Sirisinha, Kalyanee published the artcileImprovement of melt stability and degradation efficiency of poly(lactic acid) by using phosphite, COA of Formula: C42H63O3P, the publication is Journal of Applied Polymer Science (2021), 138(10), 49951, database is CAplus.
Concurrent improvement of melt processing stability and degradation efficiency of poly(lactic acid) (PLA) is still a challenge for the industry. This article presents the use of phosphites: tris(nonylphenyl) phosphite (TNPP) and tris (2,4-di-tert-butylphenyl) phosphite (TDBP), to control the thermal stabilization, mech. performance, and hydrolytic degradation ability of the compressed PLA films. The hydrolysis process is followed as a function of time at 45, 60, and 75°C. During melt extrusion, both phosphites function as a processing aid, besides acting as a chain extender stabilizing the PLA mol. weight The phosphite structure plays a crucial role over crystallinity and water absorption, in controlling the hydrolytic degradation of PLA. The application of TNPP significantly catalyzes the hydrolysis of PLA, which is the initial step of the biodegradation process. The optimum amount of TNPP for best hydrolytic degradation efficiency and thermal stabilization of PLA is 0.5 weight%. The excessive TNPP loadings cause a drastic drop in PLA mol. weight and, as a consequence, a reduction of flexural strength. The reactions between PLA and phosphite mols. are discussed.
Journal of Applied Polymer Science published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C10H10O3, COA of Formula: C42H63O3P.
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