Crystallization of hard segment domains with the presence of butane for microcellular thermoplastic polyurethane foams

Autor:	S.H. Mahmood, Chul B. Park, Mohammadreza Nofar, Nemat Hossieny, Mohamad Reza Barzegari
Rok vydání:	2014
Předmět:	Materials science Polymers and Plastics Vapor pressure Organic Chemistry Plastics extrusion Nucleation Butane law.invention chemistry.chemical_compound Boiling point Thermoplastic polyurethane chemistry Compounding law Materials Chemistry Composite material Crystallization
Zdroj:	Polymer. 55:651-662
ISSN:	0032-3861
Popis:	This paper presents the effects of dissolved butane on the crystallization of hard segment (HS) and its effects on enhancement of cell nucleation to manufacture microcellular thermoplastic polyurethane foams (TPU). The TPU samples were first reprocessed by melt compounding through a twin-screw extruder. A broad distribution of HS domains was generated after this processing, including some perfected HS nano-crystals with a higher melting temperature. In addition to the processing effect, the saturation temperature and the plasticizing butane significantly induced a larger number of HS crystalline domains. Consequently, cell nucleation was significantly promoted in the vicinity of the largely distributed HS crystalline domains over a wider saturation temperature range of 150 °C–170 °C at a saturation pressure of 55 bar.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cea183dba8750b35a9e336954705921e https://doi.org/10.1016/j.polymer.2013.12.028 Zobrazit plný text záznamu Full Text from ScienceDirect