An FTIR Study on the Solid‐State Copolymerization of bis(2‐hydroxyethyl)terephthalate and Poly(butylene terephthalate) and the Resulting Copolymers

Abstract

Summary: The first aim of this work was to study the solid‐state copolymerization (SSP) of bis(2‐hydroxyethyl)terephthalate (BHET) with poly(butylene terephthalate) (PBT) by FTIR spectroscopy. The development of the chemical microstructure during the SSP‐reaction was examined as a function of the BHET content, showing the different regimes. The thermal behaviour of the resulting copolymers with different BHET contents was also investigated during cooling using infra‐red dynamic spectra. For low BHET‐concentrations, only crystallization of PBT‐sequences was observed, while for high BHET‐concentrations, only crystallization of PET‐sequences was detectable with a cross‐over behaviour for intermediate concentrations.

Solid-State Modification of Poly(butylene terephthalate) with a Bio-Based Fatty Acid Dimer Diol Furnishing Copolyesters with Unique Morphologies

“…Changes in the signal intensities upon heating were found for the bands at 1320, 1387, 1458, and 1504 cm −1 , which correspond to CH 2 bending and wagging modes in the PBT crystal phase and a mode from the aromatic ring, respectively. [42][43][44]46 Moreover, no additional absorption bands that would show cocrystallization of FADD with PBT were observed.…”

Role of Polymer Interactions with Clays and Modifiers on Nanomechanical Properties and Crystallinity in Polymer Clay Nanocomposites

“…Aliphatic C-H asymmetric stretching [35] 2863 Aliphatic C-H symmetric stretching [35] 1722 C=O stretching [37] 1583 Aromatic C=C stretching [38] 1504 Aliphatic C-H 2 bending [37] 1453 Aliphatic C-H 2 bending [39] 1407 Aliphatic aromatic C-H in-of-plane bending [36] PBT 1387 CH 2 wagging [39] 1281 (C=O-)-O stretching [35] 1110 CH 2 -O stretching [35] 1017 Aromatic C-H bending [35] 873 Aromatic C-H bending [40] 808 Aromatic C-H bending [37] 729 Aromatic C-H out-of-plane bending [35,36] 685…”

Polyamide‐6,6‐based blocky copolyamides obtained by solid‐state modification

“…To the best of our knowledge, Jansen et al applied for the first time the SSP process for the chemical modification of a condensation polymer, viz . poly(butylene terephthalate) (PBT).…”