Relationship between degree of polymerization and optical and thermal properties of Bisphenol-A in polycarbonate polymers

Kato, Norikiyo; Ikeda, Shigetoshi; Hirakawa, Manabu; Nishimori, Kana; Ito, Hiroshi

doi:10.1063/1.5088276

Cited by 4 publications

(5 citation statements)

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“…Previously, we only focused on polycarbonates with aromatic rings as monomer [16,17]; however, this time, we expanded the investigation to polycarbonates having alicyclic compound, DNDM, as monomer. It included the clarification of the influences of the D p and polymer end structures to the n d , v d , and T g for alicyclic polycarbonates.…”

Section: Discussionmentioning

confidence: 99%

“…Previously, we investigated the relationship between n d and D p , and between T g and D p , about the high n d materials such as BPEF [16] and Bisphenol-A [17] based Polycarbonate polymers [18][19][20], which are materials for optical lenses. In the case of BPEF, n d decreased with increasing D p for hydroxyl terminated polymer and, whereas n d increase with increasing D p for phenolic terminated polymer.…”

Section: Introductionmentioning

confidence: 99%

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Correlation of the Abbe Number, the Refractive Index, and Glass Transition Temperature to the Degree of Polymerization of Norbornane in Polycarbonate Polymers

et al. 2020

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The influences of the average degree of polymerization (Dp), which is derived from Mn and terminal end group, on optical and thermal properties of various refractive indexed transparent polymers were investigated. In this study, we selected the alicyclic compound, Dinorbornane dimethanol (DNDM) homo polymer, because it has been used as a representative monomer in low refractive index polymers for its unique properties. DNDM monomer has a stable amorphous phase and reacts like a polymer. Its unique reaction allows continuous investigation from monomer to polymer. For hydroxy end group and phenolic end group polymers, the refractive index (nd) decreased with increasing Dp, and both converged to same value in the high Dpregion. However, the Abbe number (νd) of a hydroxy end group polymer is not dependent on Dp, and the νd of a phenolic end group polymer is greatly dependent on Dp. As for glass transition temperatures (Tg), both end group series were increased as Dpincreased, and both converged to the same value.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Correlation of the Abbe Number, the Refractive Index, and Glass Transition Temperature to the Degree of Polymerization of Norbornane in Polycarbonate Polymers

et al. 2020

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“…The monomers used in the polymers have similar basic structures, and these structures cannot be well distinguished due to their close chemical shifts in the 1 H NMR spectra. 13 C NMR spectrum is shown in Figure 4. It is the peak of solvent deuterated chloroform at 77 ppm.…”

Section: The Chemical Structurementioning

confidence: 99%

“…[5][6][7] Among optical resins, polycarbonate is becoming more and more popular in optical applications due to its high transparency, high refractive index, high heat resistance and good plasticity. [8,9] Among aromatic polycarbonate, the molecular structure of bisphenol A polycarbonate (BPA-PC) has a higher polarizability in the main chain direction than that in the side chain direction, and its injection molding products or films after tensile are easy to produce strong positive birefringence effect, [10] which makes the birefringence of BPA-PC more serious, and its refractive index is only 1.59, [11][12][13] These limitations greatly limit the application of BPA-PC in high precision optical devices. [14] In recent years, optical polymers containing diaryl fluorene structures have been developed, [11,[15][16][17] especially the 9,9double (3-methyl-4-hydroxyphenyl) (BMPF) and 9, 9-bis [4 -(2hydroxy-ethoxy) phenyl] fluorene (BPEF) polycarbonate resins.…”

Section: Introductionmentioning

confidence: 99%

Study on the Preparation and Optical Properties of Co‐polycarbonates Based on Binaphthalene and Cardo Structures

Long

Sun

et al. 2023

ChemistrySelect

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Copolymer carbonate was synthesized from diphenyl carbonate (DPC), 9, 9-bis [3-phenyl-4 -(2-hydroxyethoxy) phenyl] fluorene (BPPEF) and 2,2' -bis (2-hydroxy-ethoxy)-1,1' -binaphthalene (BHEBN) by melt transesterification. The composition and random structure of the copolymer were determined by FT-IR, 1 H NMR and 13 C NMR analysis. DSC and TGA analysis showed that Cardo structure could significantly increase the glass transition temperature and thermal decomposition temperature. With the addition of BHEBN, the refractive index of copolymer was increased, but the thermal properties of copolymer were decreased. It is found that the contribution of naphthalene structure to the refractive index of the polymer material is higher than that of benzene structure. When the dosage of BHEBN is 42 mol %, the glass transition temperature (Tg) of the copolymer is 141.8 °C, the maximum thermal decomposition temperature is 421.9 °C, the refractive index is 1.6535, the Abbe number is 21, the transmittance is 88.29 %, and the birefringence is negative 0.01 × 10 À 3 .

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“…Aromatic polycarbonate can be widely used as high refraction optical materials [21], because aromatic ring has a large increase in refractive index. Bisphenol A polycarbonate has a refractive index of 1.59 [21][22][23], but it is easy to produce stress birefringence during processing [24]. The birefringence effect affects the optical imaging effect and is not conducive to the application in the eld of high precision components [25].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Optical Properties of Co-Polycarbonate Containing Cardo Structure and Binaphthalene Structure

Li,

Wang,

Wang

2024

Preprint

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In this paper, molten transesterification was used with diphenyl carbonate (DPC), 9,9'-bis[6-(2-hydroxyethoxy)naphthyl]fluorene (BNEF), 2,2'-bis(2-hydroxyethoxy)-1,1'-binaphthalene (BHEBN) were used as the polymeric monomers to prepare a series of co-polycarbonates with different molar feeding ratios. It is found that when the molar ratio of BHEBN and BNEF is 6:4, the copolymer has more comprehensive properties. The Mn of the copolymer is 23000 Mn, the Mw is 40700, and the PDI is 1.77. The glass transition temperature is 147.6℃, the initial thermal decomposition temperature (Td,5%) is 338.9℃, the refractive index is 1.6753, the Abbe number is 18.7, and the light transmittance is 86.23%.

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Relationship between degree of polymerization and optical and thermal properties of Bisphenol-A in polycarbonate polymers

Cited by 4 publications

References 1 publication

Correlation of the Abbe Number, the Refractive Index, and Glass Transition Temperature to the Degree of Polymerization of Norbornane in Polycarbonate Polymers

Correlation of the Abbe Number, the Refractive Index, and Glass Transition Temperature to the Degree of Polymerization of Norbornane in Polycarbonate Polymers

Study on the Preparation and Optical Properties of Co‐polycarbonates Based on Binaphthalene and Cardo Structures

Synthesis and Optical Properties of Co-Polycarbonate Containing Cardo Structure and Binaphthalene Structure

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