Details

Autor(en) / Beteiligte

• Sun, Zhen
• Qin, Ailin
• Chen, Zihua
• Wang, Yinghan

Titel

Large pretilt angle induced by an anhydride-terminal hyperbranched polyimide liquid crystal alignment layer

Ist Teil von

• Liquid crystals, 2010-03, Vol.37 (3), p.345-348

Ort / Verlag

Taylor & Francis

Erscheinungsjahr

2010

Quelle

Taylor & Francis Journals Auto-Holdings Collection

Beschreibungen/Notizen

• Through the polycondensation of a four-functional amine with pyromellitic dianhydride, a hyperbranched polyimide (HPI) was synthesised in this study. The HPI was used for liquid crystal alignment layers. Wide angle X-ray diffraction measurement showed that the HPI film was amorphous. The morphology of the surface layer of film was determined by atomic force microscopy. It is novel that a larger pretilt angle, above 8°, has been achieved with the rubbed HPI alignment layers. This result was different from that in a previous report, in which only a 2.8° pretilt angle was induced by a HPI alignment film.