Terminal radicals are required for ending the reaction. There are three steps in this type of polymerization: initiation, propagation, and termination. During initiation, the monomer acquires an active site to become a free radical. The addition of initiators or other approaches such as absorption ...
First, the number of monomer repeat units in a polymer or the degree of polymerization, n, can be found by dividing the molecular weight by the monomer molecular weight. If a is the number of carbon-carbon bonds along the backbone of a single monomer, the total number of bonds in the ...
& Yu, L. Donor–acceptor porous conjugated polymers for photocatalytic hydrogen production: the importance of acceptor comonomer. Macromolecules 49, 6903–6909 (2016). Article CAS Google Scholar Yu, X. et al. Eosin Y-functionalized conjugated organic polymers for visible-light-driven CO2 reduction...
C–H/C–I direct arylation reactions for monomer synthesis and C–H/C–Br direct arylation polycondensation were investigated for the short-step synthesis of promising medium-bandgap polymers (PBDB-T) for OPV applications. Polycondensation and end-capping reactions using direct arylation have been est...
This technique was discovered by a South Korean chemist and hailed as a cure for smelly socks.(a)(i) Give the full structural formul a of the monomer that is used to make polymer A. [1](ii) Suggest the name of polymer A.[1(ii) The monomer in a(i) reacts with aqueous bromine....
35 The diagram shows the structure of a monomer used to make a polymer.CH3H2 C =C CH3What is the structure of the polymer? A AB HCH3H CH CH3 CH3CH。CH3I—C-C C一—C CC C—CH3CH3古C DCH3H CH3CH3CH CH。CH3I一C一C CH—C一C CI HCH3CH3H CH3CH3 相关知识点: 试题来源: ...
We recall the main results of two different theories for temperature (T) and monomer concentration (C) dependence of flexible polymer solutions, namely, the Edwards–Flory–Huggins theory and the critical theory where an analogy with critical phenomena is used. These results are then compared to ...
19、 chain polymer(元素高分子元素高分子)polysilicones ios ic h3c h3c h3c h3os ioc h3c h3392.2 nomenclaturepolymer nomenclature is complicated for a variety of reasons: most polymer names are based on the names of monomer (source-based system) iupac system is not widely used some polymer struct...
The diagrams contain a eutectic point that corresponds to the situation when the crystallization of TeCB out of its solution in a polyolefin is accompanied by the crystallization of monomer units of the macromolecules. As a result, the polymer acquires a gel structure with crystallites as ...
Figure 4. A virtual phase diagram of a blend of polycarbonate and syndiotactic poly(methyl methacrylate) obtained via annealing the blends for 2 h. The open and closed circles represent single- and two-phase regimes, respectively. The high-temperature single-phase regime is due to an interchange...