Stratiform β crystals in ultrahigh molecular weight polyethylene and β-nucleating agent-nucleated isotactic polypropylene at micro-injection molding condition

2015 ◽  
Vol 42 ◽  
pp. 135-143 ◽  
Author(s):  
Ming Jin ◽  
Renxi La ◽  
Yu Zhang ◽  
Kejun Liu ◽  
Xinpeng Li ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Injection Molding ◽  
Isotactic Polypropylene ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Nucleating Agent ◽  
Micro Injection Molding ◽  
Molding Condition ◽  
Ultrahigh Molecular Weight

Insert injection molding of low-density polyethylene single-polymer composites reinforced with ultrahigh-molecular-weight polyethylene fabric

2017 ◽  
Vol 31 (8) ◽  
pp. 1013-1028 ◽  
Author(s):  
Jian Wang ◽  
Dongjie Chen ◽  
Sui Wang ◽  
Ziran Du ◽  
Nannan Jiang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Injection Molding ◽  
Polymer Composites ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Woven Fabric ◽  
Low Density Polyethylene ◽  
Processing Temperature ◽  
Low Density ◽  
Injection Speed ◽  
Ultrahigh Molecular Weight

Low-density polyethylene single-polymer composites (SPCs) reinforced with sandwiched ultrahigh-molecular-weight polyethylene woven fabric were prepared by insert injection molding. The process combines aesthetic and processing advantages. A processing temperature window (135–155°C) of a very short cycle time (less than 30 s) could be realized. The mechanical properties and morphologies of the samples were evaluated. The results suggested that the polyethylene SPCs were prepared successfully with concurrent increases in flexural strength (∼57%), tensile strength (∼164%), and impact strength (∼69%). The effects of different processing parameters including the nozzle temperature, injection pressure, injection speed, and the holding time were discussed. Numerical simulation results were used in the analysis.

Unusual hierarchical structures of micro-injection molded isotactic polypropylene in presence of an in situ microfibrillar network and a β-nucleating agent

RSC Advances ◽  
2015 ◽  
Vol 5 (54) ◽  
pp. 43571-43580 ◽  
Author(s):  
Zhongguo Zhao ◽  
Qi Yang ◽  
Miqiu Kong ◽  
Dahang Tang ◽  
Qianying Chen ◽  
...  
Keyword(s):  
Injection Molding ◽  
Isotactic Polypropylene ◽  
Hierarchical Structures ◽  
Nucleating Agent ◽  
Morphological Development ◽  
Micro Injection Molding ◽  
Injection Molded

The morphological development of iPP in presence of an in situ microfibrillar network and a β-nucleating agent under micro-injection molding.

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