Group Contribution to Molar Refraction and Refractive Index of Conjugated Polymers

High refractive index of transparent acrylate polymers functionalized with alkyl sulfur groups

“…16 Polymethacrylates, which are typical thermoplastics, are easy to polymerize and yield transparent films suitable for optical materials. However, a material having a high refractive index usually has a small Abbe's number, 21 whereas sulfur-containing methacrylates have high refractive indices and large Abbe's numbers. 22,23 Several nonorganic groups, including sulfur, germanium, phosphorus, titanium and halogens have been known to induce higher refractive indices.…”

Synthesis and Solution Self‐Assembly of Polyisoprene‐block‐poly(ferrocenylmethylsilane): A Diblock Copolymer with an Atactic but Semicrystalline Core‐Forming Metalloblock

“…102 However, the device applications of these highly conjugated, organic polymers are often limited by unfavourable optical properties and insolubility. 103 An alternative approach incorporates high refractive index inorganic clusters into a polymer matrix. 104 For example, RIs reported for nanocomposites containing PEO (PEO: poly(ethylene oxide)) and PbS range between 2.9 and 3.4.…”

Estudo das propriedades eletrônicas e ópticas de filmes e dispositivos poliméricos.

“…Yang C.J. et al [85] obtiveram n = 2,0 para filmes de PPV alcóxi-substituídos, enquanto nossos resultados mostram um valor similar em torno de 1,9 para a amostra não degradada.…”

“…No intervalo de energia onde k ≈ 0 (ou k muito menor que n), a equação de LorenzLorentz [63,[83][84][85][86][87][88][89][90][91][92][93][94][95][96] (LL) oferece a possibilidade de se calcular o valor de n de um polímero desconhecido se as frações (R j ) e os volumes (V j ) molares dos seus grupos funcionais são conhecidos. Nesse caso, n pode ser obtido a partir da equação: (ii) para um estágio intermediário, i.e.…”

“…A Tabela 6.II mostra os volumes molares desses grupos obtidos da literatura [83][84][85] , onde os valores de V ND e V CD são iguais a:…”