Toughening mechanism in a ternary polymer alloy: PBT/PC/rubber system

Okamoto, Masami; Shinoda, Yoshihiro; Kojima, Takayuki; Inoue, Takashi

doi:10.1016/0032-3861(93)90011-x

Cited by 29 publications

(11 citation statements)

References 11 publications

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“…It is well known that the elongation at break of PBT drops seriously with ageing time even at 508C [2]. By contrast, a lot of articles are reported for the toughing by elastomeric modifiers, especially by core-shell rubber modifier, such as MBS (methylmethacrylate-butadiene-styrene terpolymer) and SEBS (hydrogenated styrene-butadiene-styrene block copolymer) [3][4][5][6][7][8]. Several studies described the toughening PBT by reactive blending with maleic anhydride grafted polyolefins and poly(ethylene-co-glycidyl methacrylate) (EGMA) [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Super‐ductile PBT alloy with excellent heat resistance

Hashima

Usui

et al. 2008

Polymer Engineering & Sci

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A super-ductile PBT alloy with excellent heat resistance was successfully fabricated by reactive blending of poly(butylene terephthalate) (PBT) with poly(ethylene-coglycidyl methacrylate) together with linear low density polyethylene (LLDPE) and hydrogenated styrene-butadiene-styrene block copolymer (SEBS). It possesses a unique tensile stress-strain curve with no yielding point and large elongation at break, moreover, the alloy did not show serious deterioration of the mechanical properties by high temperature annealing at 1508C for 96 h. The structure-properties relationship is discussed on the basis of transmission electron microscopy, differential scanning calorimetry, dynamic mechanical analysis, and wide-angle X-ray diffraction analysis. The outstanding ductile nature seems to come from the negative pressure effect of LLDPE (or LLDPE/SEBS) particles that dilates the PBT ligament matrix to enhance the local segment motions.

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Section: Introductionmentioning

confidence: 99%

Super‐ductile PBT alloy with excellent heat resistance

Hashima

Usui

et al. 2008

Polymer Engineering & Sci

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“…[18][19][20] Fortunately, the inherent chemical functionality of PBT makes it an attractive candidate for modification. Some authors Downloaded by [UNSW Library] at 01: 24 17 August 2015 ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 4 have described approaches for improving the toughness of PBT by the reaction of a polymer containing an appropriate chemical functionality with the carboxyl or hydroxyl end groups of PBT during melt processing. [21][22][23][24] In the literature [25][26][27][28][29][30][31] polyolefins and elastomers containing various functionalities, such as maleic anhydride, epoxides, acids, isocyanate, and oxazolines, used to reactively compatibilize PBT have been reported; these reports evaluated the compatibilization efficiency of the different functionalities.…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6][7][8][9][10][11][12][13][14] However, simple blending of PBT with other components usually cannot produce satisfactory properties because of the unfavorable interaction between molecular segments of the components which is responsible for their immiscibility or poor interfacial adhesion. Therefore, reactive compatibilization is very often used to obtain a blend with the desirable properties.…”

Section: Introductionmentioning

confidence: 99%

Poly(butylene terephthalate) Toughening with Butadiene-Epoxy-Functionalized Methyl Methacrylate Core–Shell Copolymer

Hao

Sun

et al. 2015

Journal of Macromolecular Science, Part B

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Butadiene glycidyl methacrylate-functionalized-methyl methacrylate (PB-g-MG) core-shell copolymer was used to toughen poly(butylene terephthalate) (PBT). Fourier transform infrared spectra and torque tests showed that compatibilization reactions took place between the carboxyl and/or hydroxyl groups of PBT and the epoxy groups of PB-g-MG. Phase morphology results showed that the PB-g-MG core-shell particles dispersed in the PBT matrix uniformly. The addition of PB-g-MG significantly improved the mechanical properties of PBT. The elongation at break and the impact strength increased with the increase of PB-g-MG content. SEM resultsshowed that the shear yielding properties of the PBT matrix was the main toughening mechanism.The relationship between complex viscosity and angular frequency of the PBT/PB-g-MG blends indicated that the melt viscosity was higher than that of pure PBT.

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“…However, because of their incompatibility with polymer matrices, CSR fillers tend to aggregate with each other, especially in low‐viscosity matrices. This agglomeration can be minimized by the use of a chemical reaction that directly links the matrix chains around the fillers during blending9–11 or by the loading of a tertiary polymer that is physically compatible with both components 12–14…”

Section: Introductionmentioning

confidence: 99%

Surface modification effects of core–shell rubber particles on the toughening of poly(butylene terephthalate)

Yang

Cho

2010

J of Applied Polymer Sci

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We toughened poly(butylene terephthalate) (PBT) by loading core-shell rubber (CSR) type impact modifiers, consisting of a rubbery poly(n-butyl acrylate) core and a rigid poly(methyl methacrylate) shell. To optimize the dispersion of CSR particles into the PBT matrix during melt compounding, the shell surface was modified with different grafting ratios of glycidyl methacrylate (GMA) reactive with PBT chain ends. In PBT blends with a 20 wt % CSR loading, the dispersed rubbery phases showed discernible shapes depending on the grafted GMA content, from predetermined spheres with 0.25 6 0.05 lm diameters to their aggregates in the 2-3 lm diameter range.As a result, the interparticle spacing (s) could be controlled from 0.25 to 4.0 lm in the PBT blends containing the fixed rubber loading. The Izod impact strengths of these samples increased significantly below s ¼ 0.4 lm. Additional thermal and morphological analyses strongly supported the hypothesis that the marked increase in toughness of the blends was related to less ordered lamellar formation of the PBT matrix under the confined geometry.

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Toughening mechanism in a ternary polymer alloy: PBT/PC/rubber system

Cited by 29 publications

References 11 publications

Super‐ductile PBT alloy with excellent heat resistance

Super‐ductile PBT alloy with excellent heat resistance

Poly(butylene terephthalate) Toughening with Butadiene-Epoxy-Functionalized Methyl Methacrylate Core–Shell Copolymer

Surface modification effects of core–shell rubber particles on the toughening of poly(butylene terephthalate)

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