Isothermal crystallization kinetics of silk fibroin fiber-reinforced poly(ε-caprolactone) biocomposites

2009 ◽  
Vol 58 (5) ◽  
pp. 530-537 ◽  
Author(s):  
Xiuying Qiao ◽  
Wei Li ◽  
Kang Sun ◽  
Shi Xu ◽  
Xiaodong Chen
RSC Advances ◽  
2017 ◽  
Vol 7 (73) ◽  
pp. 46014-46021 ◽  
Author(s):  
Xing Jin ◽  
Xie Chen ◽  
Qian Cheng ◽  
Naiwen Zhang ◽  
Shenyang Cai ◽  
...  

The addition of RF weakened the interaction between PLA chains and reduced the energy barrier of PLA during crystallization.


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.


2017 ◽  
Vol 48 (6) ◽  
pp. 2949-2960 ◽  
Author(s):  
Lejun Zhou ◽  
Huan Li ◽  
Wanlin Wang ◽  
Zhaoyang Wu ◽  
Jie Yu ◽  
...  

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