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Additional resources for A system of physical chemistry. Kinetics
A smooth surface was assumed. Reproduction by permission from . The buffing length of a single fibre l can be expressed by the rubbing pressure M, and the cylinder diameter r as, l% p 2rM: ð2:7Þ From this equation, the ratio of the area, affected by rubbing, Af is proportional to wfl and increases with increase in rubbing pressure, and wf l / Af % FðMÞM 1=2 : ð2:8Þ Here, F(M) is the rubbing stress related to the rubbing pressure. Increasing the number of rubbings increases Af, the ratio of the area affected by rubbing, but it © 2005 Kohki Takatoh, Masaki Hasegawa, Mitsuhiro Koden, Nobuyuki Itoh, Ray Hasegawa and Masanori Sakamoto 30 Masaki Hasegawa becomes saturated when all of the area has been affected by rubbing.
The gap controls the pressure of the buffing cloth on the substrate, and it affects the anchoring strength, pretilt angle, and surface morphology of the substrate. 2 Problems and current solutions The rubbing process is employed for the manufacturing of LCDs with compensation being made for its problems. Typical problems and the current methods to eliminate or control them are discussed in this section. 1. Static electricity and dust Rubbing a high resistance material, such as polyimide, generates static electricity.
17. This tilt angle causes the pretilt angle of the LC . 5 nm from the results of the thickness dependency measurements of the IR dichroism. This depth is in good agreement with Aerle’s estimate . 5 nm in depth, and it was assumed that the alignment layer was reoriented uniformly by the rubbing in the analysis of the results . The relationship between the pretilt angle of the LC and the tilt angle of the main chains of PMDA-ODA, with different lengths of alkyl chain, was studied, and the generation of the pretilt angle of the LC was discussed [41, 54, 59].
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