scholarly journals Interfacial Effects on the Spherulitic Morphology of Isotactic Polystyrene Thin Films on Liquid Substrates

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Takashi Sasaki ◽  
Masaaki Nakagiri ◽  
Satoshi Irie
Keyword(s):  
Thin Films ◽  
Nucleation Rate ◽  
Silicone Oil ◽  
Cold Crystallization ◽  
Number Density ◽  
Interfacial Effects ◽  
Isotactic Polystyrene ◽  
Primary Nucleation ◽  
Atactic Polystyrene ◽  
Spherulite Morphology

The influence of interfaces on the morphology of flat spherulites of isotactic polystyrene (iPS) grown in thin films on liquid substrates was investigated. Amorphous iPS thin films spin-cast from a solution were annealed for cold crystallization on glycerol and silicone oil (nonsolvents for iPS). The number density of grown spherulites was revealed to be higher on the glycerol substrate than on the silicone oil substrate. This implies that the primary nucleation rate of crystallization is greater at the iPS/glycerol interface than at the iPS/silicone oil interface. The results may be consistent with the previous findings that concern the molecular interaction between atactic polystyrene and nonsolvents at the interface. In some cases, holes were formed in the thin films during the cold crystallization due to dewetting, which also significantly affect the spherulite morphology via, for example, transcrystallization.

Growth behavior and surface morphology of Ag rough thin films deposited on silicone oil surfaces

1999 ◽  
Vol 342 (1-2) ◽  
pp. 30-34 ◽  
Author(s):  
Chun-Mu Feng ◽  
Hong-Liang Ge ◽  
Miao-Rong Tong ◽  
Gao-Xiang Ye ◽  
Zheng-Kuan Jiao
Keyword(s):  
Thin Films ◽  
Surface Morphology ◽  
Silicone Oil ◽  
Growth Behavior

Nucleation And Growth of Yttria-Stabilized Zirconia Thin Films Using Combustion Chemical Vapor Deposition

2002 ◽  
Vol 756 ◽  
Author(s):  
Zhigang Xu ◽  
Jag Sankar ◽  
Sergey Yarmolenko ◽  
Qiuming Wei
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Chemical Vapor Deposition ◽  
Nucleation Rate ◽  
Vapor Deposition ◽  
Liquid Fuel ◽  
Structural Evolution ◽  
Chemical Vapor ◽  
Total Metal ◽  
Vapor Deposition Technique

ABSTRACTLiquid fuel combustion chemical vapor deposition technique was successfully used for YSZ thin film processing. The nucleation rates were obtained for the samples processed at different temperatures and total-metal-concentrations in the liquid fuel. An optimum substrate temperature was found for the highest nucleation rate. The nucleation rate was increased with the total-metal-concentration. Structural evolution of the thin film in the early processing stage was studied with regard to the formation of nuclei, crystallites and final crystals on the films. The films were found to be affected by high temperature annealing. The crystals and the thin films were characterized with scanning electron microscopy.

Crystallization of Pentaerythritol I. Solubility, Density and Metastable Zone Width

1994 ◽  
Vol 59 (6) ◽  
pp. 1261-1269 ◽  
Author(s):  
Miloslav Karel ◽  
Jaroslav Nývlt ◽  
Angelo Chianese
Keyword(s):  
Aqueous Solutions ◽  
Nucleation Rate ◽  
Laboratory Experiments ◽  
Metastable Zone Width ◽  
Zone Width ◽  
Kinetics Of Crystallization ◽  
Primary Nucleation ◽  
Metastable Zone ◽  
Width Measurements ◽  
Kinetics Of

Solubility of pentaerythritol in water has been determined using literature data, the polythermal method and the dry residue method. Densities of its aqueous solutions have been measured using a pycnometer. Kinetics of crystallization of the pentaerythritol has been determined in laboratory experiments. In this paper, metastable zone width measurements have been employed for the assessment of the primary nucleation rate.

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