Poly , melting behavior

Thermoplasticity. High molecular weight poly(ethylene oxide) can be molded, extmded, or calendered by means of conventional thermoplastic processing equipment (13). Films of poly(ethylene oxide) can be produced by the blown-film extmsion process and, in addition to complete water solubiUty, have the typical physical properties shown in Table 3. Films of poly(ethylene oxide) tend to orient under stress, resulting in high strength in the draw direction. The physical properties, melting behavior, and crystallinity of drawn films have been studied by several researchers (14—17). 

Philips R.A., McKenna J.M., and Cooper S.L., Glass transition and melting behavior of poly(ether-ester) multihlock copol3miers with poly(ethyleneterephthalate) hard segments, J. Polym. Sci. Part B, 32, 791, 1994. 

Buchner, S Wisme, D. and Zachmann, H. G., Kinetics of crystallization and melting behavior of poly(ethylenenaphthalene-2,6-dicarboxylate), Polymer, 30, 480-488 (1989). 

The melt behavior of sulfonated polystyrene ionomers was studied by Lundberg and coworkers41. As was shown in the case of a sulfonated elastomer30, sulfonation of polystyrene leads to an increase in the melt viscosity (measured at 250 °C) of the SPS upon neutralization, indicating increased association of the sodium poly-(salt). A sudden jump of the melt viscosity occurs at the point of complete neutralization, where a critical concentration of Na polystyrenesulfonate is reached, apparently resulting in a sharp phase separation between the ionic and hydrophobic domains (Figure 5). 

Three different series of binary blends were prepared by mixing hydrogenated oligo (cyclopentadiene) (HOCP), isotactic polypropylene (iPP), and poly(l-butene) (PB-1), alternatively. The influence of the presence of HOCP, on the morphology, crystallization, melting behavior, and supermolecular structure of... 

Fig. 12.22. Infrared melting curves of the complexes formed between poly U and adenine (left) and poly U and 2-aminoadenine (right) under the conditions shown path length 23.8 /t. This figure shows the parallel melting behavior of the uridine band at 1657 cm and bands corresponding to of the two purines. (Howard et al., 19666.)...

Figure 10-12. Melting behavior of a poly(ethylene) as a function of the morphology and the rate of heating. L, Lamellar single crystals from solution D, dendrites obtained by shock cooling solutions Sq spherulites obtained by shock cooling melts under normal pressures Sc, spherulites produced by crystallization under normal pressures E, extended chain crystals obtained by crystallization from high molar mass Eh and low molar mass Em poly(ethylene) melts under high pressures (after B. Wunderlich).

SHE Shenoy, S.L., Fujiwara, T., and Wynne, K.J., Quantifying plasticization and melting behavior of poly(vinylidene fluoride) in supercritical CO2 utilizing a linear variable differential transformer. Macromolecules, 36, 3380, 2003. 

Padermshoke, A., Katsumoto, Y., Harumi, S., Ekgasit, S., Noda, I., Ozaki, Y. Melting behavior of poly(3-hydroxybu1yrate) investigated by two-dimensional infrared correlation spectroscopy. Spectrochim. Acta Part A Mol. Biomol. Spectrosc. 61, 541-550 (2005)... 

Kawai, X, Rahma, N., Matsuba, G. et al. (2007) Crystallization and melting behavior of poly (L-lactic acid). Macromolecules, 40, 9463-9469. 

Cao, D. and Wu, L. (2009) Poly(L-lactic acidj/sUicon dioxide nanocomposite prepared via the in situ melt polycondensation of L-lactic acid in the presence of acidic silica sol Isothermal crystallization and melting behaviors. Journal of Applied Polymer Science, 111, 1045-1050. 

Ke, T. and Sun, X. (2003) Melting behavior and crystallization kinetics of starch tmd poly(lactic add) composites. Journal of Applied Polymer Science, 89, 1203-1210. 

Wang, X., Zhou, J. and Li, L. (2007) Multiple melting behavior of poly(butylene succinate). European Polymer Journal, 43 (8), 3163-3170. 

Me K, Pang W, Wang Y, Lu F, Zhu Q (2005) Effects of specific bonding interactions in poly (8-caprolactone)/silica hybrid materials on optical transparency and melting behavior. Matra-... 

Liu Yongjian, Jin Yi., Dai Linsen, Bu Haishan, Luise Robert, R. (1999). Crys-talhzahon and Melting Behavior of Liquid Crystahine Copolyesters Based on Poly(ethyleneterephthalate). J. Polym. Sci. A, 37(3), 369-377. 

Yang HS, Yoon JS, Kim MN (2005) Dependence of biodegradability of plastics in compost on the shape of specimens. Polym Degrad Stab 87 131-135 Yasuniwa M, Tsubakihara S, Satou T, lura K (2005) Multiple melting behavior of poly(butylene succinate).II. Thermal analysis of isothermal crystallization and melting process. J Polym Sci B Polym Phys 43 2039-2047... 

Gao X, Hou WM, Zhou JJ, Li L, Zhao LQ. Relationships between the crystal structures and the multiple melting behaviors of poly(ethylene 2,6-naphthalate). Macromol Mater Eng 2004 289(2) 174-80. 

Ju MY, Chang EC. Multiple melting behavior of poly(butylene-2,6-naphthalate). Polymer 2001 42(11) 5037 5. 

Liu, S.L. and T.S. Chung. 2000. Crystallization and melting behavior of regioregular poly(3-dodecythiophene). Polymer 41 27SI. 

Zhao, Y, D. Keroack, G.X. Yuan, A. Massicotte, R. Hanna, and M. Leclerc. 1997. Melting behavior of poly(3-alkylthiophene)s with long alkyl side-chains. Macromol Chem Phys 198 1035. 

Causin, V., C. Marega, A. Marigo, L. Valentini, and J.M. Kenny. 2005. Crystallization and melting behavior of poly(3-butylthiophene), poly(3-octylthiophene), and poly(3-dodecylthiophene). Macromolecules 38 409. 

Kovacs AJ, Buckley CP (1975,1976) Melting Behavior of Low Molecular Weight Poly(ethylene oxide). I Extended Chain Crystals. Prog Colloid Polymer Sci 58 44—52 II. Folded Chain Crystals, Colloid Polymer Sci 254 695-715. 

Poly(oxymethylene), POM, is a polymer with well-known melting behavior [56]. Fibrous, extended chain crystals can be produced by crystallization during polymerization, as described in Figs. 3.104 and 3.105. These extended-chain crystals can superheat on melting due to their slow melting rate, as is also seen for extended-chain crystals of polyethylene in Fig. 6.21. The DSC melting endotherms in Fig. 6.92 start for all heating rates at about the same temperatures, but the peak- and melt-end... 

Cheng SZD, Wunderlich B. (1985) Glass Transition and Melting Behavior of Poly(ethylene-2,6-naphthalene Dicarboxylate). Macromolecules 21 789-797. 

Marand H, Alizadeh A, Farmer R, Desai R, Velikov V (2000) Influence of Stmctural and Topological Constraints on the Crystallization and Melting Behavior of Polymers. 2. Poly(arylene Ether Ether Ketone). Macromolecules 33 3392-34(B. 

Yasuniwa M., Tsubakihara S., Sugimoto Y., Nakafuku C., Thermal analysis of the double-melting behavior of poly(L-lactic acid), J. Polym. ScL, Polym. Phys., 42, 2004, 25-32. 

Papageorgiou, G.Z., Achilias, D.S., Karayannidis, G.P., Bikiaris, D.N., Roupakias, C., and Litsardakis, G. (2006) Step Scan TMDSC and High Rate DSC study of the multiple melting behavior of poly(l,3-propylene terephthalate). Fur. Polym. /., 42, 434-445. 

Papageorgiou, G.Z. and Bikiaris, D.N. (2005) Crystallization and melting behavior of three biodegradable poly(alkylene succinates). A comparative study. Polymer, 46, 12081-12092. 

Pan, P., Kai, W, Zhu, B., Dong, T, and Inoue, Y. (2007) Polymorphous crystallization and multiple melting behavior of poly(L-lactide) molecular weight dependence. Macromolecules, 40, 6898-6905,... 

Wu, L. and Hou, H. (2010) Isothermal cold crystallization and melting behaviors of poly(L-lactic acid)s prepared by melt polycondensation. J. Appl. Polym. Sci., 115, 702-708. 

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