Maleic anhydride-grafted-polybutadiene as a controlled defibrillating and dispersing agent for short aramid fiber reinforced thermoplastic polyurethane composite with improved mechanical properties

2013 ◽  
Vol 130 (3) ◽  
pp. 2205-2216 ◽  
Author(s):  
G. S. Shibulal ◽  
Kinsuk Naskar
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Thermoplastic Polyurethane ◽  
Aramid Fiber ◽  
Fiber Reinforced ◽  
Polyurethane Composite ◽  
Dispersing Agent

Interfacial and Mechanical Properties of Continuous Fiber-Reinforced PP via Pre Impregnated Winding

2017 ◽  
Vol 25 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Jiuqiang Song ◽  
Yan Qin ◽  
Jia Chen ◽  
Siwen Qin
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Glass Fiber ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Fiber Reinforced ◽  
Continuous Glass ◽  
Continuous Glass Fiber ◽  
Glass Fiber Reinforced ◽  
Silane Coupling

In this paper, a continuous glass fiber-reinforced polypropylene prepreg was prepared by fiber treatment with a silane coupling agent and MAH-g-PP resin. Continuous glass fiber-reinforced polypropylene sheets were made from prepreg and PP mats by hot-pressing; they displayed exceptional performance. This paper studies the effects of maleic anhydride grafting on the polypropylene crystallinity and MAH-g-PP content in the prepreg, and the mechanical properties of the composites. The results showed that modifying PP with maleic anhydride decreased the tacticity of the polypropylene molecular chain, which reduced the crystallinity and melting point. An excellent interface formed between the polypropylene and fiber after the glass fiber was treated with a silane coupling agent and MAH-g-PP resin. The mechanical properties of the polymer materials displayed more favorable properties as MAH-g-PP content increased; the ideal MAH-g-PP content was 50%.

scholarly journals Effect of Low-Temperature Pyrolysis on the Properties of Jute Fiber-Reinforced Acetylated Softwood Kraft Lignin-Based Thermoplastic Polyurethane

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1338
Author(s):  
Hyun-gyoo Roh ◽  
Sunghoon Kim ◽  
Jungmin Lee ◽  
Jongshin Park
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Water Absorption ◽  
Thermoplastic Polyurethane ◽  
Kraft Lignin ◽  
Interfacial Bonding ◽  
Jute Fiber ◽  
Fiber Reinforced ◽  
Low Temperature Pyrolysis ◽  
Softwood Kraft Lignin

Short jute fiber-reinforced acetylated lignin-based thermoplastic polyurethane (JF reinforced ASKLTPU) was prepared and characterized as a short-fiber-reinforced elastomer with carbon-neutrality and biodegradability. The acetylated softwood kraft lignin-based thermoplastic polyurethane (ASKLTPU) was prepared with polyethylene glycol (PEG) as a soft segment. Short jute fiber was modified using low-temperature pyrolysis up to the temperatures of 200, 250, and 300 °C in order to remove non-cellulosic compounds of jute fibers for enhancing interfacial bonding and reducing hydrophilicity with the ASKLTPU matrix. JF-reinforced ASKLTPUs with fiber content from 5 to 30 wt % were prepared using a melt mixing method followed by hot-press molding at 160 °C. The JF-reinforced ASKLTPUs were characterized for their mechanical properties, dynamic mechanical properties, thermal transition behavior, thermal stability, water absorption, and fungal degradability. The increased interfacial bonding between JF and ASKLTPU using low-temperature pyrolysis was observed using scanning electron microscopy (SEM) and also proved via interfacial shear strength measured using a single-fiber pull-out test. The mechanical properties, thermal properties, and water absorption aspects of JF-reinforced ASKLTPU were affected by increased interfacial bonding and reduced hydrophilicity from low-temperature pyrolysis. In the case of the degradation test, the PEG component of ASKLPTU matrix highly affects degradation and deterioration.

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