Effect of Substituted Phenylnadimides on Processing and Properties of PMR (Polymerization of Monomeric Reactants) Polyimide Composites.

1985 ◽  
Author(s):  
W. B. Alston ◽  
R. W. Lauver
Keyword(s):  
Polyimide Composites

scholarly journals Tunable Crystalline Phases in UV-Curable PEG-Grafted Ladder-Structured Silsesquioxane/Polyimide Composites

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2295 ◽  
Author(s):  
Ryung Il Kim ◽  
Ju Ho Shin ◽  
Jong Suk Lee ◽  
Jung-Hyun Lee ◽  
Albert S. Lee ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Surface Properties ◽  
Weight Ratio ◽  
Hybrid Polymer ◽  
Water Contact ◽  
Uv Curable ◽  
Wide Range ◽  
Drastic Increase ◽  
Polyimide Composites ◽  
Crystalline Polyethylene

A series of UV-curable hybrid composite blends containing a carboxylic acid functionalized polyimidewith varying amounts of high molecular weight (~1 K) PEG-grafted ladder-structured polysilsesquioxanes copolymerized with methacryl groups were fabricated and their structural, thermal, mechanical, and surface properties characterized. At a composite weight ratio of polyimide above 50 wt.%, a stark shift from amorphous to crystalline polyethylene glycol (PEG) phases were observed, accompanied by a drastic increase in both surface moduli and brittleness index. Moreover, fabricated composites were shown to have a wide range water contact angle, 9.8°–73.8°, attesting to the tunable surface properties of these amphiphilic hybrid polymer composites. The enhanced mechanical properties, combined with the utility of tunable surface hydrophilicity allows for the possible use of these hybrid polymer composites to be utilized as photosensitive polyimide negative photoresists for a myriad of semiconductor patterning processes.

Friction and Wear Behaviors of Solid Lubricants/Polyimide Composites in Liquid Mediums

2010 ◽  
Vol 654-656 ◽  
pp. 2763-2766 ◽  
Author(s):  
Li Wen Mu ◽  
Xin Feng ◽  
Yi Jun Shi ◽  
Huai Yuan Wang ◽  
Xiao Hua Lu
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Tribological Properties ◽  
Alkaline Solution ◽  
Dry Friction ◽  
Friction And Wear ◽  
Solid Lubricants ◽  
Polyimide Composites ◽  
Inorganic Fillers ◽  
Ptfe Composites

The tribological properties of polyimide (PI) composites reinforced with graphite or MoS2 sliding in liquid alkali and water as well as dry friction were investigated using a ring-on-ring tester. The results show that the friction coefficient (μ) and wear rate (W) for both graphite/PI and MoS2/PI composites in different liquid mediums are μdry>μwater >μalkali and Wwater>Wdry >Walkali. Results also indicate that the friction coefficient and wear rate of the PI composites filled with different solid lubricants are μMoS2 >μgraphite and W MoS2 >Wgraphite in different liquid mediums. In addition, the hydrophobic inorganic fillers are fit for the reinforcement of polymer-based composites sliding in liquid mediums. It is also concluded from the authors’ work that the wear rate and friction coefficient of polymer-based (such as PI, PTFE) composites in the alkali lubricated conditions is lowest among all the friction conditions. This may be attributed to the ionic hydration in the alkaline solution.

Tribological behavior of short-fiber-reinforced polyimide composites under dry-sliding and water-lubricated conditions

2007 ◽  
Vol 107 (2) ◽  
pp. 788-796 ◽  
Author(s):  
Jiansheng Chen ◽  
Junhong Jia ◽  
Huidi Zhou ◽  
Jianmin Chen ◽  
Shiyong Yang ◽  
...  
Keyword(s):  
Tribological Behavior ◽  
Short Fiber ◽  
Dry Sliding ◽  
Fiber Reinforced ◽  
Polyimide Composites

β-Cyclodextrin toughened polyimide composites toward all-organic dielectric materials

2017 ◽  
Vol 29 (2) ◽  
pp. 1182-1188 ◽  
Author(s):  
Chunwu Zhang ◽  
Ying Yu ◽  
Yichun Ding ◽  
Ting Yang ◽  
Gaigai Duan ◽  
...  
Keyword(s):  
Dielectric Materials ◽  
Polyimide Composites ◽  
Organic Dielectric

In situ iodoalkane-reduction of graphene oxide in a polymer matrix: an easy and effective approach for the fabrication of conductive composites

2015 ◽  
Vol 3 (43) ◽  
pp. 11531-11539 ◽  
Author(s):  
Haiquan Guo ◽  
Fangfang Liu ◽  
Jianying Zhao ◽  
Haibo Yao ◽  
Rizhe Jin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Polymer Matrix ◽  
Conductive Composites ◽  
Polyimide Composites

Graphene/polyimide composites with the conductivity of 2.22 S m−1 were fabricated via in situ reduction of graphene oxide by 1,2-diiodoethane.

Solvothermally reduced graphene oxide/polyimide composites: Structures and thermal and mechanical properties

2018 ◽  
Vol 136 (10) ◽  
pp. 47164 ◽  
Author(s):  
Xin Zhang ◽  
Yahui Ma ◽  
Yingjin Pei ◽  
Shuojin Zheng ◽  
Qinghong Fang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Thermal And Mechanical Properties ◽  
Reduced Graphene ◽  
Polyimide Composites
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