Practical two‐step chain extension method to prepare sulfonated waterborne polyurethanes based on aliphatic diamine sulphonate

2020 ◽  
pp. 50353
Author(s):  
Jing Mou ◽  
Xiaojun Wang ◽  
Dongmei Yu ◽  
Shengpeng Wang ◽  
Yulong Miao ◽  
...  
Keyword(s):  
Chain Extension ◽  
Extension Method ◽  
Aliphatic Diamine ◽  
Waterborne Polyurethanes

The effect of chain extension method on the properties of polyurethane/SiO2 composites

2012 ◽  
Vol 35 ◽  
pp. 358-362 ◽  
Author(s):  
Zhiping Lv ◽  
Xiaoning Li ◽  
Xiang Yu
Keyword(s):  
Chain Extension ◽  
Extension Method

scholarly journals Synthesis of self-healing waterborne polyurethanes containing sulphonate groups

RSC Advances ◽  
2017 ◽  
Vol 7 (33) ◽  
pp. 20093-20100 ◽  
Author(s):  
Ye Xiao ◽  
Huihua Huang ◽  
Xiaohong Peng
Keyword(s):  
Phase Separation ◽  
Waterborne Polyurethane ◽  
Chain Extender ◽  
Self Healing ◽  
Ionic Interaction ◽  
Aliphatic Diamine ◽  
Waterborne Polyurethanes

An self-healing waterborne polyurethane is synthesized using the aliphatic diamine sulphonate as a hydrophilic chain-extender. The ionic interaction between the sulphonate groups and the micro-phase separation morphology realize self-healing.

A chain extension method for apocarotenoids; lycopene and lycophyll syntheses

2015 ◽  
Vol 572 ◽  
pp. 142-150 ◽  
Author(s):  
Jeongae Choi ◽  
Eun-Taek Oh ◽  
Sangho Koo
Keyword(s):  
Chain Extension ◽  
Extension Method ◽  
A Chain

Synthesis and characterization of novel post-chain extension flame retardant waterborne polyurethane

RSC Advances ◽  
2015 ◽  
Vol 5 (118) ◽  
pp. 97710-97719 ◽  
Author(s):  
Gang Wu ◽  
Jinqing Li ◽  
Chunpeng Chai ◽  
Zhen Ge ◽  
Jialun Lin ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Waterborne Polyurethane ◽  
Chain Extension ◽  
Synthesis And Characterization ◽  
Waterborne Polyurethanes ◽  
Phosphorus Containing

Flame-retardant waterborne polyurethanes with a phosphorus-containing flame retardant diamine (AWPUs) were synthesized and characterized by the method of post-chain extension technology.

Side Chain Extension of Polypropylene by Aliphatic Diamine and Isocyanate

2004 ◽  
Vol 214 (1) ◽  
pp. 289-298 ◽  
Author(s):  
K.Y. Kim ◽  
S.C. Kim
Keyword(s):  
Chain Extension ◽  
Side Chain ◽  
Aliphatic Diamine

scholarly journals Poly(lactic Acid): A Versatile Biobased Polymer for the Future with Multifunctional Properties—From Monomer Synthesis, Polymerization Techniques and Molecular Weight Increase to PLA Applications

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1822
Author(s):  
Evangelia Balla ◽  
Vasileios Daniilidis ◽  
Georgia Karlioti ◽  
Theocharis Kalamas ◽  
Myrika Stefanidou ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Lactic Acid ◽  
Chain Extension ◽  
Poly Lactic Acid ◽  
Plastic Pollution ◽  
Practical Applications ◽  
Decomposition Reactions ◽  
Melt Polycondensation ◽  
Polymerization Conditions ◽  
Molecular Weight Increase

Environmental problems, such as global warming and plastic pollution have forced researchers to investigate alternatives for conventional plastics. Poly(lactic acid) (PLA), one of the well-known eco-friendly biodegradables and biobased polyesters, has been studied extensively and is considered to be a promising substitute to petroleum-based polymers. This review gives an inclusive overview of the current research of lactic acid and lactide dimer techniques along with the production of PLA from its monomers. Melt polycondensation as well as ring opening polymerization techniques are discussed, and the effect of various catalysts and polymerization conditions is thoroughly presented. Reaction mechanisms are also reviewed. However, due to the competitive decomposition reactions, in the most cases low or medium molecular weight (MW) of PLA, not exceeding 20,000–50,000 g/mol, are prepared. For this reason, additional procedures such as solid state polycondensation (SSP) and chain extension (CE) reaching MW ranging from 80,000 up to 250,000 g/mol are extensively investigated here. Lastly, numerous practical applications of PLA in various fields of industry, technical challenges and limitations of PLA use as well as its future perspectives are also reported in this review.

scholarly journals Optimal Analysis of Transmission Lines Using Ant Colony-Improved Matter-Element Extension Method

2021 ◽  
Vol 1881 (3) ◽  
pp. 032010
Author(s):  
Yuntian Liu ◽  
Jingqi Sun
Keyword(s):  
Transmission Lines ◽  
Ant Colony ◽  
Extension Method ◽  
Optimal Analysis
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