Russian Journal of Applied Chemistry, 2010, Vol. 83, No. 6, pp. 1115−1120.
Pleiades Publishing, Ltd., 2010.
Original Russian Text
E.O. Koval’, V.V. Kolyagin, I.G. Klimov, E.A. Maier, 2009, published in Khimicheskaya Promyshlennost’, 2009, Vol. 86, No. 6,
TECHNOLOGY OF ORGANIC
AND INORGANIC CHEMISTRY
Investigation of the Inﬂ uence of Technological Factors
on Quality of Basic Brands of HPPE
E. O. Koval’, V. V. Kolyagin, I. G. Klimov, and E. A. Maier
“Tomskneftekhim” Ltd., Tomsk, Russia
Received October 4, 2009
Abstract—The comparative analysis of the molecular mass distribution, temperatures and heat effect of phase
transitions, degree of crystallinity of defect materials and matrix polyethylene ﬁ lm were carried out. Possible
reasons of deterioration of the quality of polyethylene on stages of its synthesis, transportation, storage, and
processing were determined.
The problems of maintenance and control of
the quality of products in market time have topical
importance for producers in all respects, starting from
premium prices to forming of good image for consumers,
and ending with prospective sales market. At the same
time the qualiﬁ cation of some processors increased
so that beside GOST certiﬁ cates of the quality the
information on the molecular structural characteristics
of polymers is requested.
Therefore, in performing the program of modernization
of HPPE production, ﬁ rst of all the laboratory of
technological control was equipped to provide climatic
conditions by temperature and humidity in order to
achieve necessary accuracy during the analysis of raw
material and ready product; the laboratory was also
furnished with modern analytic devices and equipment.
Thus, gas chromatographs Agilent 6850 and Fokus
were introduced to determine impurities in ethylene,
propylene, and return gas; extrusion and pressing
equipment of Collin were introduced for production of
testing samples of materials as well as a range of special
devices that allowed to make the quality control process
of polymers from selective to total.
The percentage of production of ﬁ lm brands of
polymer is the macro characteristic of HPPE quality, the
classiﬁ cation is made on the basis of quantitative content
of helices, ﬁ bers, and other foreign matters according to
procedure by GOST 16337. During the implementation
of the program of quality improvement the procedure
for minimizing these defects was used on plants for
elaboration of polypropylene ﬁ lm brands like BOPP,
ﬁ lms and block copolymer of propylene and ethylene
for isolating ﬁ lms [1,2]; the main point of this procedure
is in comparative analysis of molecular structural
characteristics of defects and surrounding matrix ﬁ lm,
determination of possible stages of technological
process generating the formation of the defect materials,
modeling of given defects on model mixtures in order to
obtain quantitative ratio, elaboration and introduction of
recommendations into manufacturing practice.
Defects of the ﬁ lm which had a form of helices
and ﬁ bers were separated from tubular ﬁ lm produced
by blown extrusion from high-pressure polyethylene
brands 15303-003 and 15803-020 (further 153 and 158,
respectively) and model mixtures.
The molecular mass and molecular mass distribution
of polymers were determined by high-temperature
gel-permeation chromatography (GPC) with the use
of gel-chromatograph Waters 150C in combination
with differential viscometer Viscotek Model 100 at the
temperature of 140°C in 1,2,4-trichlorobenzene (TCB)
eluent with stabilizer.
Infrared spectra of polymers were recorded on Fourier
spectrometer FTIR-8400S produced by SHIMADZU.
The content of vinyl, vinylidene, and trans-vinyl groups
was determined from the absorption bands at 908, 964