Orientation and relaxation in uniaxially stretched poly(methyl methacrylate)-poly(styrene-co-acrylonitrile) compatible blends

Oultache, A. K.; Zhao, Yue; Jasse, B.; Monnerie, L.

doi:10.1016/0032-3861(94)90862-1

Cited by 14 publications

(11 citation statements)

References 19 publications

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“…Stress-relaxation measurements carried out by have shown that the aging rate of a (50/50) PMMA/SAN blend was similar to that of PMMA rather than being intermediate between the two components. This was attributed to the PMMA component being more responsive to the mechanical stresses than SAN, a conclusion that is consistent with spectroscopic measurements of stressed blends indicating that PMMA is more oriented than the SAN component (Oultache et al 1994). …”

Section: Mechanical Relaxationsupporting

confidence: 72%

Physical Aging of Polymer Blends

Cowie

Arrighi

2014

Polymer Blends Handbook

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Section: Mechanical Relaxationsupporting

confidence: 72%

Physical Aging of Polymer Blends

Cowie

Arrighi

2014

Polymer Blends Handbook

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“…However, it was completely miscible with SAN containing 23% AN 16. Furthermore, it is generally known that SAN/PMMA blends are miscible when the weight fraction of AN monomeric units in the SAN copolymer is between 9 and 30% 41–43. In this study, with the SAN10 copolymer containing 24.5% AN, PMMA could be incorporated into the ABS phase.…”

Section: Resultsmentioning

confidence: 85%

Weld‐line characteristics of polycarbonate/acrylonitrile–butadiene–styrene blends. I. Effect of the processing temperature

Lim

Park

2004

J of Applied Polymer Sci

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ABSTRACT:The effects of the processing temperature on the morphology and mechanical properties at the weld line of 60/40 (w/w) polycarbonate (PC)/acrylonitrile-butadiene-styrene (ABS) copolymer blends were investigated. The influences of the incorporation of poly(methyl methacrylate) (PMMA) as a compatibilizer and an increase in the viscosity of the dispersed ABS domain phase were also studied. The ABS domain was well dispersed in the region below the V notch, and a coarse morphology in the core region was observed. When tensile stress was applied perpendicularly to the weld line, the fracture propagated along the weak region behind the weld part; there, the domain phase coalescence was significant because of the poor compatibility between PC and styrene-acrylonitrile (SAN). Phase coalescence became severe, and so the mechanical strength of the welded specimen decreased with an increasing injection-molding temperature. The domain morphology became stable and the mechanical strength increased as the viscosity of the domain phase increased or some SAN was replaced with PMMA. That the morphology was well distributed behind the weld line and the mechanical properties of PC/ABS/PMMA blends were improved was attributed to the compatibilizing effect of PMMA.

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“…Previously, the conformation of a repeat unit of uniaxially oriented atactic PSt was assumed; angle γ between the transition dipole moment vector of the out‐of‐plane vibration of the phenyl ring and the chain axis was determined by plotting the orientation function of the main chain f m as a function of the dichroic ratio of the experimentally obtained out‐of‐plane vibration as

f_{normalm} = true(\frac{D_{normals} - 1}{D_{normals} + 2} true) \times true(\frac{D_{0 s} + 2}{D_{0 s} - 1} true)

where D s is the measured dichroic ratio of the absorbing group, and

D_{0 s} = 2 \cot^{2} γ

. In the same manner, the angles between the transition dipole moment vectors of an absorbing group and the chain axis were determined in polymers such as PMMA , atactic PSt , poly(styrene‐acrylonitrile) , poly(vinyl phenol) , and poly(2,6‐dimethyl 1,4‐phenylene oxide) .…”

Section: Resultsmentioning

confidence: 99%

“…where D s is the measured dichroic ratio of the absorbing group, and D 0s 52cot 2 c. In the same manner, the angles between the transition dipole moment vectors of an absorbing group and the chain axis were determined in polymers such as PMMA [13], atactic PSt [25], poly(styrene-acrylonitrile) [26], poly(vinyl phenol) [27], and poly(2,6-dimethyl 1,4-phenylene oxide) [28].…”

Section: Investigation Into the Mechanisms Of Birefringence Generationmentioning

confidence: 99%

Mechanisms of orientational and photoelastic birefringence generation of methacrylates for the design of zero–zero‐birefringence polymers

Shafiee

Beppu

Iwasaki

et al. 2015

Polymer Engineering & Sci

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The intrinsic birefringence Dn 0 and photoelastic coefficient C of poly(methyl methacrylate), poly(2,2,2-trifluroethyl methacrylate), poly(phenyl methacrylate), and poly(2,2,3,3,3-pentafluorophenyl methacrylate) were determined. We categorized these methacrylate polymers into four birefringence-types, even though their molecular structures differed only by the substituents on the side chains. Based on the results of Dn 0 and C, novel polymers that exhibit neither orientational nor photoelastic birefringence, i.e., zero-zero-birefringence polymers, were designed and synthesized by quaternary copolymerization system. Furthermore, we confirmed that the mechanisms of orientational birefringence and photoelastic birefringence generation were different in these methacrylate polymers. The conformation of the repeat unit of the polymers was nearly constant during the generation of orientational birefringence. In contrast, the conformation of the repeat unit of the polymers changed during the generation of photoelastic birefringence in the glassy state. These findings demonstrated the reasonability of evaluating orientational and photoelastic birefringence separately, as well as the adequacy of the classification of polymers into four birefringence-types. Given these results and the fact that zero-zero-birefringence polymers could be prepared successfully by four-birefringence type monomers, we demonstrated the reasonability of the method for designing the zero-zero-birefringence polymers. POLYM. ENG. SCI., 55:1330SCI., 55: -1338SCI., 55: , 2015

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Orientation and relaxation in uniaxially stretched poly(methyl methacrylate)-poly(styrene-co-acrylonitrile) compatible blends

Cited by 14 publications

References 19 publications

Physical Aging of Polymer Blends

Physical Aging of Polymer Blends

Weld‐line characteristics of polycarbonate/acrylonitrile–butadiene–styrene blends. I. Effect of the processing temperature

Mechanisms of orientational and photoelastic birefringence generation of methacrylates for the design of zero–zero‐birefringence polymers

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