Exploring supramolecular self-assembly of a bisamide nucleating agent in polypropylene melt: The roles of hydrogen bond and molecular conformation

Polymer ◽  
2016 ◽  
Vol 93 ◽  
pp. 123-131 ◽  
Author(s):  
Dingding Hu ◽  
Ge Wang ◽  
Jiachun Feng ◽  
Xiaoying Lu
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly ◽  
Molecular Conformation ◽  
Nucleating Agent ◽  
Polypropylene Melt

scholarly journals Crystalline modification of a rare earth nucleating agent for isotactic polypropylene based on its self-assembly

2018 ◽  
Vol 5 (5) ◽  
pp. 180247 ◽  
Author(s):  
Yuanming Zhang ◽  
Tingting Sun ◽  
Wei Jiang ◽  
Guangting Han
Keyword(s):  
Hydrogen Bond ◽  
Rare Earth ◽  
Isotactic Polypropylene ◽  
Self Assembly ◽  
Dendritic Structure ◽  
Nucleating Agent ◽  
The Self ◽  
Structure Evolution ◽  
Crystalline Modification ◽  
Assembly Structure

In this paper, the crystalline modification of a rare earth nucleating agent (WBG) for isotactic polypropylene (PP) based on its supramolecular self-assembly was investigated by differential scanning calorimetry, wide-angle X-ray diffraction and polarized optical microscopy. In addition, the relationship between the self-assembly structure of the nucleating agent and the crystalline structure, as well as the possible reason for the self-assembly behaviour, was further studied. The structure evolution of WBG showed that the self-assembly structure changed from a needle-like structure to a dendritic structure with increase in the content of WBG. When the content of WBG exceeded a critical value (0.4 wt%), it self-assembled into a strip structure. This revealed that the structure evolution of WBG contributed to the K β and the crystallization morphology of PP with different content of WBG. In addition, further studies implied that the behaviour of self-assembly was a liquid–solid transformation of WBG, followed by a liquid–liquid phase separation of molten isotactic PP and WBG. The formation of the self-assembly structure was based on the free molecules by hydrogen bond dissociation while being heated, followed by aggregation into another structure by hydrogen bond association while being cooled. Furthermore, self-assembly behaviour depends largely on the interaction between WBG themselves.

Oriented polypropylene cast films consisted of β-transcrystals induced by the nucleating agent self-assembly and its homogeneous membranes with high porosity

Polymer ◽  
2018 ◽  
Vol 151 ◽  
pp. 136-144 ◽  
Author(s):  
Gao-Gao Wu ◽  
Li-Yang Xu ◽  
Wen-Bo Chen ◽  
Chao Ding ◽  
Zheng-Ying Liu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Nucleating Agent ◽  
High Porosity ◽  
Cast Films ◽  
Oriented Polypropylene

Hydrogen bond-driven columnar self-assembly of electroluminescent D–A–D configured cyanopyridones

2018 ◽  
Vol 6 (27) ◽  
pp. 7385-7399 ◽  
Author(s):  
D. R. Vinayakumara ◽  
Hidayath Ulla ◽  
Sandeep Kumar ◽  
Anup Pandith ◽  
M. N. Satyanarayan ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly ◽  
Optoelectronic Properties

Flying bird-shaped cyanopyridone-based mesogens were designed and synthesized; their optoelectronic properties were studied in detail.

Hydrogen bond mediated self‐assembly of two diblock copolymers

2020 ◽  
Vol 58 (21) ◽  
pp. 3061-3068
Author(s):  
Eric R. Anderson ◽  
Vikram K. Daga ◽  
Samuel P. Gido ◽  
James J. Watkins
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly ◽  
Diblock Copolymers
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