scholarly journals Synergistic toughening of polypropylene with ultra-high molecular weight polyethylene and elastomer-olefin block copolymers

RSC Advances ◽  
2019 ◽  
Vol 9 (41) ◽  
pp. 23994-24002 ◽  
Author(s):  
Lucheng Qi ◽  
Lei Wu ◽  
Ren He ◽  
Hui Cheng ◽  
Boping Liu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
Rheological Properties ◽  
High Molecular Weight ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Ultra High Molecular Weight

Blends of polypropylene (PP) and ultra-high molecular weight polyethylene (UHMWPE) with elastomer-olefin block copolymers (OBC) were prepared using an ultrasonic twin-screw extruder, and their mechanical and rheological properties were investigated.

Rheological Properties of RLDPE/LLDPE Blends

2012 ◽  
Vol 268-270 ◽  
pp. 115-118
Author(s):  
Xue Yan Zhao ◽  
Xue Gang Luo ◽  
Xiao Yan Lin ◽  
Xiao Qi ◽  
Hong Ping Zhang ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Twin Screw Extruder ◽  
Normal Flow ◽  
Screw Extruder ◽  
Rheological Analysis ◽  
Twin Screw ◽  
Potential Applications ◽  
Small Content

Blends of recycled LDPE and LLDPE were prepared by the twin-screw extruder at different ratios. Recycled LDPE was used as matrix in this work, LLDPE was used to improve the properties of RLDPE. Virgin LDPE was used in this study as a contrast. Rheological properties of the blends were carefully evaluated by a Haake rheometer and compared with pure LDPE. Rheological analysis shows that virgin LLDPE will promote the normal flow of RLDPE in the a large content and hinder the mobility of chain segments when in a small content of LLDPE. Consequently, the blends show potential applications in high-value products.

Ultra-high molecular weight polyethylene fiber-reinforced thermoplastic corn starch composite

2016 ◽  
Vol 30 (4) ◽  
pp. 564-577 ◽  
Author(s):  
Bin Guo ◽  
Li-Jian Wang ◽  
Peng Yin ◽  
Ben-Gang Li ◽  
Pan-Xin Li
Keyword(s):  
Molecular Weight ◽  
Contact Angle ◽  
High Molecular Weight ◽  
Corn Starch ◽  
Thermoplastic Starch ◽  
Polyethylene Fiber ◽  
Twin Screw ◽  
Uhmwpe Fibers ◽  
Fibrous Morphology ◽  
Ultra High Molecular Weight

The ultra-high molecular weight polyethylene (UHMWPE) fibers, as the fibrous morphology of polyethylene (PE), were first used to reinforce thermoplastic starch (TPS) by a twin screw extruder. The influence of the UHMWPE content on the mechanical and dynamic mechanical thermal properties, thermal stability, contact angle, torque rheological properties, and fractured surface morphology of the UHMWPE/TPS composites was studied in detail. We found that the UHMWPE fibers were well dispersed in the TPS matrix, and the mechanical properties and water resistance of the composites improved significantly. Especially, the incorporation of UHMWPE fibers at a content of 2 wt% generated a composite with better performance (tensile strength of 8.78 MPa and contact angle of 80.2°).

scholarly journals Development of surface properties of ultra-high-molecular-weight polyethylene film using side-chain crystalline block copolymers

2020 ◽  
Vol 40 (3) ◽  
pp. 231-236 ◽  
Author(s):  
Sho Hirai ◽  
Shoichi Ishimoto ◽  
Patchiya Phanthong ◽  
Shigeru Yao
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
High Molecular Weight ◽  
Surface Properties ◽  
Functional Unit ◽  
Side Chain ◽  
Adhesive Properties ◽  
High Adhesion ◽  
Adhesion Contact ◽  
Ultra High Molecular Weight

AbstractUltra-high-molecular-weight polyethylene (UHMWPE) has been widely used in industry; however, the applications for UHMWPE are limited because of low hydrophilic and adhesive properties. Herein, we developed the surface properties of UHMWPE by using side-chain crystalline block copolymers (SCCBCs), which consist of a side-chain crystalline unit and a functional unit. This process only required immersing the UHMWPE film in the diluted SCCBC solution, which enabled the UHMWPE surface to be coated homogeneously. The results of the contact angle and tensile shear test showed that the surface of UHMWPE modified with SCCBC was improved in hydrophilicity and adhesive properties. In addition, high adhesion strength was measured on UHMWPE surfaces dipped in a SCCBC solution at high temperature with the UHMWPE film becoming elongated at all parts other than the adhesion contact area.

Relationship Between Rheological Properties and Microstructure of Polypropylene/Organic Montmorillonite Nanocomposite Compounded by Twin Screw Extruder

2007 ◽  
Author(s):  
Guo Jiang ◽  
Han-Xiong Huang
Keyword(s):  
Rheological Properties ◽  
Yield Stress ◽  
Feeding Rate ◽  
Complex Viscosity ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Property Development ◽  
Organic Montmorillonite ◽  
Twin Screw ◽  
The Relationship

Polypropylene (PP)/organic montmorillonite (OMMT) nanocomposite was compounded in a twin-screw extruder. The objective is to investigate the relationship between rheological properties and microstructure of the nanocompsite. The samples were taken along the screws. Effect of feeding rate on the dynamical rheological property development and microstructure of samples was investigated. The yield stress of nanocomposite was obtained using steady-state shear sweep. The intercalated structure was probed by wide-angle X-ray diffraction (WAXD) and transmission electron microscopy (TEM). Rheological results showed that the complex viscosity of samples increased along the twin-screw extruder. In addition, with the decrease of feeding rate, the yield stress of nanocomposite increased and MMT was dispersed better in PP matrix. Finally, the relationship between dynamical rheological properties and the dispersed state of MMT was analyzed.

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