Sentence examples for more naphthenic groups from inspiring English sources
On the other side, R2 contains more naphthenic groups.
The Hn contents of R1 and R2 were 22.32 and 35.17, illustrating that R2 contained more naphthenic groups.
The H n content of R1-MP-8h-PS and R2-MP-8h-PS was 0.98 and 3.72, implying that R2-MP-8h-PS contained more naphthenic groups.
The raw material R2 with higher aromaticity, more naphthenic groups and less alkyl side chain was easy to form a high-quality mesophase pitch with large-domain optical texture, high mesophase content and low softening point (243 °C).
The results show that naphthenic groups are involved in the stabilization process.
The reason may be that the hydrogen transfer reaction took place owing to the naphthenic groups which could produce macromolecular free radicals to restrain the thermal polycondensation reaction.
The large content of naphthenic groups leads to hydrogen transfer reaction which plays a role in easing the carbonizing reaction, so that the viscosity of the system is lowered and then the mesophase pitch molecules have enough time to rearrange.
But the influences of the alkyl side chains and naphthenic groups on the optical and molecular structures of mesophase pitch have not been studied systematically so far as we know.
The raw material R2 with higher aromaticity, more naphthenic structure and less alkyl side chains was easy to form mesophase pitch with large-domains optical texture, lower softening point and more ordered crystal structure.
Using this technique, many aspects of carbonaceous mesophase have been elucidated: constituents of soft mesophase have methyl and/or naphthenic groups whereas those of hard mesophase have no aliphatic groups.
