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Изучение технологических свойств пластизолей на основе эмульсионного ПВХ наполненных гидрофобизированным мелом

Изучение технологических свойств пластизолей на основе эмульсионного ПВХ наполненных гидрофобизированным мелом

Abstract

Baby toys are made using the centrifugal molding plastisol based emulsion of polyvinyl chloride plasticized with dioctylphthalate. To reduce cost and decrease biotelemetry the dioctylphthalate on the surface of the product domestic toys than toys produced in China, there was a necessity of introduction of the filler is chalk from different manufacturers. By using a Brookfield viscometer PV-D was studied rheology of filled hydrophobized chalk PVC plastisols in storage conditions for up to 72 hours at temperatures of 14-20°C. It was found that the flow plastisols consistent with pseudo-plastic fluids. Given the flow rates of emulsion PVC plastisols filled to 35 % of the mass. hydrophobized chalk. The influence of the content of the plasticizer dioctylphthalate in a narrow interval (37,0 41,4 % of the mass.) on the viscosity of polymer pastes and the kinetics of its changes during storage. Revealed a linear dependence of the viscosity of the filled hydrophobized chalk plastisols on the speed of rotation of the spindle of the viscometer and during storage. Given the rate of expansion changes the viscosity of the plastisols of the speed of rotation of the spindle of the viscometer, the rate of change in viscosity and calculation of the initial viscosity. Determined the stability of the dispersion hydrophobized chalk in a colloidal solution of PVC in dioctylphthalate during storage. We determined the variation of the content of chalk (ash) with top and bottom layers plastisols height 8 cm after 24 hours storage. It is proved that the temperature of the preparation and storage of polymer pastes were determining factors in the regulation of such technological properties of PVC plastisols in the presence hydrophobized chalkas viscosity, stability of the dispersion of chalk and, consequently, the efficiency of distribution plastisols in the form of a centrifugal molding.

Детские игрушки изготавливают методом центробежного формования пластизоля на основе эмульсионного поливинилхлорида пластифицированного диоктилфталатом. С целью снижения себестоимости и уменьшения выпотеваемости диоктилфталатом на поверхность изделия отечественных игрушек, по сравнению с игрушками китайского производства, возникла необходимость введения наполнителя мела разных производителей. С помощью вискозиметра Брукфильда PV-D изучалась реология наполненных гидрофобизированным мелом пластизолей ПВХ в условиях хранения до 72 часов при температуре 14-20 °С. Установлено, что характер течения пластизолей соответствовал псевдопластичным жидкостям. Приведены реологические показатели пластизолей эмульсионного ПВХ наполненных до 35 % масс. гидрофобизированным мелом. Установлено влияние содержания пластификатора диоктилфталата в узком интервале (37,041,4 % масс.) на вязкость полимерных паст и кинетику ее изменения в процессе хранения. Выявлена линейная зависимость вязкости наполненных гидрофобизированным мелом пластизолей от скорости вращения шпинделя вискозиметра и в процессе хранения. Приведены показатель кратности изменения вязкости пластизолей от скорости вращения шпинделя вискозиметра, скорости изменения вязкости и расчетная начальная вязкость. Определена стабильность дисперсии гидрофобизированного мела в коллоидном растворе ПВХ в диоктилфталате в процессе хранения. Определялся разброс содержания мела (по золе) с верха и низа слоев пластизолей высотой 8 см через 24 часа хранения. Доказано, что температуры приготовления и хранения полимерных паст являлись определяющими факторами регулирования таких технологических свойств пластизолей ПВХ в присутствии гидрофобизированного мела как вязкость, стабильность дисперсии мела и, следовательно, эффективности распределения пластизолей по форме центробежным формованием.

Keywords

РЕОЛОГИЯ,ПЛАСТИЗОЛИ ПВХ,СТАБИЛЬНОСТЬ ДИСПЕРСИИ МЕЛА

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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold