Reverse Dissolution as a Route in the Synthesis of Poly(vinyl butyral) with High Butyral Contents

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• 作者：Biao Yang ; Rengang Liu ; Jijun Huang ; Hui Sun
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：June 5, 2013
• 年：2013
• 卷：52
• 期：22
• 页码：7425-7431
• 全文大小：305K
• 年卷期：v.52,no.22(June 5, 2013)
• ISSN：1520-5045

文摘

For applications in ultrafiltration membranes, cancer cell uptake, bioimaging, and diagnostics, a reverse dissolution approach, where swollen poly(vinyl alcohol) (PVA) particles are added to a butyraldehyde solution in ethanol, is employed to synthesize poly(vinyl butyral) (PVB) with high contents of butyral groups. The final butyral group content (up to 84%) of PVB is found to be dependent strongly on the initial condensed state of PVA, the degree of polymerization of PVA, the purity and volume of ethanol, and the pH value. A maximum of butyral group content may be obtained under conditions: swollen PVA particles, (95 vol鈥?) ethanol of 125鈥?50 mL, and pH 1. This reverse dissolution approach has advantages such as a mild reaction condition (70 掳C), no predissolution of PVA at high temperatures, no vacuum removal of water during reaction, and low water consumption in post-treatment of the product.