In situ compatibilization of polypropylene–polyethylene blends: a thermomechanical and spectroscopic study

Tselios, Ch.; Bikiaris, Dimitrios N.; Maslis, V; Panayiotou, Costas

doi:10.1016/s0032-3861(98)00132-3

Cited by 71 publications

(54 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Their mixtures exhibit very moderate and unpredictable mechanical properties, due to their influence on many parameters, such as morphology and crystallinity. To improve theses properties, physical or chemical compatibilizers, such as block (or graft) copolymers, or in-situ reactive compatibilizers, have been added to the blend [1][2][3][4][5][6][7]. These compatibilizers contribute to the reduction of interfacial tension, and facilitate the dispersion, stabilize the generated morphology against modification during the processing steps and, in addition, enhance the adhesion between the polymers phases.…”

Section: Introductionmentioning

confidence: 99%

Effect of compatibilizing agents on the physical properties of iPP/HDPE organoclay blends

Boufassa

Doufnoune

Hellati

et al. 2013

Journal of Polymer Engineering

View full text Add to dashboard Cite

Abstract Blends of isotactic polypropylene (iPP) and high density polyethylene (HDPE), with and without compatibilizers and with different organoclay amounts (1%, 3%, and 5%), were systematically investigated to assess the effect of the additives on the crystallinity of the blends, as well as the correlation between the microhardness, H and the Young’s modulus E. The compatibilizers used were: maleic anhydride grafted styrene ethylene butadiene styrene (SEBS-g-MAH), maleic anhydride grafted polyethylene (PE-g-MAH), maleic anhydride grafted polypropylene (PP-g-MAH), ethylene propylene diene monomer (EPDM), and maleic anhydride grafted EPDM (EPDM-g-MAH). The thermal properties and crystallization behavior were determined by differential scanning calorimetry (DSC) and wide angle X-ray scattering (WAXS). Macro- and micromechanical properties were also investigated. The results obtained showed that the addition of clay slightly increases the crystallinity αWAXS of the blends. However, the hardness H decreases enormously only by adding 1 wt% of clay. With higher clay amounts, H increases again. The relationship between the Young’s modulus E and the hardness H for all the studied blends was found to be somewhat higher than the one obtained for polyethylene (PE) samples with different morphologies.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of compatibilizing agents on the physical properties of iPP/HDPE organoclay blends

Boufassa

Doufnoune

Hellati

et al. 2013

Journal of Polymer Engineering

View full text Add to dashboard Cite

show abstract

“…Blends based on polyolefins have been compatibilized by reactive extrusion, where functionalized polyolefins are used to form copolymers at the interface to improve the compatibility between the components and the adhesion between the phases. Maleic anhydride grafted polyolefins are the most useful blends for the above purpose 15–17…”

Section: Introductionmentioning

confidence: 99%

Miscibility and crystallization behavior of poly(ethylene‐co‐vinylalcohol)/poly(maleic anhydride‐alt‐ethylene) blend

Aouak

Alarifi

Ouladsmane

2012

J of Applied Polymer Sci

View full text Add to dashboard Cite

The miscibility of poly(vinylalcohol‐co‐ethylene) (PEVA) with poly(ethylene‐alt‐maleic anhydride) (PEMAH) blends was investigated over a wide range of compositions by viscosimetry and DSC analyses using Krigbaum–Wall and Kwei approaches. The results revealed that the blends were completely miscible in all proportions due to the specific interactions between the hydroxyl groups of PEVA and the carbonyl groups of PEMAH. From Nishi equation, the interaction parameter of Flory was found to be −0.89. The nonisothermal crystallization behavior and kinetics of this system were also investigated and compared with those of the pure PEVA. There were strong dependencies of the degree of crystallinity (XT), peak crystallization temperature (Tp), half time of crystallization (t1/2), and Ozawa exponent (m) on PEMAH content and cooling rate. The crystallization activation energy (Ec) that was calculated from Kissinger model increased with increasing PEMAH composition in the blend. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

show abstract

“…However, most of previous studies, if not all, mainly focus on the phase structure and the composition of the alloy, and try to correlate them with either the polymerization mechanisms or the mechanical properties of the material. 1,2,[8][9][10][11][12][13] The crystallization and melting behavior of PP in the in-reactor alloy has been seldom reported.…”

Section: Introductionmentioning

confidence: 99%

The dynamic crystallization and multiple melting behavior of polypropylene in the in‐reactor alloy: A differential scanning calorimetry study

Zhu

Yang

Zhao

et al. 2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

The isothermal and nonisothermal crystallization and the subsequent melting behaviors of the polypropylene (PP) component in the in-reactor alloy were studied systematically by a series of thermal analysis techniques. The alloy sample used in the present study is a newly invented in situ blend of polypropylene with high ethylene-propylene rubber content. The effect of annealing temperatures on the subsequent crystallization and melting process of PP was explained by the different molecular behavior in the three ''temperature domains.'' Multiple melting endotherms were also observed for the nonisothermally crystallized sample, and were attributed to the dynamic melting process which consists of three steps: melting, recrystallization, and remelting. The melting temperature of initial mesomorphic phase is found to be very close to the temperature of recrystallization or reorganization. To separate the recrystallization process from the overlapping processes, the difference spectra of fast and slow heated DSC endotherms were used, which is based on a straight forward but reasonable assumption. In addition, temperature modulated differential scanning calorimetry (TMDSC) has also been used to study the melting of PP component.

show abstract

In situ compatibilization of polypropylene–polyethylene blends: a thermomechanical and spectroscopic study

Cited by 71 publications

References 59 publications

Effect of compatibilizing agents on the physical properties of iPP/HDPE organoclay blends

Effect of compatibilizing agents on the physical properties of iPP/HDPE organoclay blends

Miscibility and crystallization behavior of poly(ethylene‐co‐vinylalcohol)/poly(maleic anhydride‐alt‐ethylene) blend

The dynamic crystallization and multiple melting behavior of polypropylene in the in‐reactor alloy: A differential scanning calorimetry study

Contact Info

Product

Resources

About