Stretching-quenching

PET/iPP The transcrystallites fabricated through a slit extrusion hot stretching-quenching process Li et al. 2004... 

Li Z-M, Yang W, Li L B, Xie B H, Huang R and Yang M B (2004) Morphology and nonisothermal crystallization of in situ microfibrillar poly(ethylene terephthalate)/polypropylene blend fabricated trough slit-extrusion, hot-stretch quenching, J Polym Sci Part B Polym Phys 42 374-385. 

Li et al. utilized another approach, melt extrusion-hot stretching-quenching , to prepare several MRCs such as PET/PE [9], PET/PP [3], PC/PE [10], PA/PE [11] and Poly(phenylene sulfide) (PPS)/PP [12] MRCs. The factors affecting structures, morphologies, mechanical, rheological and crystallization properties of the MRCs such as composite composition, hot stretch ratio and viscosity ratio, etc., have been studied in detail. This chapter briefly describes the preparation, structure and properties of MRCs obtained by this specific melt extrusion-hot stretching-quenching process. 

Microfibril reinforced polymer-polymer composites (MRCs) based on two thermodynamically nonmiscible thermoplastics with different melting temperatures (T ) are prepared through a melt extrusion-hot stretching-quenching process, during which the high-melt-temperature component as the dispersed phase in situ deforms into microfibrils. The post... 

From this view, the authors have used a new approach called melt extrusion-hot stretching-quenching to prepare two categories of CPC (isotropic and anisotropic CPC) based on in situ microfibril reinforced polymer-polymer composites. This chapter briefly describes our recent work on several conductive in situ microfibrillar reinforced composites via hot stretching. 

In the following sections, the authors have used melt extrusion-hot stretching-quenching to prepare two kinds of isotropic CPC CB/PET/PE with CB preferentially localized in the PET microfibrils (referred to as isotropic i-CB/PET/PE ), and CB/PET/PE with CB selectively localized on the surfaces of PET microfibrils (referred to as isotropic (>CB/PET/PE ). 

There exist a limited number of studies on the occurrence of transcrystaUinity in MFC. Li et al. [38,42,43] studied the crystal morphology of iPP/PET in situ MFC, prepared by a slit extrusion, hot stretching-quenching process, and foimd that transcrystallinity occurred aroimd the PET in situ microfibrils. The authors propose different nucleation mech-... 

Inspired by the intrinsic deformation nature of polymer melt, various proposals have been put forward to constmct particular structure in polymer blend, aiming at the achievement of excellent performance. One of the typical examples is the methodology of in situ micro/nanofibrillation, in which, under the process of melt extrusion-hot stretching-quenching, the spherical dispersion domains in situ deform into micro/nanofibrils, realizing the scalable achievement of in situ micro/nanofibrillar composites, accompanied with greatly improved mechanical... 

Nanofibrillation of Polymer Blends via "Melt Extrusion-Hot Stretching-Quenching ... 

F. 8.1 Schematic diagram depicting the melt extmsion-hot stretching-quenching process... 

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