ALBERT

Notes: Poly(oxydodecandioyloxy-1,4-phenylene-2-methylvinylene-1,4-phenylene) (1) was synthesized and partially characterized by differential scanning calorimetry and X-ray diffraction methods. The polymer shows a thermotropic liquid crystalline behavior. The X-ray diffraction spectrum of the anisotropic liquid is coherent with a nematic phase. Solid state polymorphism is also observed.

Notes: Semiflexible mesophasic polymers of the general formula \documentclass{article}\pagestyle{empty}\begin{document}$ % MathType!MTEF!2!1!+- % feaaeaart1ev0aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGabi4wayaaqa % Gaae4taiaab+eacaqGdbGaaeikaiaaboeacaqGibWaaSbaaSqaaiaa % bkdaaeqaaOGaaeykamaaBaaaleaacaWGUbGaeyOeI0IaaGOmaaqaba % GccqGHsislcaqGdbGaae4taiaab+eacqGHsislcaqGsbWaaWbaaSqa % beaacaaIXaaaaOGabiyxayaaqaWaaSbaaSqaaiaabIfaaeqaaOGaai % ilaiaad6gacqGH9aqpcaaI5aGaaiilaiaaigdacaaIXaGaaiilaiaa % igdacaaIZaGaaiilaiqacUfagaaeaiaab+eacaqGpbGaae4qaiaabI % cacaqGdbGaaeisamaaBaaaleaacaqGYaaabeaakiaacMcadaWgaaWc % baGaamOBaiabgkHiTiaaikdaaeqaaOGaaiylaiaaboeacaqGpbGaae % 4taiabgkHiTiaabkfadaahaaWcbeqaaiaaikdaaaGcceGGDbGbaaba % daWgaaWcbaGaaeiwaaqabaGccaGGSaGaamOBaiabg2da9iaaiMdaca % GGSaGaaGymaiaaigdacaGGSaGaaGymaiaaiodacaGGSaGaaGymaiaa % isdacaGGSaaaaa!6CDE! \rlap{--} [{\rm OOC(CH}_{\rm 2} {\rm )}_{n - 2} - {\rm COO} - {\rm R}^1 \rlap{--} ]_{\rm X} ,n = 9,11,13,\rlap{--} [{\rm OOC(CH}_{\rm 2} )_{n - 2} - {\rm COO} - {\rm R}^2 \rlap{--} ]_{\rm X} ,n = 9,11,13,14, $\end{document} and \documentclass{article}\pagestyle{empty}\begin{document}$ % MathType!MTEF!2!1!+- % feaaeaart1ev0aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGabi4wayaaqa % Gaae4taiaab+eacaqGdbGaae4taiabgkHiTiaabIcacaqGdbGaaeis % amaaBaaaleaacaqGYaaabeaakiaabMcadaWgaaWcbaGaamOBaiabgk % HiTiaaisdaaeqaaOGaeyOeI0Iaae4taiaaboeacaqGpbGaae4taiab % gkHiTiaabkfadaahaaWcbeqaaiaaikdaaaGcceGGDbGbaabadaWgaa % WcbaGaaeiwaaqabaGccaGGSaGaamOBaiabg2da9iaaiMdacaGGSaGa % aGymaiaaigdacaGGSaGaaGymaiaaiodacaGGSaaaaa!5300! \rlap{--} [{\rm OOCO} - {\rm (CH}_{\rm 2} {\rm )}_{n - 4} - {\rm OCOO} - {\rm R}^2 \rlap{--} ]_{\rm X} ,n = 9,11,13, $\end{document} where \documentclass{article}\pagestyle{empty}\begin{document}$ % MathType!MTEF!2!1!+- % feaaeaart1ev0aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaeOuamaaCa % aaleqabaGaaeymaaaakiabg2da9iabgkHiTiaaboeadaWgaaWcbaGa % aeOnaaqabaGccaqGibWaaSbaaSqaaiaabwdaaeqaaOGaeyOeI0Iaae % 4qaiaacIcacaqGdbGaaeisamaaBaaaleaacaaIZaaabeaakiaacMca % cqGH9aqpcaqGdbGaaeisaiabgkHiTiaaboeadaWgaaWcbaGaaGOnaa % qabaGccaqGibWaaSbaaSqaaiaaiwdaaeqaaOGaeyOeI0caaa!4A87! {\rm R}^{\rm 1} = - {\rm C}_{\rm 6} {\rm H}_{\rm 5} - {\rm C}({\rm CH}_3 ) = {\rm CH} - {\rm C}_6 {\rm H}_5 - $\end{document} and \documentclass{article}\pagestyle{empty}\begin{document}$ % MathType!MTEF!2!1!+- % feaaeaart1ev0aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaeOuamaaCa % aaleqabaGaaeOmaaaakiabg2da9iaaboeadaWgaaWcbaGaaeOnaaqa % baGccaqGibWaaSbaaSqaaiaabwdaaeqaaOGaeyOeI0Iaae4qaiaacI % cacaqGdbGaaeisamaaBaaaleaacaaIZaaabeaakiaacMcacqGH9aqp % caqGobGaeyOeI0IaaeOtaiabg2da9iaacIcacaqGdbGaaeisamaaBa % aaleaacaaIZaaabeaakiaacMcacaqGdbGaeyOeI0Iaae4qamaaBaaa % leaacaaI2aaabeaakiaabIeadaWgaaWcbaGaaGynaaqabaGccqGHsi % slaaa!5042! {\rm R}^{\rm 2} = {\rm C}_{\rm 6} {\rm H}_{\rm 5} - {\rm C}({\rm CH}_3 ) = {\rm N} - {\rm N} = ({\rm CH}_3 ){\rm C} - {\rm C}_6 {\rm H}_5 - $\end{document} are prepared and their solid and liquid crystalline behaviour examined and compared to that of the corresponding homologues with n even. Evidence is given of relevant odd-even effects in the thermodynamic parameters of the clearing transition. The conclusion is drawn in favour of an anisotropic structuration also of the flexible parts of the polymer chain in the liquid crystal phase.

Notes: The polymorphic behaviour of polymers \documentclass{article}\pagestyle{empty}\begin{document}$% MathType!MTEF!2!1!+- % feaaeaart1ev0aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGabeikayaaqa % Gaae4taiaab+eacaqGdbGaeyOeI0IaaeikaiaaboeacaqGibWaaSba % aSqaaiaabkdaaeqaaOGaaeykamaaBaaaleaacaqGUbGaaeylaiaabk % daaeqaaOGaeyOeI0Iaae4qaiaab+eacaqGpbGaeyOeI0Iaae4qamaa % BaaaleaacaqG2aaabeaakiaabIeadaWgaaWcbaGaaeinaaqabaGccq % GHsislcaqGdbGaaeikaiaaboeacaqGibWaaSbaaSqaaiaabodaaeqa % aOGaaeykaiaab2dacaqGdbGaaeisaiabgkHiTiaaboeadaWgaaWcba % GaaeOnaaqabaGccaqGibWaaSbaaSqaaiaabsdaaeqaaOGabeykayaa % qaWaaSbaaSqaaiaabIfaaeqaaaaa!560E! {\rm \rlap{--} (OOC} - {\rm (CH}_{\rm 2} {\rm )}_{{\rm n - 2}} - {\rm COO} - {\rm C}_{\rm 6} {\rm H}_{\rm 4} - {\rm C(CH}_{\rm 3} {\rm ) = CH} - {\rm C}_{\rm 6} {\rm H}_{\rm 4} {\rm \rlap{--} )}_{\rm X} $\end{document}(n = 8, 10) has been investigated. They show thermotropic, mesophasic properties with a nematic structure. Both polymers exhibit a multiple solid state polymorphism which is a function of the temperature and of their thermal history.