樹枝狀水性PU壓克力樹脂之光硬化動力學與機械性質探討

The Study on Kinetics and Mechanical Properties of UV Curing Type Waterborne Polyurethane Acrylate Dendrimer

蔡仲倫(Chung-Lun Tsai)

指導教授 ： 芮祥鵬

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2010年)

https://doi.org/10.6841/NTUT.2010.00446

摘要

本實驗主要以本實驗室合成的不同官能基數的聚氨酯壓克力樹狀高分子(PU-acrylate Dendrimer)；包含了IPDI及TDI系統，分別為含5、9、13個官能基數，加入不同濃度的光起始劑(Photoinitiator)DC-1173，在不同的操作溫度20、40、60、80℃，經UV光照射後，探討其光硬化動力學(Kinetic)之反應速率和轉換率(Conversion)之差異，主要測詴儀器為DPA(Double Beam Photocalorimetric Accessory) 。探討實驗結果可發現隨光起始劑濃度在添加到最佳光起始濃度之前其轉換率、反應速率及反應級數會變大，到達最佳濃度後會因為大量的自由基快速的再結合而導致轉換率、反應速率、反應級數下降，而隨著反應溫度的提升其轉換率、反應速率、反應級數也會隨溫度提高而提升。在機械性質方面，5個PU壓克力官能基樹脂因其官能基數較少所以導致硬度不高，因此添加線性單體季戊四醇三丙烯酸酯(Pentaerythritol triacrylate；PETA)與樹脂反應，可發現當添加25wt%PETA後，硬度皆大幅提升，至於附著力方面也可發現塗佈在木材基板上附著力明顯優於鋁板。

關鍵字

轉換率 ； 動力學 ； 光起始劑 ； 樹枝狀高分子 ； 反應速率

並列摘要

The polymer used in this study is PU-acrylate dendrimer with different numbers of functional groups synthesized from our laboratory. It contains two systems: IPDI and TDI system; with five, nine and thirteen functional groups respectively. A series of results were concluded after the polymer exposed to UV-light. The discussion is to explore the effects of UV-curing kinetic and conversion under various temperature (20.40.60.80℃) and different concentration of photo-initiator (DC-1773). The major continued test is done by DPA(Double Beam Photo-calorimetric Accessory). Through the results of tests, we discovered that the conversion, reaction rate and reaction order enhanced before the concentration of photo-initiator reach to a optimum level. After over the certain optimum concentration, the conversion, reaction rate and reaction order go down because numerous free radicals re-combine rapidly. However, the conversion, reaction rate and reaction order is enhanced when the reaction temperature increased. In the mechanical properties, PU-acrylate dendrimer with only five functional groups so that its hardness is not strong. Therefore, we incorporate PETA(Pentaeythritol triacrylate) to react with resin.With adding to 25wt% of PETA, its toughness increase substantially and its adhesion on the wood plate is better than aluminium plate obviously.

並列關鍵字

conversion ； kinetic ； photo-initiator ； dendrimer ； reaction rate

參考文獻

12. 陳烱達， 樹枝狀高分子型光硬化樹脂之光硬化動力學分析與物性探討，碩士論文，國立臺北科技大學有機高分子研究所，臺北，2007。

13. 劉譯淇，利用環氧樹脂合成超分枝高分子及其性質，碩士論文，國立臺北科技大學化學工程研究，臺北，2009。

26. R. B. Prime , " Differential Scanning Calorimeter of the Epoxy Cure Reaction ," Polymer Eng. Sci., vol. 13, 1973, pp.365.

27. K. Dusek and M. Bleha , " Curing of Epoxide Resins :Model Reaction of Curingwith Amine ," J. Polym. Sci,Polym Chem Ed., vol. 15, 1977, pp.2393.

28. P. F. Bunyan and A. V. Cunliffe , " Microcalorimetric determination of the cure reaction in some fluorinated polyether rubbers," Thermochimica acta, vol. 276, 1996, pp.134