Unexpected effects of inorganic phosphate glass on crystallization and thermo-rheological behavior of polyethylene terephthalate

POLYMER

卷:154

Article

Kim, Kyoungtae¹  Rahimi, Shahab Kashani¹  Alam, Todd M.²  Sorte, Eric G.²  Otaigbe, Joshua U.¹ 

[1] Univ Southern Mississippi, Sch Polymer Sci & Engn, 118 Coll Dr, Hattiesburg, MS 39406 USA

[2] Sandia Natl Labs, Dept Organ Mat Sci, POB 5800, Albuquerque, NM 87185 USA

关键词: Polyethylene terephthalate;    Phosphate glass;    Hybrids;    Crystallization and nucleation;    Rheology;    Solid state NMR;   

DOI  :  10.1016/j.polymer.2018.08.066

来源: Elsevier

【 摘 要 】

The effects of ultra-low glass transition temperature (T-g) phosphate glass (Pglass) on the thermal, morphological, rheological, mechanical, and crystallization properties of hybrid Pglass/poly(eththylene terephthalate)(PET) were investigated. Nano- and micro-scale distribution of the Pglass in the PET polymer matrix was observed. The polydispersed Pglass in the PET matrix functioned as a nucleation agent, resulting in increasing crystallization temperature. The Pglass in the PET matrix decreased the T-g, indicating a plasticizing effect of the Pglass in the hybrids that was confirmed by the significantly decreased complex viscosity of the PET matrix. In addition, with increasing temperature, a non-terminal behavior of the viscoelastic properties occurred due to the hybrid structural changes and improved miscibility of the hybrid components. Further, the obtained solid-state variable temperature P-31 and H-1 NMR spectroscopy results showed strong Pglass concentration dependency of the interactions at the PET-Pglass interface.

【 授权许可】

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