Dej Solubility ntawm Polyvinyl Alcohol – Premium PVA Solutions Muaj

PVA yuav tawb hais rau cov neeg lawv no yog cov txhais hydrolysis degree (DH) thiab cov ntsuam molecule (MW). PVA thiaj hydrolyzed (DH ≥98%) mus qhov twg 80-90°C los yog tau, muaj teem ntawv hais lub, ntawm thiab, meej xyoo, los yog tau, meej nyob rau hauv tub, thiab, meej nyob rau hauv tub, thiab, meej nyob rau hauv tub. Low-MW PVA (13-23k Da) muaj teem ntawv hais lub, ntawm thiab, meej nyob rau hauv tub, thiab, meej nyob rau hauv tub, thiab, meej nyob rau hauv tub. Cov neeg lawv no yog cov txhais hydrolysis degree (DH) thiab cov ntsuam molecule (MW). PVA thiaj hydrolyzed (DH ≥98%) mus qhov twg 80-90°C los yog tau, muaj teem ntawv hais lub, ntawm thiab, meej nyob rau hauv tub, thiab, meej nyob rau hauv tub, thiab, meej nyob rau hauv tub. Particle size matters: fine powders dissolve quicker than coarse granules. Solubility peaks at 60°C, with modern formulations achieving 99.7% dissolution in 15 minutes at 70°C. Overheating may cause gelation. Typically, PVA reaches 5-20% w/v solubility, with higher concentrations increasing viscosity. For example, PVA 2488 (DH 98-99%, MW ~140k Da) dissolves at 95°C, forming strong films, while PVA 1788 (DH 87-89%, MW ~140k Da) dissolves at 20°C, ideal for cold-process applications.