Abstract
The unperturbed dimension and temperature character of poly(dibenzyl itaconate)s (PDBzI) are studied by a revised rotational isomeric state (RIS) method. The improved formulas of the mean-square radius of gyration, deduced by the pseudo-stereochemical equilibrium approach, may be used to investigate the configurational-conformational properties of atactic polymers with large side groups [poly(itaconates) for instance]. The calculated results showed that poly(itaconates) have larger dimension of the molecule than other vinyl polymers. Comparison of the dimension between considering and without considering side groups showed that the effect of large side groups on the unperturbed dimension for short-chain polymers is more obvious than that of long-chain polymers and, if the dimension of side groups increases, the effect also increases. The dimension differences of PDBzI between short-chain and long-chain polymers are investigated by the relation of characteristic ratios and temperature coefficients with temperature. Moreover, the dependence between the temperature coefficients and the tacticity of chains shows that the temperature characters of the isotactic, syndiotactic and atactic PDBzI chains have remarkable difference.
Similar content being viewed by others
References
Alfonso, G.C., Yan, D.Y., Zhou, Z.P., 1993. Configurational-conformational statistics of atactic polypropylene. Polymer, 34(13):2830–2835. [doi:10.1016/0032-3861(93)90128-W]
Flory, P.J., Sundararajan, P.R., 1974. Configurational statistics of vinyl polymer chains. J. Am. Chem. Soc., 96(16): 5015–5024. [doi:10.1021/ja00823a001]
Flory, P.J., Yoon, D.Y., 1974. Moments and distribution function for polymer chains of finite length. 1. theory. Macromolecule, 61(12):5358–5365.
Ma, H.Z., Zhang, L.X., 1997. Effect of side group on mean-square radius of gyration of atactic poly(methyl methacrylate) chain. Polymer Journal, 29(12):1012–1015. [doi:10.1295/polymj.29.1012]
Ma, H.Z., Ye, G.X., 2006. Dimensions of atactic poly(α-methylstyrene) chain with side groups. Chinese Journal of Polymer Science, 24(1):87–93. [doi:10.1142/S0256767906001072]
Ma, H.Z., Wu, J.F., Xu, J.M., 1997. Unperturbed mean-square radius of gyration of atactic polystyrene chain with side groups. European Polymer Journal, 33(10–12):1813–1815. [doi:10.1016/S0014-3057(97)00032-3]
Ma, H.Z., Zhang, L.X., Xu, J.M., 2001. Dependence of intrinsic viscosity on tacticity of polystyrene. Acta Polymerica Sinica, 6:769–771 (in Chinese).
Osa, M., Yoshizaki, T., Yamakawa, H., 2000. Mean-square radius of gyration of oligo- and poly(α-methylstyrene)s. Macromolecules, 33(13):4828–4835. [doi:10.1021/ma000353i]
Saiz, E., Horta, A., Gargallo, L., Hernández-Fuentes, I., Radic, D., 1988. Dipole moment and conformational analysis of itaconate. Macromolecules, 21(6):1736–1740. [doi:10.1021/ma00184a034]
Sundararajan, P.R., 1986. Conformational analysis of poly(methyl methacrylate). Macromolecules, 19(2):415–421. [doi:10.1021/ma00156a031]
Sundararajan, P.R., Flory, P.J., 1974. Configurational characteristics of poly(methyl methacrylate). J. Am. Chem. Soc., 96(16):5025–5031. [doi:10.1021/ja00823a002]
Velickovic, J., Filipovic, J., 1984. Unperturbed dimensions of poly{bis(phenyl-n-alkyl) itaconates}. Macromolecules, 17(4):611–614. [doi:10.1021/ma00134a016]
Yamakawa, H., Yoshizaki, T., 2004. Contributions of short-rang and excluded-volume interactions to unperturbed polymer chain dimensions. J. Chem. Phys., 121(7):3295–3298. [doi:10.1063/1.1774155]
Yan, D.Y., Zhou, Z.P., 1999. Configurational-conformational statistics of stereoirregular poly(methyl methacrylate)s. Joural of Macromolecular Science-Physics, B38(3): 217–225.
Yazdani-Pedram, M., Gargallo, L., Radić, D., 1985a. Polymer conformation and viscometric behaviour—4. Characterization and conformational studies for poly(dibenzyl itaconate). European Polymer Journal, 21(5):461–465. [doi:10.1016/0014-3057(85)90125-9]
Yazdani-Pedram, M., Gargallo, L., Radić, D., 1985b. Polymer conformation and viscometric behaviour—5: Synthesis, characterization and conformational studies for poly(monobenzyl itaconate). European Polymer Journal, 21(8):707–710. [doi:10.1016/0014-3057(85)90110-7]
Zhou, Z.P., Abe, A., 2003. Effect of the pendany ester group orientations on the dipole moment of poly(alkyl acrylate) s. Macromolecules, 36(19):7366–7371. [doi:10.1021/ma0302863]
Zhou, Z.P., Abe, A., 2004. A RIS treatment of the mean-square dipole moment of PMMA chains in consideration of the pendany ester group orientations. Polymer, 45(4):1313–1320. [doi:10.1016/j.polymer.2003.03.001]
Zhou, Z.P., Yan, D.Y., 1995. Improved expression of the mean-square radius of gyration, 2 poly(1,1-disubstituted ethylene)s. Macromolecular Theory and Simulations, 4(1):155–164. [doi:10.1002/mats.1995.040040111]
Zhou, Z.P., Yan, D.Y., 2001. Configurational-conformational statistics of poly(ethylene-propylene)s. Journal of Macromolecular Science Part B-Physics, 40(2):231–237. [doi:10.1081/MB-100001808]
Author information
Authors and Affiliations
Corresponding author
Additional information
Project supported by the National Basic Research Program (973) of China (No. 10574109), the Zhejiang Provincial Science and Technology Department (No. 2005C24008), and the Natural Science Foundation of Zhejiang Province (No. Y604064), China
Rights and permissions
About this article
Cite this article
Ma, Hz., Ye, Gx. Unperturbed dimensions of atactic poly(dibenzyl itaconate)s. J. Zhejiang Univ. - Sci. A 8, 991–998 (2007). https://doi.org/10.1631/jzus.2007.A0991
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1631/jzus.2007.A0991