A Comprehensive Review on Controlled Synthesis of Long-Chain Branched Polyolefins: Part 3, Characterization of Long-Chain Branched Polymers

2016 ◽  
Vol 11 (1) ◽  
pp. 1600012 ◽  
Author(s):  
Pingwei Liu ◽  
Weifeng Liu ◽  
Wen-Jun Wang ◽  
Bo-Geng Li ◽  
Shiping Zhu
Keyword(s):  
Branched Polymers ◽  
Controlled Synthesis ◽  
Comprehensive Review ◽  
Long Chain

scholarly journals Characterization of Long-chain Branched Polymers

Seikei-Kakou ◽  
2008 ◽  
Vol 20 (2) ◽  
pp. 90-93
Author(s):  
Masayuki Yamaguchi
Keyword(s):  
Branched Polymers ◽  
Long Chain

A Comprehensive Review on Controlled Synthesis of Long-Chain Branched Polyolefins: Part 1, Single Catalyst Systems

2016 ◽  
Vol 10 (3) ◽  
pp. 156-179 ◽  
Author(s):  
Pingwei Liu ◽  
Weifeng Liu ◽  
Wen-Jun Wang ◽  
Bo-Geng Li ◽  
Shiping Zhu
Keyword(s):  
Controlled Synthesis ◽  
Comprehensive Review ◽  
Catalyst Systems ◽  
Long Chain

scholarly journals Synthesis and Characterization of Partially Renewable Oleic Acid-Based Ionomers for Proton Exchange Membranes

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 130
Author(s):  
Carlos Corona-García ◽  
Alejandro Onchi ◽  
Arlette A. Santiago ◽  
Araceli Martínez ◽  
Daniella Esperanza Pacheco-Catalán ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Proton Conductivity ◽  
Electrochemical Impedance ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Molar Ratio ◽  
Aromatic Diamines ◽  
Chemical Structures ◽  
Long Chain

The future availability of synthetic polymers is compromised due to the continuous depletion of fossil reserves; thus, the quest for sustainable and eco-friendly specialty polymers is of the utmost importance to ensure our lifestyle. In this regard, this study reports on the use of oleic acid as a renewable source to develop new ionomers intended for proton exchange membranes. Firstly, the cross-metathesis of oleic acid was conducted to yield a renewable and unsaturated long-chain aliphatic dicarboxylic acid, which was further subjected to polycondensation reactions with two aromatic diamines, 4,4′-(hexafluoroisopropylidene)bis(p-phenyleneoxy)dianiline and 4,4′-diamino-2,2′-stilbenedisulfonic acid, as comonomers for the synthesis of a series of partially renewable aromatic-aliphatic polyamides with an increasing degree of sulfonation (DS). The polymer chemical structures were confirmed by Fourier transform infrared (FTIR) and nuclear magnetic resonance (1H, 13C, and 19F NMR) spectroscopy, which revealed that the DS was effectively tailored by adjusting the feed molar ratio of the diamines. Next, we performed a study involving the ion exchange capacity, the water uptake, and the proton conductivity in membranes prepared from these partially renewable long-chain polyamides, along with a thorough characterization of the thermomechanical and physical properties. The highest value of the proton conductivity determined by electrochemical impedance spectroscopy (EIS) was found to be 1.55 mS cm−1 at 30 °C after activation of the polymer membrane.

Synthesis and characterization of hydrophobic long-chain fatty acylated cellulose and its self-assembled nanoparticles

2012 ◽  
Vol 69 (4) ◽  
pp. 389-403 ◽  
Author(s):  
Yanzhu Guo ◽  
Xiaohui Wang ◽  
Dong Li ◽  
Hong Du ◽  
Xiaoying Wang ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Self Assembled ◽  
Long Chain
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