The Influence of Technological Conditions on Cell Density and Cell Morphology of PPESK Microporous Material

2013 ◽  
Vol 423-426 ◽  
pp. 507-510
Author(s):  
Min Jie Qu ◽  
Tian Qi Li ◽  
Lai Jiu Zheng ◽  
Shi Yang Zhu ◽  
Ling Ling He ◽  
...  
Keyword(s):  
High Temperature ◽  
Cell Density ◽  
Cell Morphology ◽  
Saturation Pressure ◽  
Microporous Material ◽  
Foaming Agent ◽  
Temperature Resistance ◽  
Engineering Plastic ◽  
High Temperature Resistance ◽  
Foaming Temperature

Phthalazinone structure contained phthalaazione ether sulfone ketone (PPESK) is a kind of excellent engineering plastic with high temperature resistance and resolvability. In this paper, SC-CO2was used as foaming agent to prepare PPESK foams by temperature rising method. The influence of technological conditions like foaming time, foaming temperature and saturation pressure on cell density and cell morphology was discussed and analyzed.

Key Parameters Influencing Microcellular Polystyrene Cell Morphology Blowing with Supercritical CO2

2012 ◽  
Vol 501 ◽  
pp. 237-242 ◽  
Author(s):  
Chang Yun Gao ◽  
Nan Qiao Zhou ◽  
Ti Kun Shan ◽  
Zhen Xiang Xin
Keyword(s):  
Size Distribution ◽  
Cell Size ◽  
Cell Density ◽  
Cell Morphology ◽  
Saturation Pressure ◽  
Processing Temperature ◽  
Polymer Foam ◽  
Cell Size Distribution ◽  
Average Cell ◽  
Foaming Temperature

Polystyrene microcellular foams blowing with supercritical CO2 were prepared with a novel polymer foam processing simulator. Key parameters influencing Polystyrene cell morphology were investigated. The effect of processing temperature and saturation pressure on cell morphology was observed by scanning electron microscope and the average cell diameter and cell size distribution was calculated. The results show that the cell density decrease and cell size increase with the increase of foaming temperature. The cell density increase and cell size decrease with the increase of saturation pressure. And the cell size distribution shows a narrow distribution at lower foaming temperature and higher saturation pressure.

Research and Development of Self-Lubricating Bearing Materials

2013 ◽  
Vol 651 ◽  
pp. 198-203
Author(s):  
Xiu Ling Wang ◽  
Li Ying Yang ◽  
Shou Ren Wang
Keyword(s):  
High Temperature ◽  
Research And Development ◽  
Metal Matrix ◽  
Future Trend ◽  
Al Alloy ◽  
Temperature Resistance ◽  
The Future ◽  
High Temperature Resistance ◽  
Bearing Materials ◽  
New Type

It is significant and necessary to carry out the research and development of self-lubricating bearing. The current study of metal matrix self-lubricating bearing materials is summarized. A new type of high temperature self-lubricating Ti-Al alloy bearing materials is proposed. It is light, anti-friction, anti-corrosion and high temperature resistance (600 °C). The future trend is introduced in the end of this paper.

Mineral-impregnated carbon fibre reinforcement for high temperature resistance of thin-walled concrete structures

2019 ◽  
Vol 97 ◽  
pp. 68-77 ◽  
Author(s):  
Kai Schneider ◽  
Albert Michel ◽  
Marco Liebscher ◽  
Lucas Terreri ◽  
Simone Hempel ◽  
...  
Keyword(s):  
High Temperature ◽  
Carbon Fibre ◽  
Concrete Structures ◽  
Fibre Reinforcement ◽  
Temperature Resistance ◽  
High Temperature Resistance ◽  
Thin Walled

scholarly journals The effect of foaming agent on mechanical and physical properties of Polypropylene

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
SEDEF CAKIR 1 ◽  
MUHAMMED AYCICEK 1 ◽  
EDIZ ALTUN 2 ◽  
Akin Akinci 1
Keyword(s):  
Mechanical Properties ◽  
Cell Density ◽  
Cell Morphology ◽  
Injection Pressure ◽  
Skin Layer ◽  
Polymer Materials ◽  
Cell Diameter ◽  
Melt Temperature ◽  
Foaming Agent ◽  
Foaming Agents

In this study, Polypropylene (PP) foam materials were used with injection parameters such as melting, molding and injection temperatures. To produce foam materials, chemical foaming agents were used, and added to polymer materials as 1wt.%, 1.5wt.%, 2wt.%, 2.5wt.%, 3wt.%. The mechanical properties of foam samples were determined based on the parameters. Cell morphology characterization such as cell diameter, cell count, skin layer thickness and cell density, and mechanical properties such as tensile and impact strength of polymer foams were examined.Generally, the closed-cell foam structure was obtained. The most important parameters affecting the cell morphology have been injection pressure, melt temperature and amount of foaming agent. With increasing the amount of foaming agent, cell density increased, foam density and mechanical properties decreased.

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