Nishikawa, Riho published the artcileCrystallinity enhancement of extruded polypropylene containing poly(vinyl alcohol) fibers prepared in situ, Safety of Tris(2,4-di-tert-butylphenyl) phosphite, the publication is Polymer (2022), 125043, database is CAplus.
The present paper describes a novel method for reinforcing isotactic polypropylene (PP) by adding poly(vinyl alc.) (PVA) fibers prepared by melt-stretching. Low-viscosity PVA droplets were deformed into fibers in the molten PP by melt-stretching them beyond the m.p. of PVA. When the obtained composite was extruded below the m.p. of PVA, the fibers became oriented toward the flow direction. The PVA demonstrated marked nucleating activity with regard to PP crystallization, which was further promoted by enlargement of the surface area by fibrillization. As a result, there was virtually no orientation relaxation of the PP chains with an increase in crystallinity, which explains the improvement in rigidity of the reinforced composite.
Polymer 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 C42H63O3P, Safety of Tris(2,4-di-tert-butylphenyl) phosphite.
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