scholarly journals Development of Recyclable and High-Performance In Situ Hybrid TLCP/Glass Fiber Composites

2020 ◽  
Vol 4 (3) ◽  
pp. 125
Author(s):  
Tianran Chen ◽  
Dana Kazerooni ◽  
Lin Ju ◽  
David A. Okonski ◽  
Donald G. Baird

By combining the concepts of in situ thermotropic liquid crystalline polymer (TLCP) composites and conventional fiber composites, a recyclable and high-performance in situ hybrid polypropylene-based composite was successfully developed. The recycled hybrid composite was prepared by injection molding and grinding processes. Rheological and thermal analyses were utilized to optimize the processing temperature of the injection molding process to reduce the melt viscosity and minimize the degradation of polypropylene. The ideal temperature for blending the hybrid composite was found to be 305 °C. The influence of mechanical recycling on the different combinations of TLCP and glass fiber composites was analyzed. When the weight fraction ratio of TLCP to glass fiber was 2 to 1, the hybrid composite exhibited better processability, improved tensile performance, lower mechanical anisotropy, and greater recyclability compared to the polypropylene reinforced by either glass fiber or TLCP alone.

Polymer ◽  
2006 ◽  
Vol 47 (25) ◽  
pp. 8374-8379 ◽  
Author(s):  
Ke Wang ◽  
Min Guo ◽  
Daiguo Zhao ◽  
Qin Zhang ◽  
Rongni Du ◽  
...  

Carbon ◽  
2011 ◽  
Vol 49 (10) ◽  
pp. 3382-3385 ◽  
Author(s):  
Limin Gao ◽  
Tsu-Wei Chou ◽  
Erik T. Thostenson ◽  
Zuoguang Zhang ◽  
Magali Coulaud

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1569
Author(s):  
Selim Mrzljak ◽  
Alexander Delp ◽  
André Schlink ◽  
Jan-Christoph Zarges ◽  
Daniel Hülsbusch ◽  
...  

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.


2021 ◽  
pp. 1-13
Author(s):  
Hamed Tanabi ◽  
A. Gencer Atasoy ◽  
Murat Demiral ◽  
Baris Sabuncuoglu

2005 ◽  
Vol 407 (1-2) ◽  
pp. 1-6 ◽  
Author(s):  
J.M. Ferreira ◽  
J.T.B. Pires ◽  
J.D. Costa ◽  
Z.Y. Zhang ◽  
O.A. Errajhi ◽  
...  

2021 ◽  
Vol 58 (4) ◽  
pp. 262-270
Author(s):  
Dong-Ju Yeom ◽  
Seoung-Gil Bang ◽  
Yeon-Jae Jeong ◽  
Hee-Tae Kim ◽  
Seong-Bo Park ◽  
...  

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