Design of Zero-Birefringence Cross-Linked Polymers

We analyzed thermoplastic methacrylate polymers and found that their birefringence during polymerization is due to both orientational and photoelastic birefringence. We designed zero-birefringence cross-linked polymers that do not exhibit birefringence during the polymerization process or elastic de...

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Published inApplied physics express Vol. 3; no. 2; pp. 022602 - 022602-3
Main Authors Yamazaki, Sayuri, Tagaya, Akihiro, Koike, Yasuhiro
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.02.2010
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Summary:We analyzed thermoplastic methacrylate polymers and found that their birefringence during polymerization is due to both orientational and photoelastic birefringence. We designed zero-birefringence cross-linked polymers that do not exhibit birefringence during the polymerization process or elastic deformation, and deduced the contributions of cross-linking agents to photoelastic coefficient by analyzing binary cross-linked polymers. When photoelastic coefficient values of ternary cross-linked polymers were almost zero, their average in-plane birefringence was linearly related with the concentration of cross-linking agents. Finally, we designed and demonstrated two types of zero-birefringence cross-linked polymers.
Bibliography:Mechanism for compensating the birefringence of polymers by random copolymerization method in (a) thermoplastic polymers and (b) cross-linked polymers. The structures of the monomers and the cross-linking agents used in this paper; (a) MMA, (b) BzMA, (c) 3FMA, (d) EDMA, and (e) BAEDA. Relation between photoelastic coefficient and the concentration of cross-linking agents of the binary cross-linked polymers; (a) P(MMA/EDMA) and (b) P(MMA/BAEDA). Relation between the average of in-plane birefringence and the concentration of cross-linking agents of the ternary cross-linked polymers; (a) P(MMA/BzMA/EDMA) and (b) P(MMA/BzMA/BAEDA). The compositions and the in-plane birefringence of the cross-linked polymers; (a) P(MMA/EDMA) satisfying only $C = 0$ calculated from the results in Fig. for comparison, (b) P(MMA/BzMA/EDMA) satisfying $C =\Delta n_{\text{ave}} = 0$, and (c) P(MMA/BzMA/BAEDA) satisfying $C =\Delta n_{\text{ave}} = 0$ both calculated from the results in Fig. .
ISSN:1882-0778
1882-0786
DOI:10.1143/APEX.3.022602