Multiblock Elastomers TPEAA and TPEEA: Physical Structure and Properties.

Joanna Rokicka,Svetoslav Volfson,Jolanta Janik,Anton Nikiforov,Katarzyna Wilpiszewska,Beata Schmidt

doi:10.3390/ma14247720

Abstract

A three series of terpolymers composed of the blocks PTMO (MPTMO = 1000 g/mol) or DLAol (MDLAol = 540 g/mol), PA12 (MPA12 = 2000 g/mol) and xGT (DPxGT = 2) with various chemical compositions of ester block were obtained. The series differ in the chemical structure of the flexible block and weight content of the soft phase. The effect of the number of carbons dividing the terephthalate groups on the synthesis, structure and properties of these elastomers has been investigated. To confirm assumed chemical structure Carbon-13 (13C NMR) and Proton (1H NMR) Nuclear Magnetic Resonance and Fourier-transform Infrared Spectroscopy (FT-IR) were used. The influence of chemical compositions of ester block on the thermal properties and the phase separation of obtained systems were defined by Differential Scanning Calorimetry (DSC), Dynamic Mechanical Thermal Analysis (DMTA) and Wide Angle X-ray Scattering (WAXS). The mechanical and elastic properties were evaluated.

Highlights

Thermoplastic elastomers (TPEs) are materials that combine the flexibility of traditional elastomers with the ease of processing characteristic for thermoplastics [1,2,3,4]
A three series of terpolymers composed of the blocks poly(oxytetramethylene)diol with molecular weight g/mole (PTMO) (MPTMO = 1000 g/mol) or
The series differ in the chemical structure of the flexible block and the weight content of the soft phase

Summary

Introduction

Thermoplastic elastomers (TPEs) are materials that combine the flexibility of traditional elastomers with the ease of processing characteristic for thermoplastics [1,2,3,4]. The properties of TPE are the result of combining the individual characteristics of the blocks; the key to the design of these materials is to select the system components in such a way that a stable micro- or nanostructure is formed. The functional and processing properties of TPE depend, among others, on their physical structure and the key factors affecting it, such as the content of individual blocks and their chemical structure; molecular weight, as well as mutual miscibility, is necessary to design new polymers dedicated to strictly defined purposes. The presented literature from recent years comprehensively describes two-block systems Their nanostructure and its influence on the properties of copolymers are well known, and further research focuses mainly on the design of new materials [24,25,26,27,28,29]

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Results

Conclusion