MECHANICAL-PROPERTIES AND CHEMICAL-STABILITY OF PIVALOLACTONE-BASED POLY(ETHER ESTER)S

POLYMER

卷:35

Article

TIJSMA, EJ ; VANDERDOES, L ; BANTJES, A ; VULIC, I

关键词: PIVALOLACTONE;    POLY(ETHER ESTER)S;    PROCESSING;   

DOI  :  10.1016/S0032-3861(05)80012-6

来源: Elsevier

【 摘 要 】

The processing, mechanical and chemical properties of poly(ether ester)s, prepared from pivalolactone (PVL), 1,4-butanediol (4G) and dimethyl terephthalate (DMT), were studied. The poly(ether ester)s could easily be processed by injection moulding, owing to their favourable theological and thermal properties. The tensile response of a poly(ether ester) with a butylene terephthalate (4GT) content of 72 mol%, which exhibited the phenomena of necking and strain-hardening, was related to the morphology of these copolymers. The influence of the short 4G-PVL segments was reflected in a high Young's modulus and yield stress, and resulted in a tough behaviour for the poly(ether ester), with an ultimate elongation of 500%. The poly(ether ester)s were stable towards treatment at room temperature with water or weakly acidic or alkaline solutions. Conditioning at 90 degrees C in water for 264 h resulted in a water uptake of 1 wt%, whereas the rate of hydrolysis was 0.0003 (expressed in Delta eta(rel) h(-1)) for the poly(ether ester) with a 4GT content of 72 mol%. Although a decay in the mechanical properties for the PVL-based poly(ether ester) after exposure to water at 90 degrees C was observed, these materials were assumed to have a higher hydrolytical stability than other poly(ether ester)s.

【 授权许可】

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