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Many polyalcohols can change from one crystal structure to another in solid state at certain temperatures. A lot of papers reported their phase transition enthalpy, transition temperatures, and phase diagrams. This paper investigates the relation between transition enthalpy and hydrogen bond for the NPG (Neopentylglycol) and PE (Pentaerythritol) binary system on the basis of infrared spectrum experimental data and calorimetric results. It is shown that in the binary system some of the associated hydrogen bonds become weaker and are easier to break up. When temperature rises to a certain value, the hydrogen bonds, which retain in the course of phase transformation from the phase of NPG in PE to the plastic phase, will break up and form the second endothermal peak on the calorimetric curve. The number of retained hydrogen bonds is larger for the binary system NPG/PE with higher NPG concentration, and as a result, the corresponding enthalpy for the second endothermal peak is larger. While the influence of NPG on the retained hydrogen bonds is larger for binary system NPG/PE with higher NPG concentration, and the corresponding temperature of the second endothermal peak is lower.
[1] Wang X W, Xu H H 2011 Acta Phys. Sin. 60 030507 (in Chinese)[王小伍, 徐海红 2011 60 030507]
[2] Feng H Y, Liu X D, He SH M, Wu K ZH, Zhang J L 1999 Acta Physico-Chimica Sinica 15 850 (in Chinese)[冯海燕, 刘晓地, 何书美, 武克忠, 张建玲 1999 物理化学学报 15 850]
[3] Sturz L, Witusiewicz V T, Hecht U, Rex S 2004 Journal of Crystal Growth 270 273
[4] Barrio M, Lo'pez D O, Ll J, Negrier T P, Haget Y 1996 Journal of Solid State Chemistry 124 29
[5] Dhanesh Chandra, Raja Chellappa, Wen-Ming Chien 2005 Journal of Physics and Chemistry of Solids 66 235
[6] Zhang ZH H, Han K, Li H P, Tang G, Wu Y X, Wang H T, Bai L 2008 Acta Phys. Sin. 57 3160 (in Chinese)[张兆慧, 韩奎, 李海鹏, 唐刚, 吴玉喜, 王洪涛, 白磊 2008 57 3160]
[7] Barrio M, Font J, Muntasell J, Navarro J, Ll Tamarit J 1998 Solar Energy Materials 18 109
[8] Ji Z H, Zeng X H, Cen J P, Tan M Q 2010 Acta Phys. Sin. 59 1219 (in Chinese)[季正华, 曾祥华, 岑洁萍, 谭明秋 2010 59 1219]
[9] Bettina Granzow 1996 Journal of Molecular Structure 381 127
[10] Benson D K, Burrows R W, Webb J D 1986 Solar Energy Materials 13 133
[11] Chen Z H, Chen C H L, Wen X L, Wen J 2008 Acta Phys. Sin. 57 6277 (in Chinese)[陈钊, 陈长乐, 温晓莉, 文军 2008 57 6277]
[12] Gu B, Zhang F S, Huang Y G, Fang X 2010 Chin. Phys. B 19 030101
[13] Font J, Muntasell J 1994 Materials Research Bulletin 29 1091
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[1] Wang X W, Xu H H 2011 Acta Phys. Sin. 60 030507 (in Chinese)[王小伍, 徐海红 2011 60 030507]
[2] Feng H Y, Liu X D, He SH M, Wu K ZH, Zhang J L 1999 Acta Physico-Chimica Sinica 15 850 (in Chinese)[冯海燕, 刘晓地, 何书美, 武克忠, 张建玲 1999 物理化学学报 15 850]
[3] Sturz L, Witusiewicz V T, Hecht U, Rex S 2004 Journal of Crystal Growth 270 273
[4] Barrio M, Lo'pez D O, Ll J, Negrier T P, Haget Y 1996 Journal of Solid State Chemistry 124 29
[5] Dhanesh Chandra, Raja Chellappa, Wen-Ming Chien 2005 Journal of Physics and Chemistry of Solids 66 235
[6] Zhang ZH H, Han K, Li H P, Tang G, Wu Y X, Wang H T, Bai L 2008 Acta Phys. Sin. 57 3160 (in Chinese)[张兆慧, 韩奎, 李海鹏, 唐刚, 吴玉喜, 王洪涛, 白磊 2008 57 3160]
[7] Barrio M, Font J, Muntasell J, Navarro J, Ll Tamarit J 1998 Solar Energy Materials 18 109
[8] Ji Z H, Zeng X H, Cen J P, Tan M Q 2010 Acta Phys. Sin. 59 1219 (in Chinese)[季正华, 曾祥华, 岑洁萍, 谭明秋 2010 59 1219]
[9] Bettina Granzow 1996 Journal of Molecular Structure 381 127
[10] Benson D K, Burrows R W, Webb J D 1986 Solar Energy Materials 13 133
[11] Chen Z H, Chen C H L, Wen X L, Wen J 2008 Acta Phys. Sin. 57 6277 (in Chinese)[陈钊, 陈长乐, 温晓莉, 文军 2008 57 6277]
[12] Gu B, Zhang F S, Huang Y G, Fang X 2010 Chin. Phys. B 19 030101
[13] Font J, Muntasell J 1994 Materials Research Bulletin 29 1091
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