Effect of Postdrawing Temperature on Structure, Morphology, and Mechanical Properties of Melt-Spun Isotactic Polypropylene Tapes

2005 ◽  
Vol 38 (26) ◽  
pp. 10678-10685 ◽  
Author(s):  
Joachim Loos ◽  
Tilo Schimanski
Keyword(s):  
Mechanical Properties ◽  
Isotactic Polypropylene ◽  
Structure Morphology ◽  
Melt Spun ◽  
Morphology And Mechanical Properties

Morphology and mechanical properties of transcrystalline isotactic polypropylene

e-Polymers ◽  
2003 ◽  
Vol 3 (1) ◽  
Author(s):  
Koh-hei Nitta ◽  
Yoshikazu Yamamoto
Keyword(s):  
Mechanical Properties ◽  
Isotactic Polypropylene ◽  
Mechanical Energy ◽  
Supermolecular Structure ◽  
The Other ◽  
Morphological Properties ◽  
Spherulitic Morphology ◽  
Other Hand ◽  
Morphology And Mechanical Properties ◽  
Yielding Process

Abstract We examined mechanical and morphological properties of fully transcrystalline polypropylene grown from the surface of poly(tetrafluoroethylene) sheets. Comparison of mechanical properties between transcrystalline and spherulitic polypropylenes demonstrated that Young’s modulus is dependent on the crystallinity and independent of the supermolecular structure. On the other hand, the mechanical yielding process was predominantly affected by the supermolecular structure, and the mechanical energy required for yielding of transcrystalline sheets was greater than that of the spherulitic morphology. In addition, it was found that mechanical necking is required for the alignment of lamellae in the stretching direction. This means that the unfolding process of lamellae orienting in the stretching direction is associated with necking and ductility.

Morphology and mechanical properties of poly (phenylene sulfide)/isotactic polypropylene in situ microfibrillar blends

2005 ◽  
Vol 45 (9) ◽  
pp. 1303-1311 ◽  
Author(s):  
Hui Quan ◽  
Gan-Ji Zhong ◽  
Zhong-Ming Li ◽  
Ming-Bo Yang ◽  
Bang-Hu Xie ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Isotactic Polypropylene ◽  
Morphology And Mechanical Properties ◽  
Phenylene Sulfide

scholarly journals Preparation and Properties of Viscose Rayon/O-carboxymethyl Chitosan Antibacterial Fibers

2011 ◽  
Vol 6 (3) ◽  
pp. 155892501100600 ◽  
Author(s):  
Youbo Di ◽  
Guoqiang Long ◽  
Huiqin Zhang ◽  
Qingshan Li
Keyword(s):  
Mechanical Properties ◽  
Viscose Rayon ◽  
Moisture Absorption ◽  
Cellulose Xanthate ◽  
Carboxymethyl Chitosan ◽  
Infrared Scanning ◽  
Transmission Electron ◽  
Structure Morphology ◽  
Viscose Process ◽  
Morphology And Mechanical Properties

Antimicrobial viscose rayon/O-carboxymethyl chitosan fibers (VCMFs) were manufactured by spinning the mixture of O-carboxymethyl chitosan (O-CMCS) xanthate and cellulose xanthate via the viscose process. The structure, morphology and mechanical properties were investigated by infrared, scanning electron microscopy, transmission electron microscope and tensile test. The results show that the blend fibers of cellulose and O-CMCS were satisfactorily prepared and the two polymers were mixed homogeneously. VCMFs display striation along the fiber similar to those of viscose rayon fibers, and their mechanical properties are close to that of viscose rayon. With O-CMCS blended, VCMFs showed good moisture absorption and antibacterial activity against E.coli.

Polyolefin blends: 2. Effect of EPR composition on structure, morphology and mechanical properties of iPP/EPR alloys

Polymer ◽  
1987 ◽  
Vol 28 (11) ◽  
pp. 1929-1936 ◽  
Author(s):  
R. Greco ◽  
C. Mancarella ◽  
E. Martuscelli ◽  
G. Ragosta ◽  
Jinghua Yin
Keyword(s):  
Mechanical Properties ◽  
Polyolefin Blends ◽  
Structure Morphology ◽  
Morphology And Mechanical Properties
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