نتایج جستجو برای: copolymerization

تعداد نتایج: 2777  

2014
Tao Xiang Ling-Ren Wang Lang Ma Zhi-Yuan Han Rui Wang Chong Cheng Yi Xia Hui Qin Chang-Sheng Zhao

Functional polymers bear specified chemical groups, and have specified physical, chemical, biological, pharmacological, or other uses. To adjust the properties while keeping material usage low, a method for direct synthesis of functional polymers is indispensable. Here we show that various functional polymers can be synthesized by in situ cross-linked polymerization/copolymerization. We demonst...

Journal: :Nippon kagaku zassi 1958

Journal: :The Journal of the Society of Chemical Industry, Japan 1970

2012
M. Wannaborworn B. Jongsomjit

Copolymerization of ethylene with 1-hexene was carried out using two ansa-fluorenyl titanium derivative complexes. The substituent effect on the catalytic activity, monomer reactivity ratio and polymer property was investigated. It was found that the presence of t-Bu groups on fluorenyl ring exhibited remarkable catalytic activity and produced polymer with high molecular weight. However, these ...

2003
Bernd Kappler Arno Tuchbreiter Daniel Faller Peter Liebetraut Werner Horbelt Jens Timmer Josef Honerkamp Rolf Mülhaupt

High-throughput development of catalysts, initiators, and polymeric materials combines automated parallel catalyst synthesis and automated polymerization reactors. The reactors can be additionally equipped with on-line monitoring (ReactIR from Mettler) based on ATR-FT-IR technique. This powerful tool has proven to be a very valuable probe for high-throughput experiments. During copolymerization...

2004
B. Alhamad J. A. Romagnoli V. G. Gomes

A detailed model was developed for the emulsion copolymerization of styrene and MMA to predict the evolution of the particle size distribution (PSD) and molecular weight distribution (MWD) over the entire range of monomer conversion. A system exhibiting zero-one kinetics was employed. The model was used to optimise the emulsion copolymerization process in order to maximize particle size polydis...

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