Photoelastic properties of plasticised polymethyl methacrylate in the glassy state

Lamble, J. H.; Dahmouch, E S

doi:10.1088/0508-3443/9/10/302

Cited by 19 publications

(4 citation statements)

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“…They found that initial linear elastic regime shrinks with the increase of solvent content indicating that the presence of solvents partially “melts” these rigid segmental correlations in T g –T ll range. Strain optical constant decreases with increasing the solvent content while the photoelastic constant increases which shows the similar affects in the case of plasticized polymethyl methacrylate 40 …”

Section: Introductionsupporting

confidence: 61%

“…Strain optical constant decreases with increasing the solvent content while the photoelastic constant increases which shows the similar affects in the case of plasticized polymethyl methacrylate. 40 The effect of nanoparticles on the mechano-optical behavior of polyethylene naphthalate (PEN) was also investigated by Kanuga 41 and large deformation stress-optical behavior revealed that there are at most three distinct regimes that may be augmented by an initial additional glassy component at lower temperatures and/or high rates. They concluded that the presence of nanoparticles did not change the birefringence development of PEN before the onset of strain induced crystallization.…”

mentioning

confidence: 99%

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Mechano‐opticalbehavior in poly (ethylene terephthalate)/poly (ether imide) blends

Mutlu

Jain

Yook

et al. 2021

Journal of Polymer Science

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Mechano-optical behavior and related structural evolution during uniaxial stretching of melt miscible poly (ethylene terephthalate) (PET)/poly (ether imide) (PEI) blends were studied near their glass transition temperature using an instrumented machine that measures true stress, true strain and spectral birefringence simultaneously. Stretching from amorphous state, two distinct stress-optical regimes were observed at temperatures between T g and T cc (cold crystallization).Near T g , a typical photoelastic behavior persists until a critical temperature above which temperature independent initial stress optical behavior is observed. At those temperatures above T g , where glassy behavior is observed, decreasing stretching rate was also found to eliminate this glassy photo elastic regime leading to the observation of a linear initial stress optical behavior that becomes temperature independent as expected from linear stress optical rule. Increasing PEI concentration in the blends suppresses crystallizability and increases temperature at which initial elastic region disappears giving way to pure liquid behavior where linear stress optical behavior is observed. This is attributed to the increase and broadening of the glass transition temperature with the addition of noncrystallizable PEI. In PET/PEI blends, the stress-optical coefficient (SOC), determined in a linear stress optical regime, was found to increase linearly with the increase in PEI concentration.

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Section: Introductionsupporting

confidence: 61%

mentioning

confidence: 99%

Mechano‐opticalbehavior in poly (ethylene terephthalate)/poly (ether imide) blends

Mutlu

Jain

Yook

et al. 2021

Journal of Polymer Science

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“…The strain optical constant decreases with increasing the solvent content while the photoelastic constant increases. This behavior is similar to the effect of plasticizer in PMMA and PEG [58]. Unlike the latter systems, photoelastic constant increases nonlinearly with solvent concentration.…”

Section: Solvent Effect On Mechano-optical Behaviorsupporting

confidence: 62%

Real time optical and mechano-optical studies during drying and uniaxial stretching of Polyetherimide films from solution

Jiang¹,

Cakmak²

2015

Polymer

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a b s t r a c tIn order to have a fundamental understanding of the temporal evolution of physical characteristics of Polyetherimide (PEI) film and processing parameters, real time measurements are essential. Because drying and stretching processes of solvent-cast polymer film are complex, off line measurements are unable to reveal the temporally varying detailed information, especially for fast "transient events". To solve the problem, two measurement systems, one for drying that tracks real time thickness, weight, surface temperature, in-plane and out-of-plane birefringence of solution casting film, and another for uniaxial stretching that tracks real time true stress, true strain and birefringence of stretched film are used. By using these systems, we are able to systematic investigate the development of optical anisotropy through in and out of plane birefringence monitoring drying of solution cast films and their mechanooptical behavior during stretching, and quantify the influence of solvent N-methyl-2-pyrrolidinone (NMP) on these relationships.

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“…(1). For PMMA, Lamble et al [45] have demonstrated that the refractive index and the stress-optic coefficient increase linearly for increasing content of the plasticizer dibutyl phthalate (DBP). By using DBP with n DBP = 1.4925 ≈ n PMMA = 1.4909, they ensured that this effect was mainly due to plasticization and not a refractive index binary mixture effect.…”

Section: Etching Of Mpofbgsmentioning

confidence: 99%

Effects of Solvent Etching on PMMA Microstructured Optical Fiber Bragg Grating

Janting

Pedersen

Inglev

et al. 2019

J. Lightwave Technol.

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Photoelastic properties of plasticised polymethyl methacrylate in the glassy state

Cited by 19 publications

References 4 publications

Mechano‐opticalbehavior in poly (ethylene terephthalate)/poly (ether imide) blends

Mechano‐opticalbehavior in poly (ethylene terephthalate)/poly (ether imide) blends

Real time optical and mechano-optical studies during drying and uniaxial stretching of Polyetherimide films from solution

Effects of Solvent Etching on PMMA Microstructured Optical Fiber Bragg Grating

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