Crystallization kinetics of polymer brushes with poly(ethylene oxide) side chains

2010 ◽  
Vol 48 (18) ◽  
pp. 1955-1959 ◽  
Author(s):  
Ying Zheng ◽  
Merlin L. Bruening ◽  
Gregory L. Baker
Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 648
Author(s):  
Xiangning Wen ◽  
Yunlan Su ◽  
Shaofan Li ◽  
Weilong Ju ◽  
Dujin Wang

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.


2007 ◽  
Vol 40 (23) ◽  
pp. 8212-8219 ◽  
Author(s):  
Ying Zheng ◽  
Merlin L. Bruening ◽  
Gregory L. Baker

Polymer ◽  
1977 ◽  
Vol 18 (11) ◽  
pp. 1095-1099 ◽  
Author(s):  
E. Riande ◽  
J.G. Fatou ◽  
J.C. Alcazar

2010 ◽  
Vol 43 (7) ◽  
pp. 3359-3364 ◽  
Author(s):  
Haopeng Wang ◽  
Jong K. Keum ◽  
Anne Hiltner ◽  
Eric Baer

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