Interfacial behaviour of compatibilizers in polymer blends

Tang, Tao; Huang, Baotong

doi:10.1016/0032-3861(94)90691-2

Cited by 117 publications

(81 citation statements)

References 12 publications

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“…The constant K can be expected to increase with the segment sizes of the compatibilizer and decrease with the degree of compatibilizer self-association in the blend. 17 The value of K was higher for graft copolymer SE020, as compared to the value of SE018, in both PA-6 and PA-12 blends. This implies that SE020 is a more efficient compatibilizer than SE018.…”

Section: Pa Domain Sizementioning

confidence: 93%

Poly(styrene‐graft‐ethylene oxide) as a compatibilizer in polystyrene/polyamide blends

Jannasch¹,

Wesslén²

1995

J of Applied Polymer Sci

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SYNOPSISPolystyrene (PS) blends containing a dispersed phase of either polyamide-6 (PA-6) or were compatibilized by additions of 1, 3, or 5 wt % poly(styrenegraft-ethylene oxide). The graft copolymers were found to have a stabilizing effect on the domain sizes. Weight average radii of PA-6 domains in compression molded samples were reduced by a factor of 5 with 3 wt % graft copolymer added. The corresponding size reduction for PA-12 domains was by a factor of 3. Also, the domain sizes were more uniformly distributed in blends containing the graft copolymers. Thermal analysis of the blends revealed that compatibilization retarded the PA crystallization, with some PA crystallizing at the PS glass transition. This retarded crystallization is explained as a result of the domain size reduction and by the presence of graft copolymer at the interface. The graft copolymers had a toughening effect on the blends and the impact strength of a PSIPA-12 blend was improved by 65% by adding 3 wt % of graft copolymer. Binary blends of the PA and poly(ethy1ene oxide) (PEO) were investigated in a separate study to verify miscibility of the graft copolymer side chains and the PA. Hydrogen bonding between PA-6 and PEO was confirmed by IR spectroscopy and partial miscibility was indicated by melting point depressions.

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Section: Pa Domain Sizementioning

confidence: 93%

Poly(styrene‐graft‐ethylene oxide) as a compatibilizer in polystyrene/polyamide blends

Jannasch¹,

Wesslén²

1995

J of Applied Polymer Sci

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“…For such purpose, the third phase such as SMA copolymer or DGEBA epoxy resin [12,15] were used as compatibilizer and added into the blend system of PA 6 and toughening phase. The compatibilizer usually exits in the interface of matrix and dispersed phase [16][17]. The reason of compatibilizer improving the impact strength of blend is due to the chemical reaction between maleic anhydride (MAH) which exists in the interface and the end amino group of PA 6.…”

Section: Introductionmentioning

confidence: 99%

Study of Mechanical Properties and Morphology of PA 6/PO Blends Compatibilized by PO Grafted with Itaconic Acid

2007

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Abstract:Two different types of polyolefine (PO) grafted with itaconic acid as a reactive compatibilizer, polypropylene (PP) grafted with itaconic acid (PP-g-ITA) and high density polyethylene (HDPE) grafted with itaconic acid (HDPE-g-ITA), PP and HDPE grafted with copolymer of itaconic acid and styrene (PP-g-(ITA-St) and HDPE-g-(ITA-St)) were prepared by melt graft technique through reactive type twin-screw extruder. FT-IR and thermal analysis were used to characterize the structure of the graft copolymer. The graft ratio (GR) and melt flow rate (MFR) were determined by non-aqueous titration and melt flow rate analyzer. The effect of the concentration of monomer and initiator dosage on GR and MFR of graft copolymer were studied. Then polyamide 6 (PA 6) blends, PA 6/PP (PA 6/HDPE), that compatibilized with PP-g-ITA (HDPE-g-ITA) were prepared. The morphology of the blends was analyzed by SEM, DSC and Molau tests and the mechanical properties of which were characterized by tensile, impact, and bend tests. The results of mechanical property showed that the impact strength of blends was increased by 50% and 70% after PP-g-ITA and HDPE-g-ITA was used as compatibilizer, but the MFR of blends was decreased. The SEM photographs indicated that the accession of compatibilizer obviously improved binding state between two phases in blends, the size of dispersed phase was reduced evidently and the interface became indistinct. DSC results demonstrated that in the case of PP-g-ITA, glass temperature (T g ) of PA 6 matrix in blends was ascended, melt point (T m ) was improved a little, crystallinity (X c ) was decreased, T m and X c of PP phase was increased; With the accession of HDPE-g-ITA, T m of PA 6 matrix and HDPE phase had almost no change, X c of PA 6 matrix was decreased and X c of HDPE phase was increased.

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“…So we like to compare our simulation results to their theory. According to the theory of the Tang and Huang 20) , the average radius of the dispersed phase R can be expressed as following when the concentration of the copolymer is C,…”

Section: Comparison With the Theories Of Tang And Huangmentioning

confidence: 99%

“…Noolandi et al [8][9][10][11] and Huang et al 20) have proposed statistical thermodynamic theories concerning the emulsifying effect of copolymers. The theories of Noolandi et al can be applied to the case of highly incompatible systems when the concentration of the copolymer is below the CMC.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo simulation of phase separation of A/B/A-B ternary mixtures

Liang¹,

Jiang

et al. 1999

Macromol. Theory Simul.

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SUMMARY: Monte Carlo simulations were used to model A/B/A-B ternary mixtures with different AB diblock copolymer volume fractions for which both the dispersed and continuous phase volume fractions were kept constant. For concentrations of the diblock copolymer below a critical value, the domain size increment of the dispersed phase decreases linearly with the copolymer concentration. This is in agreement with the predictions of Noolandi and Hong. The dependence of the domain size as a function of the copolymer volume fraction can also be fitted by the equation of Tang and Huang. Our simulations indicate, for the first time, that the micelles form before saturation of the interface occurs. This means that the formation of the micelles is not a result of the saturation of the interface.

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Interfacial behaviour of compatibilizers in polymer blends

Cited by 117 publications

References 12 publications

Poly(styrene‐graft‐ethylene oxide) as a compatibilizer in polystyrene/polyamide blends

Poly(styrene‐graft‐ethylene oxide) as a compatibilizer in polystyrene/polyamide blends

Study of Mechanical Properties and Morphology of PA 6/PO Blends Compatibilized by PO Grafted with Itaconic Acid

Monte Carlo simulation of phase separation of A/B/A-B ternary mixtures

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