danДоклады Национальной академии наук БеларусиDoklady of the National Academy of Sciences of Belarus1561-83232524-2431The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"dan-448Research ArticleТЕХНИЧЕСКИЕ НАУКИTECHNICAL SCIENCESМЕЖФАЗНЫЕ ВЗАИМОДЕЙСТВИЯ И МЕХАНИЧЕСКИЕ СВОЙСТВА СТЕКЛОАРМИРОВАННЫХ СМЕСЕЙ ПОЛИЭТИЛЕНТЕРЕФТАЛАТА С ПОЛИЭФИРНЫМ ТЕРМОЭЛАСТОПЛАСТОМINTERPHASE INTERACTIONS AND MECHANICAL PROPERTIES OF GLASS FIBER REINFORCED BLENDS OF POLYETHYLENE TEREPHTHALATE WITH THERMOPLASTIC POLYESTER ELASTOMERПесецкийС. С.PesetskiiS. S.

член-корреспондент, д-р техн. наук, профессор, заведующий отделом.

Corresponding Member, D. Sc. (Engineering), Professor. Head of the Department

otdel5mpri@tut.byШевченкоВ. В.ShevchenkoV. V.

науч. сотрудник

Researcher

mpri.shevchenko@gmail.comДубровскийВ. В.DubrovskyV. V.

науч. сотрудник

Researcher

vlad.dubrovskii@gmail.comКовальВ. Н.KovalV. N.

канд. техн. наук, заведующий сектором

Ph. D. (Engineering), Head of the Sector

Koval_mpri@tut.byИнститут механики металлополимерных систем им. В. А. Белого Национальной академии наук БеларусиV. A. Belyi Metal-Polymer Research Institute of the National Academy of Sciences of Belarus201705102017614110118Copyright © Песецкий С.С., Шевченко В.В., Дубровский В.В., Коваль В.Н., 20172017Песецкий С.С., Шевченко В.В., Дубровский В.В., Коваль В.Н.Pesetskii S.S., Shevchenko V.V., Dubrovsky V.V., Koval V.N.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://doklady.belnauka.by/jour/article/view/448

Изучено влияние добавки 0,9 мас. % диизоцианатного удлинителя цепи (УЦ) на реологические и механические свойства смесей ПЭТ/ПТЭП, армированных 30 мас. % короткого стекловолокна (СВ). Концентрацию ПТЭП в смесях варьировали от 7 до 50 мас. %, что предопределяло изменение их фазовой структуры. Композиты получали методом реакционной экструзии при использовании двухшнекового реактора-смесителя с односторонним вращением шнеков. О межфазной адгезии в системе полиэфирное связующее–поверхность СВ судили на основании микромеханических испытаний при растяжении смесевых полиэфирных матриц и стеклоармированных композитов на их основе, а также по данным релаксационной спектрометрии. Установлено, что УЦ оказывает сильное влияние на механические характеристики композитов с разной фазовой структурой, приводя к росту механической прочности при растяжении и изгибе до 1,5 раз, а также повышению ударной вязкости по Шарпи материалов до 1,6 раз. При-чинами, вызывающими данные эффекты, являются повышение средней длины CВ в композитах, содержащих УЦ, а также интенсификация межфазного адгезионного взаимодействия полиэфирного связующего с поверхностью волокон.

 

 

 

 

The effect of adding 0

The effect of adding 0.9 wt% of a diisocyanate chain extender (CE) on rheological and mechanical properties of PET/PTEP blends, reinforced with a 30 wt% short glass fiber (GF) is studied. TPEE concentration in the blends was varied from 7 wt% to 50 wt%, which affected changes in their phase structure. Composites were obtained through reactive extrusion using a twin screw mixing reactor with unidirectional screw rotation. Interfacial adhesion in the “polyester binder – GF surface” system was estimated using micromechanical tensile tests of mixed polyester matrices and glass fiber reinforced composites that are based on them, as well as using the relaxation spectrometry data. It was determined that CE has a strong effect on the mechanical properties of composites with a different phase structure, increasing their mechanical tensile and bending capabilities up to 1.5 times, and increasing Charpy impact strength of materials up to 1.6 times. The reasons for these effects are an increase in the average length of GF in composites containing CE, as well as intensified interaction between interfacial adhesive polyester binder and GF surface.

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The authors declare that there are no conflicts of interest present.