Extended-chain lamellar packing of poly(3-butylthiophene) in single crystals

Polymer ◽  
2007 ◽  
Vol 48 (1) ◽  
pp. 31-34 ◽  
Author(s):  
Zhiyong Ma ◽  
Yanhou Geng ◽  
Donghang Yan
Keyword(s):  
Single Crystals ◽  
Extended Chain

Fracture and Deformation of Extended-Chain Crystals in Poly(ethylene Terephthalate)/Bisphenol-A Polycarbonate Blends Crystallized at High Pressure

2011 ◽  
Vol 214 ◽  
pp. 301-305
Author(s):  
Jun Lu ◽  
Jiao Jiao Tian ◽  
Dao Peng Zhang ◽  
Rui Huang
Keyword(s):  
High Pressure ◽  
Bisphenol A ◽  
Single Crystals ◽  
Ethylene Terephthalate ◽  
Morphological Observation ◽  
Bisphenol A Polycarbonate ◽  
Extended Chain ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Functional Components

With a combination of three-dimensional crystal ordering and long-chain molecular orientational ordering, the extended-chain crystals of polymers are ideal system for the studies on low-dimensional physics, and have potential applications as functional components. In this study, poly (ethylene terephthalate) / bisphenol-A polycarbonate (PET/BAPC) blend samples were prepared with solid phase forming technique under high pressure, and extended-chain single crystals with large c-axis thickness were formed within a relative short time. The fracture and deformation behaviors of the grownup crystals were investigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Morphological observation showed that most of the extended-chain crystals were endowed with perfect appearance after the sample fracture. However, there were still a few crystals fractured apart, along or perpendicularly to their c-axis direction, or with cohesive fracture surfaces. Fractured spherulites with extended-chain lamellae as substructures were also disclosed in extended-chain crystals with AFM. Furthermore, the parallel lamellae deformed and changed their striation direction during the crystal growth, as was observed on a kind of extended-chain crystals grown in a PET oligomer and BAPC blend (PETO/BAPC). This study may be instructive to the improvement of the separation technique of such single crystals, so as to hasten their real applications.

Lateral Growth of Extended-Chain Single Crystals of Vinylidene Fluoride and Trifluoroethylene Copolymers

1993 ◽  
Vol 32 (Part 1, No. 6A) ◽  
pp. 2780-2785 ◽  
Author(s):  
Masamichi Hikosaka ◽  
Katsuyuki Sakurai ◽  
Hiroji Ohigashi ◽  
Tomoyoshi Koizumi
Keyword(s):  
Single Crystals ◽  
Vinylidene Fluoride ◽  
Lateral Growth ◽  
Extended Chain

Growth of Bulky Extended Chain Single Crystals of Polyethylene

1981 ◽  
Vol 50 (2) ◽  
pp. 638-641 ◽  
Author(s):  
Masamichi Hikosaka ◽  
Shunpei Tamaki
Keyword(s):  
Single Crystals ◽  
Extended Chain

Morphology of Extended Chain Single Crystals of Vinylidene Fluoride and Trifluoroethylene Copolymers

1993 ◽  
Vol 32 (Part 1, No. 5A) ◽  
pp. 2029-2036 ◽  
Author(s):  
Masamichi Hikosaka ◽  
Katsuyuki Sakurai ◽  
Hiroji Ohigashi ◽  
Tomoyoshi Koizumi
Keyword(s):  
Single Crystals ◽  
Vinylidene Fluoride ◽  
Extended Chain

Role of Transient Metastable Hexagonal Phase in the Formation of Extended Chain Single Crystals of Vinylidene Fluoride and Trifluoroethylene Copolymers

1994 ◽  
Vol 33 (Part 1, No.1A) ◽  
pp. 214-219 ◽  
Author(s):  
Masamichi Hikosaka ◽  
Katsuyuki Sakurai ◽  
Hiroji Ohigashi ◽  
Andrew Keller
Keyword(s):  
Single Crystals ◽  
Vinylidene Fluoride ◽  
Hexagonal Phase ◽  
Extended Chain

The Microstructure of Shock-Synthesized Diamond

1967 ◽  
Vol 25 ◽  
pp. 324-325
Author(s):  
Lucien F. Trueb
Keyword(s):  
Single Crystals ◽  
Preferred Orientation ◽  
High Magnification ◽  
Texture Pattern ◽  
Shock Process ◽  
New Type ◽  
Diffraction Diagram

A new type of synthetic industrial diamond formed by an explosive shock process has been recently developed by the Du Pont Company. This material consists of a mixture of two basically different forms, as shown in Figure 1: relatively flat and compact aggregates of acicular crystallites, and single crystals in the form of irregular polyhedra with straight edges.Figure 2 is a high magnification micrograph typical for the fibrous aggregates; it shows that they are composed of bundles of crystallites 0.05-0.3 μ long and 0.02 μ. wide. The selected area diffraction diagram (insert in Figure 2) consists of a weak polycrystalline ring pattern and a strong texture pattern with arc reflections. The latter results from crystals having preferred orientation, which shows that in a given particle most fibrils have a similar orientation.

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