Abstract
The melting and the crystallization of blends of ultra-high molecular weight polyethylene (UHMWPE) and polyethylene high density with normal molecular weight (NMWPE) are investigated by means of differential scanning calorimetry (DSC). Mixing the components at a temperature below the flow temperature of UHMWPE (215 °C) results in segregated melting and crystallization. The segregated melting and crystallization temperatures of both components do not depend on composition of the blend. The extreme enthalpy dependence on blend composition is explained in terms of mutual influence exhibited by the components with respect to each other. It is due to the inner stresses in nonflowing UHMWPE characterized with a lot of entangled tie molecules. Mixing the components above the flow temperature of UHMWPE results in only one peak of melting and crystallization respectively. Complete mixing and probably co-crystallization between the components takes place on mixing NMWPE with flowing UHMWPE.
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References
Nakajima N, Ibata J (1983) Japan Patent 57177035
Nakajima N, Ibata J (1983) Japan Patent 57177036
Nakajima N, Ibata J (1983) Japan Patent 57177037
Simeonov I, Nikolova Z, Komitov P, Naidenova K (1982) Bulgarian Patent 31868
Gantscheva T, Ianatschkowa I, Nikolowa Sl (1983) Plaste und Kautsch 30:79
Bhateja SK, Andrews EH (1983) Polym Eng and Sci 23:888
Mihailov M, Minkova L (1980) Comm Dep Chem, Bulg Acad Sci 13:363
Radenkov P, Nikolova Z (1977) Symposium volume “Polymers” Bulg Acad Sci
Karasev AN, Andreeva IN, Karaseva MG, Chepurko LA (1978) Vysokomol Soedin B 20:693
Mihailov M, Minkova L, Nedkov E, Kircheva R (1979) Makromol Chem 180:2351; Mihailov M, Minkova L (1981) Comm Dep Chem, Bulg Acad Sci 14:273
Mihailov M, Minkova L, Nedkov E, Sydorovich AV, Stadnik VP (1983) Vysokomol Soedin A 25:486; Mihailov M, Minkova L, Nedkov E, Kircheva R (1978) Comm Dep Chem, Bulg Acad Sci 11:286
Mihailov M, Minkova L, Nedkov E (1977) Compt Rend Bulg Acad Sci 10:1051
Kresteva M, Nedkov E, Radilova A (1985) Coll & Polym Sci 263:273
Kresteva M, Nedkov E, Sinigerska E, Krestev V (1982) J Macromol Sci B 21:383
Ulrich F, Price P (1976) J Appl Polym Sci 20:1095
Nedkov E, Kresteva M, Mihailov M, Todorova U (1982) J Macromol Sci B 21:327
Nedkov E, Kresteva M, Michailov M (1982) J Macromol Sci B 21:347
Kamide K, Fujii K (1968) Kobunshi Kagaku 25:155
Atanasov A, Nedkov E (1983) Bulg J Phys 10:561
Atanasov A, Nedkov E (1983) Bulg J Phys 10:569
Emanuel NM, Buchachenko AL (1982) Chimicheska physika starenia i stabilisazii polymerov, ed. “Nauka”, Moskow, p 152
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Minkova, L., Mihailov, M. A calorimetric study of normal high density and ultra-high molecular weight polyethylene blends. Colloid & Polymer Sci 265, 1–7 (1987). https://doi.org/10.1007/BF01422656
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DOI: https://doi.org/10.1007/BF01422656