Results 281 to 290 of about 1,549,325 (349)

Time‐Dependent Properties of Isotactic Polypropylene Fibers

Annals of the New York Academy of Sciences, 1999
Many physical properties of polymers exhibit appreciable changes with the time. Some of these changes are due to the phenomenon reported as “physical aging.” Physical aging of polymers, depending only on time, occurs in amorphous polymers stored at a temperature below the glass transition temperature (Tg): when the system is rapidly cooled through Tg ...
G. BARRA, D'ANIELLO, Concetta, R. RUSSO, VITTORIA, Vittoria   +3 more
openaire   +3 more sources

Textile polypropylene fibers: fundamentals

1999
Polypropylene (PP) fibers contain, according to ISO 2076, minimally an 85% portion of macromolecular polypropylene chains and maximally 15% of another fiber-forming polymer, the content of nonfiber-forming substance being unlimited. Of the stereoregular isomers, only isotactic PP is used for fiber preparation.
Anton Marcinčin, Martin Jambrich
openaire   +1 more source

Performance of polypropylene fiber reinforced GGBFS-based alkali activated composites under sulfate and freeze–thaw conditions

Materials Structure, 2023
Khatib Zada Farhan, Azmi Megat Johari Megat, Ramazan Demirboğa   +2 more
semanticscholar   +1 more source

Fiber reinforced rubber modified polypropylene

Polymer Engineering & Science, 1975
AbstractReinforcement can improve the modulus, heat distortion temperature and thermal expansion coefficient of rubber modified polypropylene. These improvements canbe obtained with a minimum sacrifice in resin ductility and impact toughness. Our studies have shown that reinforcement with small discontinuous fibers can provide a material with a good ...
William M. Speri, George R. Patrick
openaire   +1 more source

Experimental Study on Mechanical Performance and Microstructure of Polypropylene Fiber Recycled Concrete

KSCE Journal of Civil Engineering, 2023
F. Wei, Liping Li, Yu Zhu, Youzheng Zhao
semanticscholar   +1 more source

Melt Spinning of Polypropylene Fiber

Advance Research in Textile Engineering, 2023
In this paper the melt spinning process and technology of polypropylene fiber, polymerization conditions, preparation of polypropylene fiber by a larger variety of processes and the stress in the spinline was presented. More emphasis was given on the various polymerization processes (gas-phase and liquid-phase polymerization), catalyst system ...
openaire   +1 more source

Natural fiber/polypropylene composites

1999
There are ecological and economical reasons in favor of the use of natural fibers as reinforcing fibers for plastics. A lower price, better recyclability, hygienic harmlessness and a carbon dioxide neutral combustion are the advantages of natural fibers compared to glass fibers (GF).
openaire   +1 more source

Newspaper Fiber-Reinforced Polypropylene Composite

Journal of Reinforced Plastics and Composites, 1993
As an effort to reuse old newspaper, a newspaper fiber-reinforced polypro pylene (NPF/PP) composite was made. The effects of the manufacturing conditions, addi tives, and interfacial modification on the mechanical properties of the composites were in vestigated.
Shan Ren, David N.-S. Hon
openaire   +1 more source

Dyeable polypropylene fibers via nanotechnology

Journal of Applied Polymer Science, 2007
AbstractPolypropylene (PP) nanocomposites with three different clay loadings were prepared by solution mixing technique. The solution‐mixed nanocomposites were extruded to fibers using a single screw extruder. The PP nanocomposite fibers obtained were uniformly dyed with three distinct disperse dyes at different levels of shade. The enhanced dyeability
Lalit Toshniwal, Qinguo Fan, Samuel C. Ugbolue   +2 more
openaire   +1 more source

Effect of the addition of polypropylene fiber on concrete properties

, 2021
Mujeebul Rahman Latifi, Ö. Biricik, Ali Mardani Aghabaglou   +2 more
semanticscholar   +1 more source