hpmc power-Why control the balance of hydroxypropyl and methoxy groups in HPMC products?

hpmc power-Why control the balance of hydroxypropyl and methoxy groups in HPMC products? The ratio of HPMC’s hydroxypropyl value to methoxy value has a great influence on the water solubility, surface activity and gel temperature of the product. If the methoxy value is high and the hydroxypropyl value is low, the water solubility and surface …