Journal ArticleDOI
AFM study of lamellar thickness distributions in high temperature melt-crystallization of β-polypropylene
TLDR
In this paper, atomic force microscopy (AFM) was used to study the lamellar thickness and its distribution in the β modification of isotactic polypropylene-(β-iPP) crystallized from the melt at high temperatures.Abstract:
Atomic force microscopy (AFM) was used to study the lamellar thickness and its distribution in the β modification of isotactic polypropylene-(β-iPP) crystallized from the melt at high temperatures. Measurements were performed on lamellae oriented both flat-on and edge-on with respect to the examined surface. Average lamellar thickness was found to be dependent not only on the crystallization temperature, but also on factors such as nucleation density and isothermal lamellar thickening. The limitations and advantages of the AFM technique for evaluation of lamellar thickness are discussed.read more
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Journal ArticleDOI
β-MODIFICATION OF ISOTACTIC POLYPROPYLENE: PREPARATION, STRUCTURE, PROCESSING, PROPERTIES, AND APPLICATION
TL;DR: In this article, a review of the methods of preparation and formation of supermolecular structures in quiescent and sheared melts and the properties of the β-modification of isotactic polypropylene (β-iPP) are reviewed.
Journal ArticleDOI
Influence of Annealing on Microstructure and Mechanical Properties of Isotactic Polypropylene with β-Phase Nucleating Agent
TL;DR: In this article, the microstructure and mechanical properties of β-nucleated iPP before and after being annealed at different temperatures (90−160 °C) have been analyzed.
Journal ArticleDOI
Direct Observation of Growth of Lamellae and Spherulites of a Semicrystalline Polymer by AFM
TL;DR: In this paper, the growth process of spherulites was studied using an atomic force microscope at 25 ± 1 °C and the phase shift measured at the tip of growing lamellae is lower than the phase shifts of the other regions of the growing lamella.
Journal ArticleDOI
Formation of cylindrite structures in shear-induced crystallization of isotactic polypropylene at low shear rate
Chenggui Zhang,Haiqing Hu,Xiaohong Wang,Yonghua Yao,Xia Dong,Dujin Wang,Zhigang Wang,Charles C. Han +7 more
TL;DR: In this paper, the cylindrite core of isotactic polypropylene (iPP) at low shear rate and low temperature was investigated by in situ optical microscopy, time-resolved small-angle light scattering (SALS) and ex situ atomic force microscopy (AFM).
Reference EntryDOI
Scanning Force Microscopy
TL;DR: In this article, the application of scanning force microscopy to polymers is discussed based on a selection of topics covering the whole breadth from topography imaging to mapping of surface properties and studies of dynamic processes in real time.