含聚乳酸之三成份液液相平衡及溶液流動性研究

The Study of ternary liquid-liquid equilibria and the fluidness of solution contains the poly(DL-lactic) acid

陳均樺(Chun-Hua Chen)

指導教授 ： 張基昇

國立臺北科技大學/工程學院/化學工程研究所/碩士(2008年)

摘要

本研究主要以非溶劑-溶劑-聚合物（NS-S-P）三成份系統之相圖製作為主題，聚合物部分我們選用消旋聚乳酸（poly(DL-lactide)；PDLLA），溶劑選用丙酮、非溶劑則選用乙醇和水，在常壓下，實驗的溫度選定在24℃、37℃、45℃。液液相平衡部分，利用濁點法製作三成份系統之液液相平衡曲線；溶液流動性曲線部分，則是利用Brookfield黏度儀，藉由三成份均相溶液之組成與黏度的關係來討論其行為。
實驗結果顯示，液液相平衡行為的溫度相依性不大。並利用Flory-Huggins model作液液相平衡曲線的分析計算，以取得六個雙成分交互作用參數值。

關鍵字

消旋聚乳酸 ； 液液相平衡 ； 黏度 ； 丙酮 ； 乙醇 ； Flory-Huggins model

並列摘要

In the study of ternary system of nonsolvent – solvent – polymer phase equilibrium. For substances choosing, we had taken poly-(DL-lactic acid) as our polymer one, chosen ethanol as our solvent one, and taken acetone or water as our nonsolvnet ones. In the first part of our researches, we had used the cloud point method to prepare binodal curve. Experiment temperatures were chosen at 24℃、37℃、45℃, pressure in normal. The second part we used Brookfield instrument to measure the viscosity of ternary component mixtures , to observe the fludility of solutions.
According to the experiment data, we have found the phase behavior of our systems depend on temperature. We can used the Flory-Huggins model to correlate the data of binodal curve that the values of three binary interaction parameters were determined from those correlation calculations.

並列關鍵字

PDLLA ； acetone ； pure water ； liquid-liquid equilibria ； ethanol ； Flory-Huggins model

參考文獻

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