改質聚乙烯醇之抗溶劑性質

Solvent Resistance of Modified Poly(vinyl alcohol)

杜冠成(Guan-Cheng Du)

指導教授 ： 鄭國忠

國立臺北科技大學/工程學院/化學工程研究所/碩士(2007年)

摘要

本研究探討聚乙烯接枝馬來酸酐(PE-g-MA)，改質不同鹼化度的聚乙烯醇，期間探討改質過的聚乙烯醇(modified poly(vinyl alcohol), MPVA)的吸水率與抗有機溶劑性質。在吸水率試驗中發現，在PVA(BP05，鹼化度約88mole%)含量為60wt%的改質聚乙烯醇，八小時吸水率為6.62wt%；在PVA(BC05，鹼化度約74mole%)含量為50wt%的改質聚乙烯醇，八小時吸水率為6.72wt%。吸收鄰位-二甲苯率試驗中，PVA含量70wt%的MPVA(BP05)和PVA含量70wt%的MPVA(BC05)都具有良好的抗鄰位-二甲苯性，當PVA含量低於70wt%，表面的膨潤程度會明顯增加。在鄰位-二甲苯滲透試驗中發現PVA(BP05)含量70wt%時，14天平均滲透率為(0.42%/day)。改質聚乙烯醇的楊氏模數會隨著PVA含量增加而上升：PVA(BP05) 含30wt%為19.9MPa，PVA(BP05)含70wt%為44.7MPa，PVA(BC05)含30wt%為19.4MPa，PVA(BC05)含70wt%為162.7MPa。

關鍵字

聚乙烯醇 ； 吸水率 ； 吸鄰位-二甲苯率 ； 電位滴定

並列摘要

In this study, poly(vinyl alcohol) (PVA) was modified with polyethylene grafted maleic anhydride. First, two type of PVA, BP05 with hydrolysis about 88 mole%, or BC05 with hydrolysis about 74 mole%, was blended and reacted with maleic anhydride polyethylene in a banbury mixer. The uptake of water or o-xylene was measured. It was found that the uptake of water is about 6.62wt% after 8 hours for the modified polymers with 60 wt% of PVA (BP05), and is 6.72wt% for the modified polymers with 50 wt% of PVA (BC05). The polymers with 70wt% of PVA show good resistance to o-xylene. O-xylene permeability of modified polymer with 70wt% of PVA (BP05) is about (0.42%/day) after 14 days. The tensile modulus of the modified PVA decreases with increasing of polyethylene grafted maleic anhydride. The Young's modulus is about 44.7 MPa for the polymers with 70wt% PVA (BP05), and 162.7 MPa for the polymers with 70wt% PVA (BC05).

並列關鍵字

PVA ； water uptake ； o-xylene uptake ； Potentiometric titration

參考文獻

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