Synthesis and characterization of hyperbranched polyurethanes prepared from blocked isocyanate monomers by step-growth polymerization

1993 ◽  
Vol 26 (18) ◽  
pp. 4809-4813 ◽  
Author(s):  
Ralph Spindler ◽  
Jean M. J. Frechet
Keyword(s):  
Synthesis And Characterization ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Blocked Isocyanate

scholarly journals Synthesis and characterization of novel polytriazoleimides by CuAAC step-growth polymerization

2010 ◽  
Vol 42 (3) ◽  
pp. 216-222 ◽  
Author(s):  
Xiao'an Zhou ◽  
Liqiang Wan ◽  
Yanhong Hu ◽  
Yanpeng E ◽  
Farong Huang ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Step Growth ◽  
Step Growth Polymerization

scholarly journals Synthesis and Characterization of methyl Methacrylate Modified Poly (Ester-Amide) Resins from Melia Azedarach Seed Oil as Coating Material

2016 ◽  
Vol 13 (1) ◽  
pp. 50-56
Author(s):  
Sageer Ahamad ◽  
S. A. Ahmad ◽  
A. Hasnat
Keyword(s):  
Methyl Methacrylate ◽  
Seed Oil ◽  
Polymeric Materials ◽  
Melia Azedarach ◽  
Chemical Corrosion ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
The Cost ◽  
Edible Seed

Synthesis of polymeric materials from natural renewable resources has attracted a lot of attention of researcher throughout the world as they not only reduce the dependency on petrochemicals but also friendly to the environment. Utilization of non-traditional and non-edible vegetable oils in the synthesis of valuable polymeric materials solves the problem of waste disposal as well as bringing down the cost of end products. Melia azedrach seed oil (MASO), a non-traditional and non-edible seed oil is utilized for the synthesis of poly(ester-amide) (MAPEA) by the aminolysis with diethanolamine followed by step-growth polymerization with phthalicacid. To improve the performances and utility of the MAPEA,methyl methacrylate (MMA) classified as hard monomer in the literature of acrylate embedded to it in different phr to obtained methyl methacrylate modified poly (ester-amide) (MMMAPEA) resins. The MMMAPEA resins were characterized by physic-chemical analysis as per standard reported methods. The structural elucidation of the resin was carried out by spectral analyses. Physico-mechanical and chemical/corrosion resistance performances of the MMMAPEA resins were investigated for the optimization of MMA content.

1,4:3,6-Dianhydrohexitols: Original platform for the design of biobased polymers using robust, efficient, and orthogonal chemistry

2012 ◽  
Vol 85 (3) ◽  
pp. 511-520 ◽  
Author(s):  
Pascal Dimitrov Raytchev ◽  
Céline Besset ◽  
Etienne Fleury ◽  
Jean-Pierre Pascault ◽  
Julien Bernard ◽  
...  
Keyword(s):  
Polymer Materials ◽  
Structure Property ◽  
Materials Properties ◽  
Property Relationship ◽  
Biobased Polymers ◽  
Structure Property Relationship ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
The Impact

1,4:3,6-Dianhydrohexitols (DAHs) are nontoxic and sustainable diols that have been extensively applied as monomers for the preparation of polymer materials by step-growth polymerization processes. The presence of two reactive alcohol groups was exploited to design a library of symmetric and asymmetric stereocontrolled alkyne- and/or azide-functionalized AA/BB and AB monomers suitable for thermal or copper(I)-catalyzed azide-alkyne cycloaddition (TAAC and CuAAC). Step-growth polymerization of these monomers yielded a series of linear polytriazoles as well as partially biosourced networks using a combination of AB + A2B2 derivatives. Characterization of the resulting materials allowed for the establishment of a thorough structure–property relationship emphasizing the impact of monomer stereochemistry and cycloaddition regioselectivity on materials properties.

Synthesis and characterization of three different structures of polyacene quinone radical polymers

2016 ◽  
Vol 30 (1) ◽  
pp. 94-99 ◽  
Author(s):  
Wenfeng Guo ◽  
Xin Mao ◽  
Chengzhang Li ◽  
Jie Yang ◽  
Lirong Du ◽  
...  
Keyword(s):  
Gravimetric Analysis ◽  
Solution Polymerization ◽  
Thermal Gravimetric ◽  
X Ray Diffraction ◽  
X Ray ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
High Insulation ◽  
Lcr Meter

Three types of polyacene quinone radical (PAQR) polymers were synthesized by the step-growth polymerization of naphthalene, anthracene, or anthraquinone reacting with pyromellitic dianhydride via solution polymerization under a temperature gradient. Zinc chloride was used as the catalyst, and nitrobenzene was the solvent. The different structures of PAQR polymers were analyzed by infrared, X-ray diffraction, and scanning electron microscopy. The thermal properties of PAQR polymers were described by thermal gravimetric analysis, and the electrical performances were investigated by a precision LCR meter and a digital high insulation meter.

Preparation and characterization of novel main-chain azobenzene polymers via step-growth polymerization based on click chemistry

Polymer ◽  
2009 ◽  
Vol 50 (19) ◽  
pp. 4512-4519 ◽  
Author(s):  
Xiaoqiang Xue ◽  
Jian Zhu ◽  
Wei Zhang ◽  
Zhengbiao Zhang ◽  
Xiulin Zhu
Keyword(s):  
Click Chemistry ◽  
Main Chain ◽  
Step Growth ◽  
Step Growth Polymerization
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