@article{Gregory:2020:10.1039/d0sc00463d,
author = {Gregory, GL and Sulley, GS and Carrodeguas, LP and Chen, TTD and Santmarti, A and Terrill, NJ and Lee, K-Y and Williams, CK},
doi = {10.1039/d0sc00463d},
journal = {Chemical Science},
pages = {6567--6581},
title = {Triblock polyester thermoplastic elastomers with semi-aromatic polymer end blocks by ring-opening copolymerization},
url = {http://dx.doi.org/10.1039/d0sc00463d},
volume = {11},
year = {2020}
}

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TY  - JOUR
AB  - Thermoplastic elastomers benefit from high elasticity and straightforward (re)processability; they are widely used across a multitude of sectors. Currently, the majority derive from oil, do not degrade or undergo chemical recycling. Here a new series of ABA triblock polyesters are synthesized and show high-performances as degradable thermoplastic elastomers; their composition is poly(cyclohexene-alt-phthalate)-b-poly(ε-decalactone)-b-poly(cyclohexene-alt-phthalate) {PE–PDL–PE}. The synthesis is accomplished using a zinc(II)/magnesium(II) catalyst, in a one-pot procedure where ε-decalactone ring-opening polymerization yielding dihydroxyl telechelic poly(ε-decalatone) (PDL, soft-block) occurs first and, then, addition of phthalic anhydride/cyclohexene oxide ring-opening copolymerization delivers semi-aromatic polyester (PE, hard-block) end-blocks. The block compositions are straightforward to control, from the initial monomer stoichiometry, and conversions are high (85–98%). Two series of polyesters are prepared: (1) TBPE-1 to TBPE-5 feature an equivalent hard-block volume fraction (fhard = 0.4) and variable molar masses 40–100 kg mol−1; (2) TBPE-5 to TBPE-9 feature equivalent molar masses (∼100 kg mol−1) and variable hard-block volume fractions (0.12 < fhard < 0.4). Polymers are characterized using spectroscopies, size-exclusion chromatography (SEC), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA). They are amorphous, with two glass transition temperatures (∼−51 °C for PDL; +138 °C for PE), and block phase separation is confirmed using small angle X-ray scattering (SAXS). Tensile mechanical performances reveal thermoplastic elastomers (fhard < 0.4 and N > 1300) with linear stress–strain relationships, high ultimate tensile strengths (σb = 1–5 MPa), very high elongations at break (&ep
AU  - Gregory,GL
AU  - Sulley,GS
AU  - Carrodeguas,LP
AU  - Chen,TTD
AU  - Santmarti,A
AU  - Terrill,NJ
AU  - Lee,K-Y
AU  - Williams,CK
DO  - 10.1039/d0sc00463d
EP  - 6581
PY  - 2020///
SN  - 2041-6520
SP  - 6567
TI  - Triblock polyester thermoplastic elastomers with semi-aromatic polymer end blocks by ring-opening copolymerization
T2  - Chemical Science
UR  - http://dx.doi.org/10.1039/d0sc00463d
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000544484900021&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://pubs.rsc.org/en/content/articlelanding/2020/SC/D0SC00463D#!divAbstract
UR  - http://hdl.handle.net/10044/1/86154
VL  - 11
ER  - 

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