Mechanical and Tribological Properties of Polymers and Polymer-Based Composites

Abstract

A definition of rigidity of polymers and polymer-based composites (PBCs) by an equation is formulated. We also discuss tribological properties of polymers and PBCs including frictions (static, sliding and rolling) and wear. We discuss connections between viscoelastic recovery in scratch resistance testing with brittleness B, as well as Charpy and Izod impact strengths relations with B. Flexibility Y is related to a dynamic friction. A thermophysical property, namely linear thermal expansivity, is also related to the brittleness B. A discussion of equipment needed to measure a variety of properties is included.

Telechelic Oligo(N-Vinylpyrolydone)swith Cumene Based Terminal Groups for Block-Copolymer and Nanoparticle Obtaining

“…There are articles on crystallography 20 , on viscoelasticity 21 , on electronic materials systems for power transmission 22 , on Materials Science learning experience at a university venue for middle school students 23 , on converting traditional Materials laboratories to projectbased learning experiences 24 , on "green" approach with an example of using post-consumer waste 25 , on polymers in the production of crude oil [26][27][28][29] . As noted by Gedde and Hedenqvist 30 , the same general laws are applied to both synthetic and natural polymers -while relations between mechanical and tribological properties of polymers exist 31 . Our results reported above seem also to suggest that antibacterial behavior of polymers deserves attention in the instruction as well.…”

Wood Sawdust Plus Silylated Styrene Composites with Low Water Absorption

“…The TGA technique is described in detail in some studies. 31,32 At 373 K we see 5-7 % mass losses -likely due to elimination of moisture and ethyl alcohol. The main degradation processes proceed in the temperature range of 523-623 K. The composite VII is characterized by the high thermal stability if compared with composites III and IV.…”

“…Polymer rigidity is defined as 1/Y. 31 We find that the bending strength values are inversely proportional to the flexibility. If we exceed 5 wt% of the binder, the bending strength decreases; apparently the binder has a relatively high flexibility.…”

Utilization of CFRP waste as a filler in polyester resin-based composites

“…The frictional sliding elements should have a low dynamic coefficient of friction and low wear under dry sliding conditions in combination with smooth metal surfaces (e.g., gears, bearings, etc.). 3 One should focus on the correct selection of the tribological system in the tests 4,5 when selecting the composition of the friction pair, the functions and working conditions of the product should be involved in the project. It is important that the product is reliable and economical viable.…”