After extensive studies starting in the 1970s in relation to miscibility and piezoelectric properties, the blends of poly(vinylidene fluoride) (PVDF) and poly(methyl methacrylate) (PMMA) have been revisited with the aim of assessing their mechanical behavior. Depending on the amount of PVDF, either amorphous or semicrystalline blends are produced. Typically, the blends remain amorphous when their PVDF content does not exceed 40 wt. %. Blend composition influence on the values of the glass transition temperature, Tg, and on its mechanical expression, Tα, is extensively discussed. Then, emphasis is put on the stress-strain behavior in tension and compression over the low deformation range covering the elastic, anelastic, and viscoplastic response. The reported data depend, as expected, on temperature and strain rate and also, markedly, on blend composition and degree of crystallinity. Molecular arguments, based on the contribution of the glass transition motions are proposed to account for the observed behavior. Thanks to the understanding of phenomena at the molecular level, accurate models can be selected in the view of mechanical modeling.

References

References
1.
Noland
,
J. S.
,
Hsu
,
N. N. C.
,
Saxon
,
R.
, and
Schmitt
,
J. M.
, 1971, “
Compatible High Polymers: Poly(vinylidene fluoride) Blends With Homopolymers of Methyl and Ethyl Methacrylate
,”
Adv. Chem. Ser.
,
99
, pp.
15
28
.
2.
Nishi
,
T.
, and
Wang
,
T. T.
, 1975, “
Melting Point Depression and Kinetic Effects of Cooling on Crystallisation in Poly(vinylidene fluoride)-Poly(methyl methacrylate) Mixtures
,”
Macromolecules
,
8
, pp.
909
915
.
3.
Patterson
,
G. D.
,
Nishi
,
T.
, and
Wang
,
T. T.
, 1975, “
Brillouin Scattering From Poly(vinylidene fluoride)-Poly(methyl methacrylate) Mixtures
,”
Macromolecules
,
9
, pp.
603
605
.
4.
Nishi
,
T.
, and
Wang
,
T. T.
, 1977, “
Spherulitic Crystallization in Compatible Blends of Poly(vinylidene fluoride) and Poly(methyl methacrylate)
,”
Macromolecules
,
10
, pp.
421
425
.
5.
Léonard
,
C.
,
Halary
,
J. L.
,
Monnerie
,
L.
,
Broussoux
,
D.
,
Servet
,
B.
, and
Micheron
,
F.
, 1983, “
FTIR Evidence of Beta Crystal Phase Formation in Poly(vinylidene fluoride)/Poly(methyl methacrylate) Blends
,”
Polym. Commun.
,
24
, pp.
110
114
.
6.
Léonard
,
C.
,
Halary
,
J. L.
,
Monnerie
,
L.
, and
Micheron
,
F.
, 1984, “
DSC Studies of the Transitions in Poly(vinylidene fluoride) and Some Related Copolymers
,”
Polym. Bull.
,
11
, p.
195
202
.
7.
Saito
,
K.
,
Miyata
,
S.
,
Wang
,
T. T.
,
Jo
,
Y. S.
, and
Chujo
,
R.
, 1986, “
Ferroelectric Properties of a Copolymer of Vinylidene Fluoride and Trifluoroethylene Blended With Poly(methyl methacrylate)
,”
Macromolecules
,
19
, pp.
2450
2452
.
8.
Léonard
,
C.
,
Halary
,
J. L.
, and
Monnerie
,
L.
, 1988, “
Crystallization of Poly(vinylidene fluoride)-Poly(methyl methacrylate) Blends: Analysis of the Molecular Parameters Controlling the Nature of Poly(vinylidene fluoride) Crystalline Phase
,”
Macromolecules
,
21
, pp.
2988
2994
.
9.
Faria
,
O.
, and
Moreira
,
R. L.
, 1999, “
Structural and Kinetic Transitions in Poly(vinylidene fluoride-trifluoroethylene)/Poly(methyl methacrylate) Blends
,”
Polymer
,
40
, pp.
4465
4471
.
10.
Jarray
,
J.
,
Ben Cheikh Larbi
,
F.
,
Vanhulle
,
F.
,
Dubault
,
A.
, and
Halary
,
J. L.
, “
Thermal and Mechanical Behaviour of Amorphous and Semicrystalline Poly(vinylidene fluoride)/Poly(methyl methacrylate Blends
,”
Macromol. Symp.
,
198
, pp.
103
116
.
11.
Jarray
,
J.
, 2005, Ph.D. thesis, “Crystallization Effects on the Thermomechanical Properties of Poly(vinylidene fluoride) -Poly(methyl methacrylate) Blends” (in French), Specialty Physics, University Tunis El Manar, Tunisia.
12.
Halary
,
J. L.
,
Lauprêtre
,
F.
, and
Monnerie
,
L.
, 2011,
Polymer Materials: Macroscopic Properties and Molecular Interpretations
,
Wiley, Hoboken
.
13.
Experiments carried out by one of us (JJ) at the Ecole des Mines de Nancy (France) with the kind collaboration of JM Hiver, A Dahoun and C G’Sell.
14.
G’Sell
,
C.
,
Hiver
,
J. M.
, and
Dahoun
,
A.
, 2002, “
Experimental Characterization of Deformation Damage in Solid Polymers Under Tension and Its Interrelation With Necking
,”
Int. J. Solids Struct.
39
, pp.
3857
3872
.
15.
Jenckel
,
E.
, and
Heusch
,
R.
, 1953, “
Die Erniedrigung der Einfriertemperatur organischer Gläser durch Lösungsmittel
,”
Kolloid Z.
130
, pp.
89
105
(in German).
16.
Dubault
,
A.
,
Bokobza
,
L.
,
Gandin
,
E.
, and
Halary
,
J. L.
, 2003, “
Effects of Molecular Interactions on the Viscoelastic and Plastic Behavior of Plasticized Poly(vinyl chloride)
,”
Polym. Int.
52
, pp.
1108
1118
.
17.
Koberstein
,
J.
,
Morra
,
B.
, and
Stein
,
R. S.
, 1980, “
The Determination of Diffuse-Boundary Thicknesses by Small-Angle X-Ray Scattering
,”
J. Appl. Crystallogr.
,
13
, pp.
34
45
.
18.
Enns
,
J. B.
, and
Simha
,
R. J.
, “
Transitions in Semicrystalline Polymers. I. Poly(vinyl fluoride) and Poly(vinylidene fluoride)
,”
Macromol. Sci. B
,
13
, p.
11
24
.
19.
Monnerie
,
L.
,
Halary
,
J. L.
, and
Kausch
,
H. H.
, 2005,
“Deformation, Yield and Fracture of Amorphous Polymers: Relation to the Secondary Transition,” “Intrinsic Mobility and Toughness of Polymers I,”
Adv. Polym. Sci.
,
187
, pp.
215
364
.
20.
Robertson
,
R. E.
, 1966, “
Theory for the Plasticity of Glassy Polymers
,”
J. Chem. Phys.
,
44
, pp.
3950
3956
.
21.
Studies currently in progress, in kind cooperation with R. Matadi, N. Bahlouli, S. Ahzi, and Y. Rémond at IMFS Strasbourg (France).
22.
Ree
,
T.
, and
Eyring
,
H.
, 1955, “
Theory of Non-Newtonian Flow. I. Solid Plastic System
,”
J. Appl. Phys.
,
26
, pp.
793
800
.
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