position£ºhome > news > details

C5 petroleum resin comonomer

author£ºadmin Date£º2016/12/15 17:47:45

The results show that the preparation of high quality C5 petroleum resin is not only limited to the content of the three olefins, but also needs to be improved by using monoolefins. The copolymerization of pentadiene with isopentene in a certain proportion gives a narrow molecular weight distribution, light, good solubility, low bromine value and good stability of the polymer products, this is because the heterogeneous tertiary olefins in the polymerization reaction plays a role in chain transfer, the formation of stable tert-carbon cations reason. It also has the effect of terminating the polymerization reaction because it captures the HCl produced by the contact of AlCl3 with piperylene, thereby slowing the promoter of HCl. The equation produces high molecular weight, poorly soluble polymers.

With this improvement, the quality of C5 petroleum resin to mediate monoolefins is a number of mono-olefins containing tertiary carbon atoms. The greater the content of these mono-olefins, the better the solubility of the resin. The lower the monoolefin content, the harder the resin, the higher the molecular weight, the more insoluble polymer components.

In addition, the cyclopentene in C5 acts similarly to the aromatic hydrocarbon solvent and promotes the production of a polymer having a high melting point and being soluble. Another kind of comonomer is terpene compounds, such as ¦Á-pinene, ¦Â-pinene, limonene and ¦Â-phellandrene, which can increase the viscosity of the resin without affecting the softening point of the resin. The double-ring structure of the pinene is opened to act as a chain transfer agent from the two tertiary carbenes. They are more effective in improving the solubility of the resin than 2-methyl-2-butene and the like. Terpenes in the proportion of resin polymer can account for 50%, this time can be called aliphatic hydrocarbon modified terpene resin.