Effect of maleic anhydride-grafted polypropylene on the flow orientation of short glass fiber in molten polypropylene and on tensile properties of composites

2017 ◽  
Vol 37 (6) ◽  
pp. 1755-1763 ◽  
Author(s):  
Hideyuki Uematsu ◽  
Yu Suzuki ◽  
Yoshiyuki Iemoto ◽  
Shuichi Tanoue
Keyword(s):  
Maleic Anhydride ◽  
Glass Fiber ◽  
Tensile Properties ◽  
Short Glass Fiber ◽  
Short Glass ◽  
Properties Of Composites

Study on the Morphologies and Mechanical Properties of PP/EOC/SGF Composites with and without Compatilizers

2013 ◽  
Vol 331 ◽  
pp. 387-390
Author(s):  
Ji Nian Yang ◽  
Ai Qin Xu
Keyword(s):  
Mechanical Properties ◽  
Impact Toughness ◽  
Maleic Anhydride ◽  
Glass Fiber ◽  
Interfacial Adhesion ◽  
Phase Structures ◽  
Short Glass Fiber ◽  
Pp Composites ◽  
Short Glass ◽  
Embedded Configuration

The polypropylene/ethylene-1-octene/short glass fiber (PP/EOC/SGF) ternary composites were prepared by extrusion and subsequent injection processes. The effects of compatilizers, including maleic anhydride grafted PP (PP-g-MAH) and maleic anhydride grafted EOC (EOC-g-MAH), on the evolution of phase structures and mechanical properties of PP composites were examined. Results show that the interfacial adhesion between SGF and matrix are enhanced significantly. Moreover, the EOC-g-MAH promotes to form the elastomeric particle-embedded configuration. Mechanical testing reveals that the PP/EOC/SGF composites characterized by much higher impact toughness and keeping the competitively tensile properties could be obtained through co-incorporation of SGF and EOC as well as right compatilizers adopted.

scholarly journals Constant Temperature Approach for the Assessment of Injection Molding Parameter Influence on the Fatigue Behavior of Short Glass Fiber Reinforced Polyamide 6

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1569
Author(s):  
Selim Mrzljak ◽  
Alexander Delp ◽  
André Schlink ◽  
Jan-Christoph Zarges ◽  
Daniel Hülsbusch ◽  
...  
Keyword(s):  
Injection Molding ◽  
Glass Fiber ◽  
Process Parameters ◽  
Fatigue Properties ◽  
Injection Molding Process ◽  
Molding Process ◽  
Short Glass Fiber ◽  
Glass Fiber Reinforced ◽  
Molding Parameter ◽  
Short Glass

Short glass fiber reinforced plastics (SGFRP) offer superior mechanical properties compared to polymers, while still also enabling almost unlimited geometric variations of components at large-scale production. PA6-GF30 represents one of the most used SGFRP for series components, but the impact of injection molding process parameters on the fatigue properties is still insufficiently investigated. In this study, various injection molding parameter configurations were investigated on PA6-GF30. To take the significant frequency dependency into account, tension–tension fatigue tests were performed using multiple amplitude tests, considering surface temperature-adjusted frequency to limit self-heating. The frequency adjustment leads to shorter testing durations as well as up to 20% higher lifetime under fatigue loading. A higher melt temperature and volume flow rate during injection molding lead to an increase of 16% regarding fatigue life. In situ Xray microtomography analysis revealed that this result was attributed to a stronger fiber alignment with larger fiber lengths in the flow direction. Using digital volume correlation, differences of up to 100% in local strain values at the same stress level for different injection molding process parameters were identified. The results prove that the injection molding parameters have a high influence on the fatigue properties and thus offer a large optimization potential, e.g., with regard to the component design.

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