Solvent ageing polymer crystallization
WebAbstract. We studied the crystallization of semiflexible polymer chains in melts and poor-solvent solutions with different concentrations using dissipative particle dynamics (DPD) … WebThe effects of storage on the crystallization, dissolution and absorption of tolbutamide from amorphous tolbutamide-2-hydroxypropyl-beta-cyclodextrin (HP-beta-CyD) complex were …
Solvent ageing polymer crystallization
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WebThe blends were spray coated to form films and kinetically stabilized by solvent vapor annealing that caused their recrystallization. The hole mobility determined in organic field-effect transistors based on the blends was found to correlate with the molecular architecture of ADIs (their alkyl-to-aromatic ratios).
WebSep 7, 2024 · Highly crystalline polymers are rigid, high melting, and less affected by solvent penetration. Crystallinity makes a polymers strong, but also lowers their impact resistance. As an example, samples of polyethylene prepared under high pressure (5000 atm) have high crystallinities (95 - 99%), but are extremely brittle 21. http://polybiolab.ippt.pan.pl/research/solution-crystallization
WebNov 1, 2006 · Polymer ageing may involve physical ageing without chemical reaction occurring; chemical changes such as crosslinking during curing of a thermoset; thermal … WebMar 21, 2009 · Influence of ageing on the cold crystallization of glassy poly ... or the solvent-induced crystallization. * Corresponding author 580 Moreover, ... Geil P H (1973) Polymer single crystals. John Wiley & Sons Inc., New York 2. Mandelkern L (1964) Crystallization of Polymers. McGraw-Hill, New York 3.
WebApr 14, 2024 · Polymer gels are usually used for crystal growth as the recovered crystals have better properties. Fast crystallization under nanoscale confinement holds great benefits, especially in polymer microgels as its tunable microstructures. This study demonstrated that ethyl vanillin can be quickly crystallized from carboxymethyl …
WebAbout this book. Since the discovery that polymer single crystals are composed of chain folded macromolecules in 1957, the crystallization of polymers has attracted considerable interest and still provides fascinating and fruitful areas of research. Only a few books have been fully devoted to the crystallization of polymers in the past. incorporate excel spreadsheet into wordWebJan 1, 2024 · Polymer Crystallization will remain a Wiley title but will be published and hosted by Hindawi and will benefit from Hindawi’s experience and expertise in publishing open access titles. Polymer Crystallization will continue to undergo a rigorous peer review process ensuring that quality remains high. Manuscripts published after January 1, 2024 ... incite go getter scholarshipWebThe 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 ... incorporate exercise into the programWebMar 4, 2015 · Polymer crystallization may be altered by surrounding the material in an environment containing organic solvents (a special case of environmentally induced … incite healthWebSep 3, 2004 · The mechanism of mass transport and the related crystallization in poly ... Solvent-induced crystallization can occur during the transport process in PET at low … incite hatred meaningWebApr 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, … incorporate dictionaryCrystallization 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… incite graphics