Polylactic acid, also known as polylactide, belongs to the polyester family. Polylactic acid is a polymer obtained by polymerization of lactic acid as a main raw material, and the raw materials are abundant and can be regenerated. Polylactic acid production process pollution-free, but also biodegradable products to achieve in the nature of the cycle, it is the ideal green polymer materials.
Polylactic acid (H- [OCHCH3CO] n-OH) thermal stability, processing temperature 170 ~ 230 ℃, good solvent resistance, can be processed by a variety of ways, such as extrusion, spinning, biaxial stretching , Injection blow molding. In addition to biodegradable products made of polylactic acid, biocompatibility, gloss, transparency, feel and heat resistance, polylactic acid (PLA) developed by Brilliance Albert also has some antibacterial, flame retardant It is used in a wide range of applications as packaging materials, fibers and nonwovens. It is mainly used in garments (underwear, garments), industry (construction, agriculture, forestry, paper making) and healthcare.
PLA molecular weight and viscosity (experimental results for reference only)
① Mn = 55872η1.2967 → η = 2.18 × 10-4Mη0.77
② Mw = 264911η1.7519 → η = 8.03 × 10-4 Mw0.57
③ Mn = 126911η1.6982 → η = 9.88 × 10-4Mn0.59
④ Mz = 472515η1.7836 → η = 6.59 × 10-4Mz0.56
⑤Mz + 1 = 670038η1.7453 → η = 4.59 × 10-4 Mz + 10.57
Where: η is the viscosity;
Mη is the viscosity average molecular weight;
Mw is the weight average molecular weight;
Mn is the number average molecular weight;
Mz is Z average molecular weight;
Mz + 1 is the Z + 1 average molecular weight.
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