1070-4272/04/7708-1345 C 2004 MAIK [Nauka/Interperiodica]
Russian Journal of Applied Chemistry, Vol. 77, No. 8, 2004, pp. 1345!1350. Translated from Zhurnal Prikladnoi Khimii, Vol. 77, No. 8, 2004,
Original Russian Text Copyright + 2004 by Bichuch, Izvozchikova, Zaitsev, Kronman, Semchikov.
AND POLYMERIC MATERIALS
Behavior of Binary and Ternary Systems Based
on Poly(Vinyl Chloride), Poly(Methyl Methacrylate),
and Their Copolymers
N. A. Bichuch, V. A. Izvozchikova, S. D. Zaitsev, A. G. Kronman, and Yu. D. Semchikov
Research Institute for Radio Engineering, Nizhni Novgorod, Russia
Research Institute of Chemistry, Lobachevsky State University, Nizhni Novgorod, Russia
Lobachevsky State University, Nizhni Novgorod, Russia
Sibur-Neftekhim Joint-Stock Company, Dzerzhinsk, Nizhni Novgorod oblast, Russia
Received April 15, 2004
Abstract-Mechanical properties, optical transmission, surface topography, and dielectric loss are studied
for films formed by blends of polymers of vinyl chloride and methyl methacrylate with their copolymers.
The development of new polymeric materials based
on blends of large-scale polymers is one of the most
promising areas of research on the way to modifica-
tion of properties of polymers. In this context, a major
interest was focused on the system poly(methyl meth-
acrylate) (PMMA)3poly(vinyl chloride) (PVC), which
has been studied in detail by 2D NMR spectroscopy,
differential scanning calorimetry, X-ray diffraction ,
electron microscopy , and microcalorimetry [3, 4].
It was concluded in most studies that PMMA and
PVC are incompatible [1, 537]. In particular, Li et al.
 have drawn such a conclusion on the basis of the
fact that two glass transition temperatures were found
over the entire composition range of the blends. Our
thought is that the compatibility of this pair of poly-
mers can be improved by introducing a third compo-
nent, vinyl chloride (VC)/methyl methacrylate (MMA)
copolymer, into the system. Therefore, the goal of this
study was to examine in detail blends of VC and
MMA homopolymers with VC/MMA copolymer.
Homopolymerization of VC and MMA and copoly-
merization of these monomers were carried out by
the suspension method in a specially designed 3.5-l
laboratory autoclave equipped with a 200-rpm impel-
ler agitator, a doser, a sampler, and a cooling jacket.
The MMA and VC monomers met the requirements
of GOST (State Standard) 20370374 and TU (Techni-
cal Specifications) 6-01-14390. The content of the
main component in both cases was no less than 99.9%.
In synthesis of PVC and VC-rich copolymers, we used
as an emulsifier F-50 hydroxypropyl methyl cellulose
(HPMC) containing 28.5 wt % methoxy groups and
7.0 wt % hydroxypropyl groups. In preparation of
PMMA and MMA-rich copolymers, we used the sa-
ponification product of the copolymer of methacrylic
acid (78.8 wt %) and MMA (21.2 wt %). As initiators
we used di-2-ethylhexyl peroxydicarbonate (EHPC)
and lauryl peroxide (LP), and as chain-terminating
agents, 0.2 wt % lauryl mercaptans (in preparation of
MMA-rich copolymers) and 0.75 wt % trichloroeth-
ylene (TCE) (in preparation of VC-rich copolymers).
The liquor ratio (water to monomer ratio) was 2 : 1
and 5 : 1 in VC- and MMA-rich systems, respectively.
The synthesis of PMMA with low (<10 wt %) VC
content was carried out at 80oC. In this case, the re-
action mass was rapidly cooled after 133 h. The syn-
thesis of PVC and VC-rich copolymers was performed
at 66oC until the pressure in the autoclave decreased
by 0.5 atm, which corresponded to a 75% consump-
tion of VC. Copolymers with increased degree of
homogeneity (DH) were obtained by stepwise addition
of the more reactive monomer, MMA, under nitrogen
pressure. To the initial mixture of VC (800 g) and
MMA (40 g), three 40-g portions of MMA were added
at 3.5-h intervals. The polymers were separated from
the mother liquor on a Buchner funnel, washed with
distilled water, and dried in an oven at 60oC. The con-
version was determined gravimetrically. The composi-
tion of the VC/MMA copolymers was determined