Effect of mold temperature on the long‐term viscoelastic behavior of polybutylene terepthalate

Abstract

The effect of mold temperature variation during injection molding on the long‐term viscoelastic behavior of polybutylene terepthalate (PBT) was studied by dynamic mechanical thermal analysis (DMTA) and flexural creep tests. The time–temperature superposition (TTS) principle was applied to the experimental data and the master curves were created to predict their long‐term behavior. The WLF and Arrhenius models were verified for the shift data in the investigating temperature range and the activation energies for the deformation process were calculated based on the Arrhenius equation. Further a four‐element Burger model was applied to the creep results to represent the creep behavior of the PBT processed at two different mold temperatures and to better understand the deformation mechanism. Differential scanning calorimetry (DSC) and density measurements were accomplished to characterize the process‐dependent microstructures. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers

Dynamic Moduli of Polybutylene Terephthalate Glass Fiber Reinforced in High-Temperature Environments

“…The Data Analysis software of TA Instrument was used to produce master curves [44]. For this work, reference temperatures that were lower but close to the glass transition temperature were selected.…”

Solventless High Throughput Manufacturing of Poly(butylene terephthalate) Nanofibers

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“…15 The high rate of crystallization of PBT as compared to poly(ethylene terephthalate) (PET) 16 leads to shorter cycle times in injection molding, and hence this polymer has been used for a variety of applications in automobile parts, electrical components, and consumer goods. 17,18 PBT nanofibers with superior chemical resistance are very attractive for the filtration of physiological fluids and hot chemicals. Moreover, these nanofibers are a candidate to replace PET in tissue engineering applications as scaffolds for endothelial cells.…”

Biobased Pyrazine-Containing Polyesters

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