Crystalline composition and morphology in isotactic polypropylene pipe under combining effects of rotation extrusion and fibril β-nucleating Agent

2018 ◽  
Vol 25 (S1) ◽  
pp. E195-E202 ◽  
Author(s):  
Lin Pi ◽  
Min Nie ◽  
Qi Wang
Keyword(s):  
Isotactic Polypropylene ◽  
Nucleating Agent ◽  
Rotation Extrusion ◽  
Effects Of Rotation

Unusual Tuning of Mechanical Properties of Isotactic Polypropylene Using Counteraction of Shear Flow and β-Nucleating Agent on β-Form Nucleation

2009 ◽  
Vol 42 (12) ◽  
pp. 4343-4348 ◽  
Author(s):  
Yan-Hui Chen ◽  
Gan-Ji Zhong ◽  
Yan Wang ◽  
Zhong-Ming Li ◽  
Liangbin Li
Keyword(s):  
Mechanical Properties ◽  
Shear Flow ◽  
Isotactic Polypropylene ◽  
Nucleating Agent

A novel highly efficient β-nucleating agent for isotactic polypropylene

2011 ◽  
Vol 123 (1) ◽  
pp. 108-117 ◽  
Author(s):  
Shicheng Zhao ◽  
Na Xu ◽  
Zhong Xin ◽  
Changquan Jiang
Keyword(s):  
Isotactic Polypropylene ◽  
Nucleating Agent ◽  
Highly Efficient

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.

In situ generation of a self-dispersed β-nucleating agent with increased nucleation efficiency in isotactic polypropylene

Polymer ◽  
2018 ◽  
Vol 151 ◽  
pp. 84-91 ◽  
Author(s):  
Shicheng Zhao ◽  
Wei Qin ◽  
Zhong Xin ◽  
Shuai Zhou ◽  
Hanzhang Gong ◽  
...  
Keyword(s):  
Isotactic Polypropylene ◽  
Nucleating Agent ◽  
In Situ Generation
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