Sensitive phase separation behavior of ultra-high molecular weight polyethylene in polybutene

2020 ◽  
Vol 81 ◽  
pp. 106243 ◽  
Author(s):  
Changlin Cao ◽  
Wei Jiang ◽  
Yu Lin ◽  
Xiaochuan Chen ◽  
Qingrong Qian ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Phase Separation ◽  
High Molecular Weight ◽  
Sensitive Phase ◽  
Phase Separation Behavior ◽  
Ultra High Molecular Weight ◽  
Separation Behavior

THE EFFECT OF POROGEN MOLECULAR WEIGHT ON PHASE SEPARATION BEHAVIOR IN POLY(METHYLSILSESQUIOXANE)/POROGEN HYBRIDS

2003 ◽  
Vol 406 (1) ◽  
pp. 195-202 ◽  
Author(s):  
Sung Kyu Min ◽  
Jae Man Park ◽  
Kitae Song ◽  
Hee-Woo Rhee ◽  
Moon Young Jin
Keyword(s):  
Molecular Weight ◽  
Phase Separation ◽  
Phase Separation Behavior ◽  
Separation Behavior

scholarly journals Extension induced phase separation and crystallization in semidilute solutions of ultra high molecular weight polyethylene

Polymer ◽  
2018 ◽  
Vol 136 ◽  
pp. 215-223 ◽  
Author(s):  
Sara Lindeblad Wingstrand ◽  
Luna Imperiali ◽  
Roman Stepanyan ◽  
Ole Hassager
Keyword(s):  
Molecular Weight ◽  
Phase Separation ◽  
High Molecular Weight ◽  
Semidilute Solutions ◽  
Ultra High Molecular Weight

Preparation of Ultra-High Molecular Weight Polyethylene Microporous Membranes via Thermally Induced Phase Separation

2012 ◽  
Vol 476-478 ◽  
pp. 2363-2367 ◽  
Author(s):  
Ling Ling Zhu ◽  
Zu Ming Hu ◽  
Jun Rong Yu ◽  
Guo Ping Tang ◽  
Lei Chen ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Phase Separation ◽  
High Molecular Weight ◽  
Diffusion Rate ◽  
Water Flux ◽  
Crystallization Rate ◽  
Microporous Membranes ◽  
Thermally Induced Phase Separation ◽  
Thermally Induced ◽  
Ultra High Molecular Weight

Ultra-high molecular weight polyethylene (UHMWPE) microporous membranes were fabricated via thermally induced phase separation (TIPS). Thermogravimetric analyzer was used to obtain the true concentration of films. To characterize the permeation property, the testing of water flux was carried out and it was found that with the increase of thickness, concentration and molecular weight, a decrease in water flux occurred. However, the water flux changed slightly when the thickness turned into 150μm and the molecular weight reached 4,000,000. Moreover, the pore structure investigated by Field emission scanning electron microscopy (FESEM) was consistent with the above phenomena. It is known that the pore size is affected by two factors: crystallization rate and the diffusion rate of diluent. The curves of the relative crystallinity (Xt) with time for the various films under the cooling rate of 10°C/min showed that the difference between crystallization rate of various membranes was small. So it was considered that the viscosity of system did greater influence on diffusion rate of diluent. In addition, the disparity between cloud points (Tcd) and crystallization temperature (T0) was not obvious, indicating that only solid-liquid phase separation could be observed in the range of cooling rates during the non-isothermal process.

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