Uniform fiber orientation and transcrystallization formed in isotactic polypropylene/short glass fiber composites via a shear-induced orientation extrusion

2017 ◽  
Vol 39 (9) ◽  
pp. 3168-3177 ◽  
Author(s):  
Guo-Xing Li ◽  
Yin Li ◽  
Yu-Dong Shi ◽  
Kai Zhang ◽  
Jian-Bing Zeng ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Isotactic Polypropylene ◽  
Fiber Orientation ◽  
Fiber Composites ◽  
Glass Fiber Composites ◽  
Short Glass Fiber ◽  
Short Glass

Manufacturing Technique and Interfacial Modification of Polypropylene/Short Glass Fiber Composites

2014 ◽  
Vol 910 ◽  
pp. 250-253
Author(s):  
Jia Horng Lin ◽  
Zheng Lan Lin ◽  
Jin Mao Chen ◽  
Ching Wen Lou
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Fiber Composites ◽  
Sem Images ◽  
Glass Fiber Composites ◽  
Single Screw Extruder ◽  
Short Glass Fiber ◽  
Interfacial Modification ◽  
Izod Impact ◽  
Short Glass

Maleic anhydride grafted polypropylene (PP-g-MA) is used as a coupling agent, and the influence of its used amount on the mechanical properties of the polypropylene/short glass fiber (PP/SGF) composites is examined. 1, 2, and 3 wt% of PP-g-MA is separately added to PP/SGF composites that are made at an 80/20 ratio (wt%), made into pellets on a single screw extruder, and then made into test samples on an injection machine. When PP-g-MA increases from 1 wt% to 3 wt%, the tensile strength of the PP/SGF composites increases from 56.22 MPa to 64.85 MPa; likewise, flexural strength increases from 67.29 MPa to 81.24 MPa, and Izod impact strength increases from 197.70 J/m 269.61 J/m. SEM images show that the surface of SGF are encapsulated with a layer of PP matrix, which indicates that PP-g-MA can effectively improve the interfacial adhesion between PP and SGF and thus increase the mechanical properties of the resulting composites.

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