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RESEARCH PRODUCT

Influence of plasticizers and cryogenic grinding on the high-cooling-rate solidification behavior of PBT/PET blends

Saeed M. Al-zahraniDomenico CarboneStefano PiccaroloAnesh Manjaly Poulose

subject

Materials scienceEthylenePolymers and PlasticsPlasticizer02 engineering and technologyGeneral ChemistryCooling ratesContinuous cooling transformation010402 general chemistry021001 nanoscience & nanotechnologyCryogenic grinding01 natural sciences0104 chemical sciencesSurfaces Coatings and FilmsGrindinglaw.inventionchemistry.chemical_compoundCooling ratechemistrylawMaterials ChemistryCrystallizationComposite material0210 nano-technology

description

Two structurally different plasticizers (cyclic and linear) and the effect of cryogenic grinding on the solidification behavior at high cooling rates by a continuous cooling transformation approach of poly(butylene terephthalate)/poly(ethylene terephthalate), PBT/PET, blends are described. The solidification curve (density versus cooling rate) is confirmed as an effective tool to compare the differences in crystallization behavior under conditions mimicking processing. In comparison to the bulky cyclic plasticizer, the linear oligomeric one was found to have a more pronounced influence on the crystallization behavior. A 60/40 by weight PBT/PET blend shows a drop-off of density at ∼50 K/s. In the plasticized sample, the long-range crystalline order appears up to a cooling rate of ∼250K/s, making the blend comparable to pure PBT. Grinding the components before blending further improves crystallizability and synergy to the addition of the plasticizer. The results suggest the important role of local chain mobility in the solidification behavior at high cooling rates. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43083.

yearjournalcountryeditionlanguage
2015-11-23Journal of Applied Polymer Science
https://doi.org/10.1002/app.43083