Effects of the Molecular Weight and Concentration of Polymer Additives, and Temperature on the Melt Crystallization Kinetics of a Small Drug Molecule

2010 ◽  
Vol 10 (8) ◽  
pp. 3585-3595 ◽  
Author(s):  
Umesh S. Kestur ◽  
Hoyoung Lee ◽  
Darlene Santiago ◽  
Carlos Rinaldi ◽  
You-Yeon Won ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Crystallization Kinetics ◽  
Polymer Additives ◽  
Melt Crystallization ◽  
Drug Molecule ◽  
Kinetics Of

scholarly journals Isothermal Crystallization Kinetics of Poly(ethylene oxide)/Poly(ethylene glycol)-g-silica Nanocomposites

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 648
Author(s):  
Xiangning Wen ◽  
Yunlan Su ◽  
Shaofan Li ◽  
Weilong Ju ◽  
Dujin Wang
Keyword(s):  
Molecular Weight ◽  
Ethylene Oxide ◽  
Crystallization Kinetics ◽  
Isothermal Crystallization ◽  
Crystallization Rate ◽  
Poly Ethylene Glycol ◽  
Isothermal Crystallization Kinetics ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Kinetics Of

In this work, the crystallization kinetics of poly(ethylene oxide) (PEO) matrix included with poly(ethylene glycol) (PEG) grafted silica (PEG-g-SiO2) nanoparticles and bare SiO2 were systematically investigated by differential scanning calorimetry (DSC) and polarized light optical microscopy (PLOM) method. PEG-g-SiO2 can significantly increase the crystallinity and crystallization temperature of PEO matrix under the non-isothermal crystallization process. Pronounced effects of PEG-g-SiO2 on the crystalline morphology and crystallization rate of PEO were further characterized by employing spherulitic morphological observation and isothermal crystallization kinetics analysis. In contrast to the bare SiO2, PEG-g-SiO2 can be well dispersed in PEO matrix at low P/N (P: Molecular weight of matrix chains, N: Molecular weight of grafted chains), which is a key factor to enhance the primary nucleation rate. In particular, we found that the addition of PEG-g-SiO2 slows the spherulitic growth fronts compared to the neat PEO. It is speculated that the interfacial structure of the grafted PEG plays a key role in the formation of nuclei sites, thus ultimately determines the crystallization behavior of PEO PNCs and enhances the overall crystallization rate of the PEO nanocomposites.

Molecular weight dependent of the crystallization kinetics of poly(vinylidene fluoride)

1992 ◽  
Vol 32 (17) ◽  
pp. 1300-1308 ◽  
Author(s):  
Sophie Roussel ◽  
Kathy Lynn McElroy ◽  
Lawrence H. Judovits
Keyword(s):  
Molecular Weight ◽  
Crystallization Kinetics ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride ◽  
Kinetics Of

A comparison study on the melt crystallization kinetics of long chain branched and linear isotactic polypropylenes

2008 ◽  
Vol 53 (2) ◽  
pp. 188-197 ◽  
Author(s):  
Wei Zeng ◽  
JiChun Liu ◽  
JunFeng Zhou ◽  
JinYong Dong ◽  
ShouKe Yan
Keyword(s):  
Crystallization Kinetics ◽  
Comparison Study ◽  
Melt Crystallization ◽  
Kinetics Of ◽  
Long Chain

scholarly journals Non-isothermal melt-crystallization kinetics of poly(trimethylene terephthalate)

2004 ◽  
Vol 23 (7) ◽  
pp. 817-826 ◽  
Author(s):  
Nattapol Apiwanthanakorn ◽  
Pitt Supaphol ◽  
Manit Nithitanakul
Keyword(s):  
Crystallization Kinetics ◽  
Melt Crystallization ◽  
Trimethylene Terephthalate ◽  
Kinetics Of
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