Formation and Reinforcing Effect of Epitaxial Oriented Crystallization of Polyethylene Induced by Self‐assembly Nucleating Agent under Stress

2021 ◽  
Author(s):  
Buyong Wu ◽  
Chen Kong ◽  
Yudong Cai ◽  
Lin Ye ◽  
Shangtao Chen ◽  
...  
Keyword(s):  
Self Assembly ◽  
Nucleating Agent ◽  
Reinforcing Effect ◽  
Oriented Crystallization

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

Controllable reinforcement of stiffness and toughness of polypropylene via thermally induced self-assembly of β-nucleating agent

2014 ◽  
Vol 131 (16) ◽  
pp. n/a-n/a ◽  
Author(s):  
Yijun Li ◽  
Xinyu Wen ◽  
Min Nie ◽  
Qi Wang
Keyword(s):  
Self Assembly ◽  
Nucleating Agent ◽  
Thermally Induced

Crystalline modification and morphology of polypropylene developed under the combined effects of montmorillonite and self-assembly β nucleating agent

2016 ◽  
Vol 135 ◽  
pp. 76-82 ◽  
Author(s):  
Shaohong Shi ◽  
Xiang Zhang ◽  
Yuansen Liu ◽  
Min Nie ◽  
Qi Wang
Keyword(s):  
Self Assembly ◽  
Nucleating Agent ◽  
Combined Effects ◽  
Crystalline Modification

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

Crystallization behavior of poly(lactic acid) with a self-assembly aryl amide nucleating agent probed by real-time infrared spectroscopy and X-ray diffraction

2017 ◽  
Vol 64 ◽  
pp. 12-19 ◽  
Author(s):  
Huanhuan Zhang ◽  
Songjie Wang ◽  
Shaoyuan Zhang ◽  
Ruixue Ma ◽  
Yaming Wang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Infrared Spectroscopy ◽  
Real Time ◽  
Self Assembly ◽  
Crystallization Behavior ◽  
Nucleating Agent ◽  
Poly Lactic Acid ◽  
X Ray Diffraction ◽  
X Ray

Accelerating shear-induced crystallization and enhancing crystal orientation of isotactic-polypropylene via nucleating agent self-assembly

Polymer ◽  
2018 ◽  
Vol 158 ◽  
pp. 213-222 ◽  
Author(s):  
Baobao Chang ◽  
Konrad Schneider ◽  
Bo Lu ◽  
Roland Vogel ◽  
Guoqiang Zheng ◽  
...  
Keyword(s):  
Isotactic Polypropylene ◽  
Self Assembly ◽  
Crystal Orientation ◽  
Nucleating Agent ◽  
Induced Crystallization

Effect of surfactant assisted β-nucleating agent self-assembly on the crystallization of polypropylene

Polymer ◽  
2019 ◽  
Vol 184 ◽  
pp. 121895 ◽  
Author(s):  
Chao Ding ◽  
Gao-Gao Wu ◽  
Ya Zhang ◽  
Yu Yang ◽  
Bo Yin ◽  
...  
Keyword(s):  
Self Assembly ◽  
Nucleating Agent ◽  
Surfactant Assisted
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