Magnesium lactate Uses: Widely used in food, beverages, dairy products, flour, nutrition and pharmaceuticals. Magnesium lactate is an excellent, economical magnesia organic enhancer, widely added to various foods to supplement the lack of magnesium in food, to prevent a variety of magnesium deficiency, and enhance the vitality of a significant effect.
2013年8月9日星期五
PLA synthesis methods using direct polymerization
PLA synthesis methods using direct polymerization, ring-opening polymerization, copolymerization and the polymerization of a chain extender. Is currently used more ring-opening polymerization, the method can be obtained relatively large molecular weight, high mechanical strength polymer. Sodium lactate is an isotactic polymer, wherein the main chain of the stereochemistry of the polymerization process in the PLA by adjusting the D-and L-lactic acid monomer to form a random or block ratio of stereoregular polymer, and the relative molecular mass directly by adding a compound containing a hydroxyl group (such as lactic acid, water, alcohol, etc.) to control. Further, by controlling the stereochemistry of PLA, can accurately control the zinc lactate, the crystallization rate, mechanical properties and processing temperature, can be indirectly controlled polymer degradation rate. Large molecular weight PLA is colorless, has a high strength and modulus properties similar to polystyrene.
订阅:
博文评论 (Atom)
没有评论:
发表评论