SRT material, composite and method for producing the same
AssigneeKyoto University
InventorsYoshinobu Tsujii, Keita Sakakibara, Yoshihiko Shimizu, Hiroshi Watanabe, Takaya Sato, Ken Nakano, Hitoshi Hattori
Life of this patent
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Abstract
Using an organic compound having a bottle brush structure, a material having softness and resilience and having excellent low-friction performance (SRT material) can be provided. Preferably, the SRT material contains a reinforcing filler, and may contain a lubricating liquid to be gelled.
Claims20
An organic compound having a branched polymer structure in which plural side chains are branched from a linear or crosslinked main chain and the side chains have an effective surface occupancy σ* of 1% or more represented by the following equation (1):
- σ
- *
- =
- 1
- (
- L
- ×
- M
- n
- ,
- side
-
-
- chain
- M
- n
- ,
- monomer
- +
- r
- main
-
-
- chain
- )
- ×
- (
- W
- side
-
-
- chain
- /
- W
- main
-
-
- chain
- )
- (
- M
- n
- ,
- side
-
-
- chain
- /
- M
- n
- ,
- main
-
-
- chain
- )
- ×
- A
- side
-
-
- chain
- 2
-
- π
-
-
- L
- (
- 1
- )
- (1), wherein:
- rmain chain represents radius of the main chain;
- Aside chain represents cross-sectional area of the side chain;
- Mn, monomer, Mn, side chain, and Mn, main chain each represents molecular weight of the side chains monomer, number-average molecular weight of the side chains, and molecular weight of recurring unit in the main chain, respectively;
- Wside chain and Wmain chain each represents weight of the side chains and weight of the main chain, respectively;
- and
- L represents unit length of polymer chain in the branched polymer structure, and
- wherein at least one of the following (i) and (ii) is satisfied:
- (i) the side chains have a number-average polymerization degree of 5 to 20, and
- (ii) the side chains are branched from the main chain in a density of 1 chain or more per 1 nm length of the main chain.
Dependencies are inferred from the claim text.