Characterization, structural transitions and properties of a tightly crosslinked polythiourethane network for optical applications

Jaffrennou, Boris; Droger, Nicolas; Halary, Jean Louis; Pascault, Jean‐Pierre; Méchin, Françoise

doi:10.1515/epoly.2005.5.1.866

Cited by 21 publications

(40 citation statements)

References 34 publications

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“…At present, PTUs are being experimented for various uses such as lenses, prisms, optical fibers, optical filters, information recording medium and light emitting diode [26][27][28][29][30][31][32][33]. Polysulphones have a high refractive index of 1.634 -1.675 and are desirable for many lens applications as they can be easily cast into thin lenses.…”

Section: Fig 5 Polystyrene Polymermentioning

confidence: 99%

“…Sulfur containing monomers are good candidates for producing high refractive index optical materials; ready polarizability of a sulfur produces a strong interaction between the material and incident light, resulting in high refractive index [55]. Sulfur containing polymers including polythiourethanes are therefore, nowadays, being developed as optical materials because of their high refractive index [26][27][28][29][30][31][32][33].…”

Section: Co-polymerization Of Monomersmentioning

confidence: 99%

“…The polythiourethanes have a high refractive index, low dispersion of refractive index and they are light weight, colorless and transparent [26][27][28][29][30][31][32][33]80]. Aliphatic or alicyclic polyisoyanates have been used alongwith thiol compounds to prepare high refractive index optical plastics having a refractive index greater than 1.60.…”

Section: Polythiourethanes As a Novel Materials For Optical Applicationsmentioning

confidence: 99%

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Development of High Refractive Index Plastics

Jha

Seshadri

Mohan³

et al. 2007

E-Polymers

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Optical plastics have been the priority area of research for material scientists worldwide, mainly, to find alternative materials to glass, a conceptual optical material in use over the years. There are numerous advantages of using plastics for optical applications, in particular for ophthalmic applications over glass. Recently, the researchers have been putting their efforts to develop novel plastic materials to meet requirements of ophthalmic industries. The present review compiles the recent developments in the area of optical plastics. The aim is to present the current state-of-the-art in the field, besides analyzing the various aspects of developing optical plastics. The review presents various possible approaches to achieve the desired properties e.g. high refractive index of the optical plastic materials.

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Section: Fig 5 Polystyrene Polymermentioning

confidence: 99%

Section: Co-polymerization Of Monomersmentioning

confidence: 99%

Section: Polythiourethanes As a Novel Materials For Optical Applicationsmentioning

confidence: 99%

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Development of High Refractive Index Plastics

Jha

Seshadri

Mohan³

et al. 2007

E-Polymers

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“…A poly(thiourethane) thermosetting system based on diisocyanate (m-xylylene diisocyanate) and a trithiol (4-sulfanylmethyl-3,6-dithiaoctane-1,8-dithiol) (398) as well as other poly(thiourethane) and poly(dithiourethane) thermosetting systems (382) for optical applications has also been studied. Moreover, ZnS/poly(thiourethane) and PbS/poly(thiourethane) nanocomposites are materials with high refractive indexes ranging from 1.57 to 2.06 (399)(400)(401). On the other hand, CdS/polythiourethane nanocomposities exhibit photocatalytic properties (402).…”

Section: Poly(thiourethane)smentioning

confidence: 99%

Sulfur‐Containing Polymers

Kultys

2010

Encyclopedia of Polymer Science and Technology

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Sulfur-containing polymers, when considering their structure, make up a complex group of macromolecular compounds of varied and often remarkable features that determine their versatile applications.The presence of sulfur atoms in polymer structure, depending on the kind of functional group, can improve some important properties, such as mechanical, electrical, and optical, and then adhesion to metals, resistance to heat, chemicals, radiation, and bacteria, biocompatibility, and so on. These are their more important functional groups: sulfide -S-, polysulfide -S n -, sulfonyl -SO 2 -, sulfinyl -SO-, sulfo -SO 3 H, as well as some organic groups containing sulfur atoms, such as thioester -Sulfur-containing polymers can be used as high performance engineering plastics, chemically stable ion-exchange membranes in electromembrane processes, proton-conducting electrolytes, as well as optical, optoelectronic, and photochemical materials. Some polymers are employed in biomedical applications, for example, sulfopolymers as biomembranes and blood-compatible materials, and polysulfates and polysulfonates as antithrombotic or antiviral agents. The presence of sulfur, particularly in the form of disulfide bridges, plays an important role in biopolymers.The purpose of this review is mainly to present recent advances in the area of sulfur-containing polymers that may not yet have commercial applications. Nevertheless, older but still significant material has been included at the beginning of the discussion of each class. Poly(monosulfide)sPolymers containing a monosulfide linkage in both the main chain and the pendent group are the subject of many detailed studies. A few reviews of the synthesis and properties of all types of polymers have been published (1-4); like the one covering polymer with sulfur in the main chain that appeared in 1992 (3). Polysulfides with controlled and well-defined structures can be easily prepared. Nevertheless, the only commercial poly(monosulfide) is Ryton [Philips Petroleum Co., poly(thio-1,4-phenylene) more frequently referred to as poly(p-phenylene sulfide) or poly(phenylene sulfide) (PPS)].

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“…Now, sulfur containing polythiourethanes are widely used as ophthalmic materials 1–6. Whereas the chemical aspects of the polymerization are quite well‐known,7–10 very few mechanical and viscoelactic characterizations have been published on such materials 11…”

Section: Introductionmentioning

confidence: 99%

Characterization of the viscoelastic and mechanical properties of tightly cross‐linked polythiourethane networks

Droger

Primel

Halary

2007

J of Applied Polymer Sci

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Both viscoelastic behavior and plastic deformation in compression were investigated on new polythiourethane networks based on diisocyanates and tri-or tetra-thiols. Dynamic mechanical analysis was used to characterize the mechanically-active a and b relaxations as a function of crosslink density and nature of the diisocyanate. Data molecular analysis on these novel materials led to conclusions in good agreement with earlier statements on the well-known epoxy-amine networks. Besides, consideration of the relaxational behavior, and especially in the b relaxation region, allowed one to interpret the plastic deformation properties of the systems under study and to predict their poor resistance to fracture. By the way, analysis of the energy required to yield permitted determination of a new characteristic temperature, T y , which can be compared to the thermomechanical main transition temperature, T a , and to the glass transition temperature, T g .

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Characterization, structural transitions and properties of a tightly crosslinked polythiourethane network for optical applications

Cited by 21 publications

References 34 publications

Development of High Refractive Index Plastics

Development of High Refractive Index Plastics

Sulfur‐Containing Polymers

Characterization of the viscoelastic and mechanical properties of tightly cross‐linked polythiourethane networks

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