy in detail in [5,16,17].…”

“…The interest in polyim ides containing radicals of aliphatic polyethers or polyesters in their repeating units is not so much due to the increase in the processability of segmented poly(ester imides) relative to traditional polyimides as it is due to the possibility to obtain a new generation of thermoplastic elastomers on their basis that take advantage of microphase separation [5].…”

Synthesis and characterization of new poly(ester-imide)s based on 1,3-bis[4,4′-bis(trimellitimido) phenyl]-2-propenone and aromatic diols

“…Among these polymers poly(ester-imide)s (PEIs) are well known for their thermal resistance coupled with easy processability. [17][18][19][20][21][22][23][24][25][26][27] In this article, we describe synthesis and characterization of a new series of PEIs 9a-f containing chalcone segments between imide rings in the main chain by using microwave assisted polycondensation reaction of 1,3-bis [4,4'-bis(trimellitimidoyl chloride) phenyl]-2-propenone 7 with several aromatic diols 8a-f using a domestic microwave. In our pervious papers we reported synthesis and characterization of different polyamides, poly(amide-imide)s, polyesters and poly(ester-imide)s with improved solubility and thermal stability by using microwave assisted polycondensation.…”