Solution polymerization of polybenzimidazole

2016 ◽  
Vol 54 (12) ◽  
pp. 1795-1802 ◽  
Author(s):  
Kayley J. Fishel ◽  
Alexander L. Gulledge ◽  
Andrew T. Pingitore ◽  
Jason P. Hoffman ◽  
Warren P. Steckle ◽  
...  
Keyword(s):  
Solution Polymerization

Preparation of Portland Cement Components by PVA Solution Polymerization

1998 ◽  
Author(s):  
Elizabeth A. Benson ◽  
S. J. Lee ◽  
W. M. Kriven
Keyword(s):  
Portland Cement ◽  
Solution Polymerization

Synthesis and Properties of Biodegradable Liquid Crystalline Poly(ester-Urethane)s Based on Poly(L-Lactic Acid)

2013 ◽  
Vol 652-654 ◽  
pp. 459-462
Author(s):  
Ya Tong Guo ◽  
Zhu Zheng ◽  
Zhen Qi Hou ◽  
Jie Du
Keyword(s):  
Phase Transition ◽  
Thermal Stability ◽  
Lactic Acid ◽  
Physical Properties ◽  
Liquid Crystalline ◽  
Degradation Rate ◽  
Hydrolytic Degradation ◽  
Hexamethylene Diisocyanate ◽  
Solution Polymerization ◽  
Phase Transition Temperatures

A series of biodegradable segmented liquid crystalline poly(ester-urethane)s were prepared by solution polymerization of poly(L-lactic acid) (PLLA), mesogenic diol prepolymer poly(butylene terephthaloyldioxy dibenzoates) (MD), and hexamethylene diisocyanate (HDI). The MD content was varied from 0 to 40 mol% so that the effects of the mesogen content on the thermal and physical properties, and hydrolytic degradation were examined respectively. It was found that introducing mesogens units could increase the thermal stability and the elastic properties, while reduced the phase transition temperatures and the hydrolytic degradation rate.

scholarly journals Highly exfoliated montmorillonite clay reinforced thermoplastic polyurethane elastomer:in situpreparation and efficient strengthening

RSC Advances ◽  
2019 ◽  
Vol 9 (15) ◽  
pp. 8184-8196 ◽  
Author(s):  
Jingshui Xu ◽  
Lihua Cheng ◽  
Zhong Zhang ◽  
Ling Zhang ◽  
Cen Xiong ◽  
...  
Keyword(s):  
Thermoplastic Polyurethane ◽  
Montmorillonite Clay ◽  
Solution Polymerization ◽  
Polyurethane Elastomers ◽  
Thermoplastic Polyurethane Elastomers ◽  
Mmt Clay ◽  
Polymerization Method

Highly exfoliated montmorillonite (MMT) clay reinforced thermoplastic polyurethane elastomers (TPUs) were prepared by anin situsolution polymerization method.

Influence of Regulator, Temperature and Monomer Proportion on the Microstructure and Sequence Distribution of Random Isoprene-Styrene Copolymer

2006 ◽  
Vol 11-12 ◽  
pp. 367-370
Author(s):  
Hua Dong Feng ◽  
Yu Xia Qi ◽  
Ming Yao ◽  
Xing Ying Zhang
Keyword(s):  
1H Nmr ◽  
Solution Polymerization ◽  
Sequence Distribution ◽  
Styrene Copolymer

The linear random isoprene-styrene copolymer (L-SIR) was prepared by solution polymerization with cyclohexane—n-hexane mixture as solvent and n-BuLi as initiator in the presence of the polar regulator—tetrahydrofuran (THF). Microstructures of L-SIR have been studied by 1H-NMR.

Microgels 1: Solution polymerization using vinyl monomers

1995 ◽  
Vol 93 (1) ◽  
pp. 293-300 ◽  
Author(s):  
Neil B. Graham ◽  
Carmel M.G. Hayes
Keyword(s):  
Vinyl Monomers ◽  
Solution Polymerization

Preparation and Water Absorbency of Superabsorbent Kaolin/PAA-AM Composite

2013 ◽  
Vol 634-638 ◽  
pp. 1968-1976 ◽  
Author(s):  
Shi Han Shen ◽  
Yu Yu Zhang ◽  
Tian Bin Li ◽  
Qing Le Zeng
Keyword(s):  
Composite Material ◽  
Complex Structure ◽  
Water Absorbency ◽  
Solution Polymerization ◽  
Mass Ratio ◽  
Reaction Conditions ◽  
Superabsorbent Composite ◽  
Optimum Reaction ◽  
The Fourier Transform ◽  
Composite Variables

In this paper, a novel superabsorbent composite material based on acrylic acid (AA), acrylic amide (AM) and inorganic kaolin was synthesized via solution polymerization in aqueous medium with N,N’-methylene bisacrylamide (MBA) as crosslinker and potassium persulfate (KPS) as initiator. The effects of water absorbency of the composite variables, such as neutralization, kaolin concentration and MBA concentration, on the water absorbency were systematically optimized. Evidence of compositing was obtained by a comparison of the Fourier transform infrared spectra of the initial reactants with that of the superabsorbent composites, and its complex structure was confirmed with scanning electron microscope. The water absorbing mechanism was also discussed. The results indicated that the superabsorbent composite material was successfully synthesized and the optimum reaction conditions were as follows: the neutralization degree was 80%, the dosage of kaolin, crosslinker and initiator were 4%, 0.11%, and 0.9% respectively and the mass ratio of AA and AM was 3∶2. The optimum absorbency of the superabsorbent composite material in distilled water could reach 815.6g/g.

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