2005
DOI: 10.1021/ma052022h
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Solution Properties of 1,3-Cyclohexadiene Polymers by Laser Light Scattering and Small-Angle Neutron Scattering

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Cited by 17 publications
(14 citation statements)
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“…Taking into account that the Kuhn segment length of PCHD (90/10) block is higher than that of the PCHD (50/50) block, it was concluded that these differences between the two interaction parameters χ PS‐PCHD(50/50) and χ PS‐PCHD(90/10) originate only from enthalpic factors such as the z ‐effect (where z represents the number of segment–segment contacts per lattice area) . The same group reported also that for PS‐ b ‐PCHD (90/10) diblock copolymers with ϕ PS ∼ 0.45 there is a relatively small area, where the cylindrical morphology becomes more stable than the lamellar, when the conformational asymmetry parameter ε is increased and that the rigid semiflexible PCHD block (majority block) will form the core.…”
Section: Resultsmentioning
confidence: 98%
“…Taking into account that the Kuhn segment length of PCHD (90/10) block is higher than that of the PCHD (50/50) block, it was concluded that these differences between the two interaction parameters χ PS‐PCHD(50/50) and χ PS‐PCHD(90/10) originate only from enthalpic factors such as the z ‐effect (where z represents the number of segment–segment contacts per lattice area) . The same group reported also that for PS‐ b ‐PCHD (90/10) diblock copolymers with ϕ PS ∼ 0.45 there is a relatively small area, where the cylindrical morphology becomes more stable than the lamellar, when the conformational asymmetry parameter ε is increased and that the rigid semiflexible PCHD block (majority block) will form the core.…”
Section: Resultsmentioning
confidence: 98%
“…The [ η ] of a wormlike chain may be calculated from the touched‐bead wormlike chain model based on the following true[ηtrue]=ftrue(λL,λdBtrue)(λ2MnormalL) where L , λ −1 , and d B are the contour length, the Kuhn segment length, and the diameter of a bead, respectively. L is related to M w by L=Mw/ML, for which M L is the molar mass per unit contour length of the polymer chain.…”
Section: Resultsmentioning
confidence: 99%
“…At 120 C, the conductivity decreases by more than two orders of magnitude for XPCHD_SPCHD_H2 but less than two orders of magnitude for Nafion ® NRE-212, as RH decreases from 100 to 20%. As compared with Nafion ® , the stronger conductivity dependence on RH of XPCHD_SPCHD_H2 is suggested to result from its semi-rigid polymer backbone [17,18], which makes organization of sulfonic acid groups into contiguous structures to form continuous, hydrophilic, hydrogen-bonded proton conducting pathways more difficult. Due to its stronger conductivity dependence on hydration, XPCHD_SPCHD_H2 exhibits higher proton conductivity at 30 C than Nafion NRE-212 in the range of RH of 100 to 70%, the crossover point of the curves.…”
Section: Membrane Proton Conductivitymentioning
confidence: 99%