FT-IR studies of factors affecting the diffusivity of oligo (oxyethylene) fatty acid ester in PE films: Effect of temperature, ethylene oxide chain length and base resin type
| Autor: | Kalyan Sehanobish, Qing Shi, Yuanyuan Zhou, Rudi J. A. Steenbakkers, Lei Hou, Hongyu Chen, Peiyi Wu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Ethylene oxide Organic Chemistry Fatty acid Fatty acid ester 02 engineering and technology Polyethylene 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Arrhenius plot 0104 chemical sciences Linear low-density polyethylene chemistry.chemical_compound Low-density polyethylene chemistry Polymer chemistry Materials Chemistry High-density polyethylene 0210 nano-technology |
| Zdroj: | Polymer. 130:150-160 |
| ISSN: | 0032-3861 |
| Popis: | A migration kinetics study of a series of oligo (oxyethylene) fatty acid esters of various chain lengths in polyethylene film was studied using Fourier transform infrared (FT-IR) spectroscopy. Diffusion coefficients ( D ) were determined as a function of temperature, ethylene oxide (EO) chain length and base resin type. The activation energy of diffusion ( E a ) for each oligo (oxyethylene) fatty acid ester was determined using the Arrhenius plot of D dependence on inverse temperature. The correlation between obtained D and the number-averaged molecular weight M n of oligo (oxyethylene) fatty acid ester was described well by a power law expression ( D = b M n − a ), and the parameters a and b were determined from experimental data. Two other models, which have the form of an Eyring expression, were derived to express the effects of temperature and EO chain length on the diffusion process of oligo (oxyethylene) fatty acid esters. Diffusivity of oligo (oxyethylene) fatty acid ester in linear low density polyethylene (LLDPE) was higher than in high density polyethylene (HDPE) and low density polyethylene (LDPE). |
| Databáze: | OpenAIRE |
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