Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 542-58-5, is researched, Molecular C4H7ClO2, about Effect of branching on the thermal properties of novel branched poly(4-ethyleneoxy benzoate), the main research direction is hydroxyethoxybenzoate polyester preparation branching thermal property.Formula: C4H7ClO2.
Poly(4-ethyleneoxy benzoate) (PEOB) was synthesized by the self-condensation of Et 4-(2-hydroxyethoxy)benzoate (E4HEB) under transesterification conditions. Branched PEOB was prepared by the condensation of E4HEB with an AB2 monomer, Et 3,5-bis(2-hydroxyethoxy)benzoate (EBHEB), under similar conditions. Varying amounts of branching (0-50%) were introduced into the linear polymer by changes in the composition of the comonomers in the feed. The solution viscosity of the polymers indicated that they had reasonable mol. weights; the extent of branching in these copolymers was established from their 1H NMR spectra. Differential scanning calorimetry studies indicated that, as expected, the introduction of branching drastically affected the percent crystallinity of the copolymers (as seen from their ΔHm, the enthalpy of melting), and when the extent of the incorporation of the AB2 monomer exceeded 10 mol%, the copolymers were completely amorphous. The melting temperatures of the copolymers decreased with an increase in the branching content, whereas the peak crystallization temperature in quenched (amorphous) samples followed the exactly opposite trend. The glass-transition temperatures (Tg) of the branched copolymers first decreased at low extents of branching, passed through a min., and then increased to attain the Tg of the pure hyperbranched polymer of EBHEB.
Here is just a brief introduction to this compound(542-58-5)Formula: C4H7ClO2, more information about the compound(2-Chloroethyl acetate) is in the article, you can click the link below.