Health & Environmental Research Online (HERO)


Print Feedback Export to File
8712688 
Journal Article 
Synthesis of polymer materials by low-energy electron beam. XI. Synthesis of liquid-crystalline side-chain polymer by electron beam irradiation 
Ando, M; Uryu, T 
1989 
27 
9 
325-329 
English 
Using the monomer in which the methacryloyl group was combined with a hexamethylene spacer accompanied by a mesogenic biphenyl group, EB (Electron Beam) reactivity of the monomers and properties of the liquid-crystalline side-chain polymer are reported. Two kinds of monomers, 4-(methacryloyloxy)hexyloxy-4′-methoxybiphenyl (MAHMB) and 4-(methacryloyloxy)hexyloxy-4′-ethoxybiphenyl (MAHEB) were synthesized. X-ray diffraction measurements were conducted on the irradiated samples having different preparation conditions. The reflections of poly-MAHMB and poly-MAHEB which were purified by the reprecipitation after EB irradiation, showed only broad amorphous halos, and the orientation of side-chains did not occur without thermal treatment. However, the reflections of as-irradiated polymers were similar to those of the melted samples. This indicate that the EB polymerization proceeds with intermolecular organization of mesogenic groups.