Composition optimization of PEEK/PEI blend using model-free kinetics analysis

Ramani, R.; Alam, Sarfaraz

doi:10.1016/j.tca.2010.08.012

Cited by 35 publications

(54 citation statements)

References 50 publications

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“…In nitrogen atmosphere, the heating hate of 15 °C/min promotes the polymer decomposition reactions to occur in higher temperatures, which tends to require lower activation energies. The opposite behavior observed in air atmosphere may occur due the higher heating hates of to permit lower diffusion of oxygen in the sample, demanding more energy to the thermo-oxidation process to occur 6 . The mathematical adjustment for the cited mechanism is shown in Figure 12.…”

Section: Synthetic Air Atmospherementioning

confidence: 97%

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Evaluation of decomposition kinetics of poly (ether-ether-ketone) by thermogravimetric analysis

et al. 2013

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The non-isothermal thermogravimetric methods have been used extensively for the determination of kinetic parameters in polymers. The poly (ether ketones) are used as matrix in advanced high performance composites due its high thermal stability, excellent environmental performance and superior mechanical properties. In this work, the non-isothermal decomposition kinetics of the polymer poly (ether ether ketone) (PEEK) was evaluated in nitrogen and synthetic air atmospheres, using the Flynn-Wall-Ozawa and Coats Redfern models. The results showed that the necessary time for the material decomposes in 5% is approximately 216 years if it is submitted to temperatures of 350 °C in nitrogen atmosphere. On the other hand, if the material is submitted to air atmosphere, this decomposition time drops to about 1,05 years in the same temperature and for the same conversion rate. The decomposition kinetics study by Coats Redfern showed that the D3 mechanism (three-dimensional diffusion (Jander equation)) had better adjustment to the decomposition kinetics of the material in nitrogen atmosphere, while in synthetic air the R1 mechanism (phase boundary controlled reaction (one-dimensional movement)) has better adjustment to the decomposition kinetics of the material.

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Section: Synthetic Air Atmospherementioning

confidence: 97%

“…The process is enhanced by lower heating hates, which permits greater diffusion of oxygen through the melt [6][7][8][9] . The thermogravimetric analysis has been widely used as a method for investigate the thermal decomposition of polymers and for determine their thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of decomposition kinetics of poly (ether-ether-ketone) by thermogravimetric analysis

et al. 2013

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“…1) th presence of a single Tg has been observed for all compositions, indicating a complete miscibility of all polymers in the amorphous state. The glass transition temperature changes with blend composition, and proportionally shifts from the lowest value at PEEK 100% to the highest of PEI in an almost linear fashion [3,5,6].…”

Section: Resultsmentioning

confidence: 99%

“…The blending of PEEK and PEI polymers has been considered by many scientists since it is an interesting route to combine the excellent and complementary properties of both polymers, and to achieve thermoplastic matrix material for high performance composites [5]. This goal can be reached thanks to the miscibility of opportune PEI polymers with PEEK , in the amorphous state, at all compositions [3,5,6]. The high glass transition temperature of PEI and the high melt temperature of PEEK make blends of such polymers very useful for aereonautical structural applications.…”

Section: Introductionmentioning

confidence: 99%

Microcellular foams from PEEK/PEI miscible blends

Cafiero¹,

Alfano²,

Iannone³

et al. 2016

AIP Conference Proceedings

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Abstract. Blends based on the semicrystalline Poly(ether ether ketone) -PEEK and the amorphous Poly(ether imide) -PEI have been widely investigated for their outstanding mechanical, thermal and chemical-physical properties. The conformation of the PEI monomer affects the miscibility of the blends. Although the large interest in high demanding lightweight applications, foams from PEEK/PEI blend have not been considered until recently. The aim of this work was to prepare foams from PEEK/PEI miscible blends by using supercritical carbon dioxide. The role of blend composition on the density and the morphological parameters of the resulting foams was investigated.

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“…The polymer poly(etherimide) (PEI) and PEEK are a class of high performance engineering polymers that are high temperature resistant and known to be miscible in the amorphous phase [10][11]. However, only two component alloys among these three plastic such as PEEK blending with PPS or PEI were reported in literatures [12][13][14][15][16][17][18][19]. Few research reports emphasized on ternary plastic alloys are based on PEEK.…”

Section: Introductionmentioning

confidence: 99%

Crystalline and thermal properties in miscible blends of PEEK, PPS and PEI obtained by melt compounding

Chen¹

2016

Funct.Mater.

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The effects of crystal and amorphous polymers on the structure, morphology, crystalline and thermal properties of PEEK have been investigated by using FT-IR, SEM, DSC and TGA. The interaction existing in PEEK/PPS and PEEK/PEI alloys were stronger than that in PEEK/PPS/ PEI alloys. The SEM results revealed that homogeneous structure exists in the alloys of PEEK/ PPS, PEEK/PEI and PEEK/PPS/PEI. All of the binary and ternary alloys based PEEK exhibits single glass transition temperature (Tg) in full composition range. When PEI was added to the PEEK/PPS alloys, the Tg of PEEK/PPS/PEI alloys increased from 146 °C to 179 °C. The crystallinity degree of PEEK increased when PPS or PEI was added in heating process, while increased firstly and then decreased with increasing the content of PPS or PEI in cooling process. The crystallization peak of PEEK/PPS/PEI alloy disappears in the ratio of 50/25/25. The thermal decomposition temperature (Td 5%) of PEEK/PPS and PEEK/PEI alloys decreased when PPS and PEI were added, the Td of PEEK/PPS/PEI alloy in the ratio of 70/15/15 presented at 510 °C, which was lower than pure PEEK and pure PEI, higher than PPS.Keywords: PEEK, PPS, PEI, plastic alloys, crystallization, thermal properties.Влияние кристаллических и аморфных полимеров на структуру, морфологию, кристаллические и термические свойства ПЭЭК были исследованы с помощью фурье-ИК спектроскопии, сканирующей электронной микроскопии, ДСК и ТГА. Взаимодействие компонентов в сплавах ПЭЭК/ПФС и ПЭЭК/ПЭИ проявлялось сильнее, чем в ПЭЭК/ ППС/ПЭИ. Сканирующая электронная микроскопия показала гомогенную структуру сплавов ПЭЭК/ПФС, ПЭЭК/ПЭИ и ПЭЭК/ПФС/ПЭИ. Все двойные и тройные сплавы на основе ПЭЭК проявляют только одну температуру перехода (Tg) во всем интервале составов. При добавлении ПЭИ к ПЭЭК/ПФС, Tg сплавов ПЭЭК/ПФС/ПЭИ возрастала с 146 до 179°С. Степень кристалличности ПЭЭК возрастала при добавлении ПФС и ПЭИ в процессе нагревания и снижалась при добавлении ПФС и ПЭИ в процессе охлаждения. Пик кристаллизации сплава ПЭЭК/ПФС/ПЭИ исчезает в области 50/25/25. Температура термического разложения (Td) сплавов ПЭЭК/ПФС и ПЭЭК/ПЭИ уменьшалась при добавлении ПФС и ПЭИ. Td сплава ПЭЭК/ПФС/ПЭИ в соотношении 70/15/15 была 510°С, что ниже, чем у чистых ПЭЭК и ПЭИ, но выше, чем у ПФС. 56Functional materials, 23, 1, 2016 Chen Jian-bing et al. / Crystalline and thermal properties ... Кристалічні та термічні властивості мішаних композитів ПЕЕК, ПФС та ПЕІ, отримуваних змішуванням в розплаві. Чень Цзян-бін, Го Вень-хе, Ли Чжунь-чжунь, Тянь Лі-мін Вплив кристалічних та аморфних полімерів на структуру, морфологію, кристалічні та термічні властивості ПЕЕК досліджено методами Фур'є-ІЧ спектроскопії, сканувальної елек-тронної мікроскопії, ДСК та ТГА. Взаємодія компонентів в сплавах ПЕЕК/ПФС та ПЕЕК/ ПЕІ була більш сильною, ніж в ПЕЕК/ППС/ПЕІ. Сканувальна електронна мікроскопія вия-вила гомогенну структуру сплавів ПЕЕК/ПФС, ПЕЕК/ПЕІ та ПЕЕК/ПФС/ПЕІ. Всі подвійні та потрійні сплави на основі ПЕЕК дають тільки одну температуру переходу (Tg) в усь...

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Composition optimization of PEEK/PEI blend using model-free kinetics analysis

Cited by 35 publications

References 50 publications

Evaluation of decomposition kinetics of poly (ether-ether-ketone) by thermogravimetric analysis

Evaluation of decomposition kinetics of poly (ether-ether-ketone) by thermogravimetric analysis

Microcellular foams from PEEK/PEI miscible blends

Crystalline and thermal properties in miscible blends of PEEK, PPS and PEI obtained by melt compounding

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