Study on thermal stability of poled non-linear optical polymers

查看全文 作　　者：M[1]hlmann;[1]G.R.;[1]vanderVorst;[1]C.P.J.M. 机构地区：[1]AKZO NOBEL Research Laboratories Arnhem,P.O.Box 9300,6800 SB Arnhem,The Netherlands,AKZO NOBEL Research Laboratories Arnhem,P.O.Box 9300,6800 SB Arnhem,The Netherlands,AKZO NOBEL Research Laboratories Arnhem,P.O.Box 9300,6800 SB Arnhem,The Netherlands,AKZO NOBEL Research Laboratories Arnhem,P.O.Box 9300,6800 SB Arnhem,The Netherlands 出　　处：《Chinese Journal of Chemistry》索引1996年第14卷第5期,共9页 摘　　要：A logarithmic expression is proposed to describe relaxation of the polar order in side chain polymers,together with a new way of plotting temperature dependent relaxation data.This results in a straight line extending even below the glass transition temperature in the case of poled nonlinear optics (NLO) side chain polymers.A simple procedure to determine the rotational diffusion constant Dr is given and Dr values of several polymer systems have been evaluated and compared with each other.It appears that,starting from the conventional and well known poled polymer system currently applied,a further lowering of Dr by about 3 orders of magnitude is necessary in order to reach an acceptable orientational stability or lifetime of poled polymers for practical applications.Attempts have been made to introduce electron push-pull substituents into high thermostable molecular frameworks and results of preliminary measurements are reported. 关 键 词：THERMAL stability poled POLYMER FILM ORGANIC nonlinear optical materials