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Many polyalcohols will change from one crystal structure to another at certain temperatures. A lot of works had reported their phase change enthalpy, phase change temperature and phase diagram. It is taken that their phase change enthalpy must be related to their hydrogen bond. This article investigated quantitatively the relation between phase change enthalpy and hydrogen bond of NPG (neopentylglycol), PG (pentaglycerino) and PE (pentaerythritol) on the basis of infrared spectrum experimental data and calorimetric results. It was shown that before phase change, all the —OH are associated and as a result NPG, PG and PE form layer structure. After phase change, NPG, PG and PE move along the layer and as a result some hadrogen bonds break. Therefore the phase change enthalpy equals the energy used to break hydrogen plus the energy used to increase the vibration frequency of other still associated —OH.
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Keywords:
- solid—solid phase change /
- phase change enthalpy /
- hydrogen bond /
- infrared spectrum
[1] Barrio M, Font J, Muntasell J, Navarro J, Tamarit J L 1998 Solar Energy Materials 18 109
[2] Barrio M, López D O, Tamarit J Ll, Negrier P, Haget Y 1996 Journal of Solid State Chemistry 124 29
[3] Dhanesh Chandra, Raja Chellappa, Wen-Ming Chien 2005 Journal of Physics and Chemistry of Solids 66 235
[4] 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 物理学报 59 1219]
[5] Benson D K, Burrows R W, Webb J D 1986 Solar Energy Materials 13 133
[6] Bettina Granzow 1996 Journal of Molecular Structure 381 127
[7] Feng H Y, Liu X D, He S M, Wu K Z, 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]
[8] Zhang Z 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 物理学报 57 3160]
[9] Chen Z H, Chen C 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 物理学报 57 6277]
[10] Gu B, Zhang F Sh, Huang Y G, Fang X 2010 Chin. Phys. B 19 036101-66
[11] Font J, Muntasell J 1994 Materials Research Bulletin 29 1091
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[1] Barrio M, Font J, Muntasell J, Navarro J, Tamarit J L 1998 Solar Energy Materials 18 109
[2] Barrio M, López D O, Tamarit J Ll, Negrier P, Haget Y 1996 Journal of Solid State Chemistry 124 29
[3] Dhanesh Chandra, Raja Chellappa, Wen-Ming Chien 2005 Journal of Physics and Chemistry of Solids 66 235
[4] 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 物理学报 59 1219]
[5] Benson D K, Burrows R W, Webb J D 1986 Solar Energy Materials 13 133
[6] Bettina Granzow 1996 Journal of Molecular Structure 381 127
[7] Feng H Y, Liu X D, He S M, Wu K Z, 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]
[8] Zhang Z 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 物理学报 57 3160]
[9] Chen Z H, Chen C 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 物理学报 57 6277]
[10] Gu B, Zhang F Sh, Huang Y G, Fang X 2010 Chin. Phys. B 19 036101-66
[11] Font J, Muntasell J 1994 Materials Research Bulletin 29 1091
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