The effect of gelation sequence on the mechanical properties of plasticized polyurethane-poly(glycidyl methacrylate) simultaneous interpenetrating network

1999 ◽  
Vol 42 (1) ◽  
pp. 93-99 ◽  
Author(s):  
Yiqun Liu ◽  
Zhengmao Zhu ◽  
Tongzhai Gao ◽  
Huimin Tan
Keyword(s):  
Mechanical Properties ◽  
Glycidyl Methacrylate ◽  
Interpenetrating Network

The effect of simultaneous fiber surface treatment and matrix modification on mechanical properties of unidirectional ultra-high molecular weight polyethylene fiber/epoxy/nanoclay nanocomposites

2018 ◽  
Vol 52 (21) ◽  
pp. 2961-2972 ◽  
Author(s):  
Mohammad Mohammadalipour ◽  
Mahmood Masoomi ◽  
Mojtaba Ahmadi ◽  
Zahra Kazemi
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Tensile Strength ◽  
High Molecular Weight ◽  
Glycidyl Methacrylate ◽  
Interfacial Adhesion ◽  
Fiber Surface ◽  
Cohesive Failure ◽  
Polyethylene Fiber ◽  
Ultra High Molecular Weight

Nonpolar structure of ultra-high molecular weight polyethylene fiber leads to a weak interfacial adhesion in ultra-high molecular weight polyethylene fiber reinforced epoxy composite. Herein, synchronized fiber and matrix modifications were utilized so as to improve the interfacial adhesion, resulting in promoting mechanical properties of these composites. For this purpose, the surface of ultra-high molecular weight polyethylene fiber was chemically treated with glycidyl methacrylate and the epoxy resin was modified through incorporation of different contents of nanoclay. The mechanical properties results showed that individual modification, either fiber or matrix, can just lead to improvements around 36.74% and 10.54% in tensile strength as well as 14.28% and 4.27% in tensile modulus, respectively. However, the ultimate outcome of the study revealed that much higher improvement can be achieved in synergistic attitude. The highest enhancement around 48.31% and 26.76% in tensile strength and modulus were seen for the sample containing glycidyl methacrylate-treated ultra-high molecular weight polyethylene fibers as reinforcement and nano epoxy modified with 1 wt.% of nanoclay. Such observation could be attributed to the mechanical interlocking and chemical reaction which were arising from incorporation of nanoclay in matrix and chemical treatment of fiber surface, correspondingly. In this regard, fiber roughness and chemical bonds formed between treated fiber and modified matrix play a key role in improving interfacial adhesion. Moreover, the fractured surface of such composites studied by scanning electron microscope confirmed the mechanical results and showed that much more matrix was adhered to the fiber surface after treatment, indicating cohesive failure.

Development of visible-light responsive and mechanically enhanced “smart” UCST interpenetrating network hydrogels

Soft Matter ◽  
2018 ◽  
Vol 14 (1) ◽  
pp. 151-160 ◽  
Author(s):  
Yifei Xu ◽  
Onkar Ghag ◽  
Morgan Reimann ◽  
Philip Sitterle ◽  
Prithwish Chatterjee ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Visible Light ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Solution Temperature ◽  
Interpenetrating Network ◽  
Critical Solution Temperature ◽  
Smart Hydrogel ◽  
Upper Critical Solution Temperature

An interpenetrating polymer network, chlorophyllin-incorporated “smart” hydrogel was synthesized and exhibited enhanced mechanical properties, upper critical solution temperature swelling, and promising visible-light responsiveness.

Mechanical Properties of Poly(Butylene Succinate) Reinforced with Alpha Cellulose

2015 ◽  
Vol 1119 ◽  
pp. 283-287
Author(s):  
Sarit Liprapan ◽  
Thumnoon Nhujak ◽  
Pranut Potiyaraj
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flexural Strength ◽  
Young’S Modulus ◽  
Glycidyl Methacrylate ◽  
Interfacial Interaction ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Butylene Succinate ◽  
Twin Screw

The objective of this study is to prepare α-cellulose reinforced poly (butylene succinate) composites (PBS/α-cellulose). The effect of amount α-cellulose on the mechanical properties of the composites was investigated. To improve interfacial interaction between PBS and α-cellulose, glycidyl methacrylate grafted poly (butylene succinate) (PBS-g-GMA) was used as a compatibilizer. Mechanical properties of PBS composites prepared by using a twin-screw extruder were investigated. The mechanical properties of PBS/α-cellulose decreased due to the agglomeration of α-cellulose. Nevertheless, tensile strength, Young’s modulus and flexural strength of PBS composites were improved after the incorporation of PBS-g-GMA. The optimum loading of PBS-g-GMA and α-cellulose in the PBS was found to be 5 and 6 phr.

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