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1,4-dioxane is a six-membered cyclic ether with oxygen atoms at positions one and four, formula ${\mathrm{C}}_4{\mathrm{H}}_8{\mathrm{O}}_2$. It can adopt chair-like conformations analogous to those of cyclohexane.

Its ether oxygens can accept hydrogen bonds and coordinate suitable solutes. The positions of those oxygens distinguish it from other dioxane isomers, so the numerical prefix is part of its chemical identity.

For the polybutadiene chain in 1,4-dioxane, define $R_x$ from the negative end charge toward the positive one. The electric dipole energy is $-eE{R}_x$, so the force conjugate to end separation is $eE$, even though the two endpoint forces are opposite. Balancing it against the entropic spring force givesNumerically,The zero-field rms of just the $x$ component is $60/\sqrt{3}=34.6\mathrm{nm}$, a different comparison. The mean extension is still much smaller than the contour length $Na=6\mu \mathrm{m}$, consistent with the Gaussian ideal chain force law. This is an end-charged ideal polymer in an electric field; the direct endpoint Coulomb interaction is omitted as stipulated.