Solvent Resistance of Modified Poly(vinyl alcohol)

• Main Authors: Guan-Cheng Du, 杜冠成
• Other Authors: 鄭國忠
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/7tfx9f

碩士 === 國立臺北科技大學 === 化學工程研究所 === 95 === 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).