WebApr 14, 2024 · Also, the solution and solvent properties (i.e., dielectric constant, surface tension, apparent viscosity, and surface charge density), polymer nature (i.e. mean molecular weight, molecular weight distribution, and molecular configuration) and ambient and equipment parameters are the most important factors on spinnability of polymer, … WebIn contrast, the crystallization curve of pyrene mixed with relatively polar poly(2-vinylpyridine) is observed in the higher temperature domain despite the melting temperature curve of the pyrene crystals with poly(2-vinylpyridine) being shifted to the lower temperature domain due to the favorable chemical compatibility between pyrene and poly(2 …
POLYMER CRYSTALLIZATION - Wiley Online Library
WebThe effects of storage on the crystallization, dissolution and absorption of tolbutamide from amorphous tolbutamide-2-hydroxypropyl-beta-cyclodextrin (HP-beta-CyD) complex were investigated, in comparison with those of polyvinylpyrrolidone (PVP) solid dispersion. The amorphous solid complex of tolbu … WebMay 1, 2002 · Evolution of the phase crystallinity as a function of the contact time between the polymer melt and the cooling roll clearly shows the presence of three crystallization zones: 1) an amorphous zone ... oratech phone number
Recrystallization upon solvent vapor annealing and impact of …
Crystallization of polymers is a process associated with partial alignment of their molecular chains. These chains fold together and form ordered regions called lamellae, which compose larger spheroidal structures named spherulites. Polymers can crystallize upon cooling from melting, mechanical stretching or solvent evaporation. Crystallization affects optical, mechanical, thermal and chemical properties of the polymer. The degree of crystallinity is estimated by differe… WebSep 3, 2024 · Here, relatively low HFP content was chosen to slightly reduce the polymer crystallinity, and thus improve its solubility in organic solvents. The resulting triblock … WebThe ageing conditions chosen included both a high temperature for short times (160 ºC from 1-6 h) and a low temperature for long times (120 ºC from 120-720 h), which were used to generate ... oratech hydraulic oil 46