Modification of the reactive core-shell particles properties to prepare PBT/PC blends with higher toughness and stiffness

Deng, Bin; Lv, Hanxiao; Song, Shixin; Sun, Shulin; Zhang, Huixuan

doi:10.1007/s10965-017-1250-3

Cited by 10 publications

(6 citation statements)

References 20 publications

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“…The impact strength of the blends (Supplement Table 1) also significantly improved at this stage (303.68–569.95 J/m). Usually, the triaxial tension caused by impact will be obviously relieved under the conditions of internal cavitation of rubber particles and debonding at the particle/matrix interface, which will promote the shear yield of the matrix, leading to ductile behavior. ,− It can be seen from Figure d,e that when the PPE content in the matrix reaches 30 wt % and higher, the varisized rubber particles continue to elongate, and the toughness of the blends also increases with the increase of PPE content.…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties and Deformation Mechanism of Bimodal-Rubber-Particle-Toughened Polyphenylene Ether/Polystyrene Blends

Wang

Ren

et al. 2022

ACS Appl. Polym. Mater.

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A core−shell polybutadiene-graft-polystyrene (PB-g-PS) copolymer with a core−shell ratio of 70/30 (wt/wt) was synthesized by redox-initiated emulsion graft polymerization. Compatible polymers of polyphenylene ether (PPE) and polystyrene (PS) blend were toughened by the addition of high-impact polystyrene (HIPS) and the PB-g-PS copolymer, and the content of PB rubber in the whole matrix was kept at 17.4 wt %. The influence of the matrix composition and synergistic toughening effect of different-sized rubber particles on the mechanical properties, morphology, and deformation mechanism of HIPS/PPE/PS/PBg-PS blends was investigated. The results showed that submicrometer-sized PB-g-PS core−shell particles (318 nm) and large-sized HIPS rubber particles (1∼5 μm) had an excellent synergistic toughening effect, which could significantly improve the toughness of the PPE/PS blends, from 47 to 672 J/m. The impact strength, elongation at break, tensile strength, and degree of stress whitening of the blends increased with the increase of PPE content in the matrix, and when the content of PPE increased from 10 to 20 wt %, the brittle−ductile transition occurred. Transmission electron microscopy and scanning electron microscopy results showed that when the PPE content in the blends was low, the PB-g-PS copolymers would agglomerate and be unevenly distributed in the matrix, and the deformation mechanism of the blend was multiple crazing. With increased PPE content, the distribution of the PB-g-PS copolymers was significantly improved, and the deformation mechanism combined crazing and shear yield. With the further increase of PPE content, the rubber particles in the matrix became extensively elongated, and the deformation mechanism was wholly transformed to shear yield.

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Section: Resultsmentioning

confidence: 99%

Mechanical Properties and Deformation Mechanism of Bimodal-Rubber-Particle-Toughened Polyphenylene Ether/Polystyrene Blends

Wang

Ren

et al. 2022

ACS Appl. Polym. Mater.

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“…It can be found that the crystallization temperature (T c ) of pure PBT is about 199.8 o C. The T c of PBT in the PBT/PC blend decreases to 191.5 o C. The decease of T c for PBT phase in the PBT/PC blends is due to the transesterification reaction between PBT to PC and similar results have been reported in many researches. [29][30][31] In the PBT/PC/c-MWCNT blends, the T c of PBT phase increases obviously compared to the value in the PBT/PC blend and even 0.1% c-MWCNT induces a 14 o C improvement. When the c-MWCNT content is 4% (T c =211.8 o C), the T c is enhanced more than 20 o C. Two reasons can be used to explain the crystallization change of PBT in the nanocomposites.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Properties of PBT/PC Blends with the Addition of Carboxyl-functionalized Multiwalled Carbon Nanotube

Hu¹,

Song²,

Lv³

et al. 2018

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Carboxyl-functionalized multiwalled carbon nanotube (c-MWCNT) was used to enhance the properties of poly(butylene terephthalate)/polycarbonate (PBT/PC) blends by melt blending. The c-MWCNT inhibited transesterification reactions between PBT and PC. SEM result showed that most of the c-MWCNT dispersed in the PBT matrix and partial c-MWCNT lied between the interface of PBT and PC phases. c-MWCNT promoted the crystallization of PBT due to the decreased transesterification and the heterogeneous nucleating effect, which led to a 20 o C increase of the crystallization temperature. DMA test indicated that the miscibility between PBT and PC decreased with the c-MWCNT loading since the inhibited transesterification. When the c-MWCNT content was 4 wt%, the yield strength of 65.9 MPa and tensile modulus of 2116 MPa were achieved, which corresponded to 23.9 and 19.5% increase relative to the pure PBT/ PC blend. The conductivity and dielectric properties of PBT/PC were largely enhanced by the c-MWCNT. The σ d c values of PBT/PC improved greatly by several orders of magnitude from 10-1 8 to 10-7 when the c-MWCNT content was 2 wt%. The dielectric constant at 100 Hz for the nanocomposites increased from 2.8 to 146 when the c-MWCNT loading varied from 0.1 to 4 wt%, which improved more than 50 times.

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“…Unique transesterification chemistry [2,4,5,9,6,12,20,8,11,21,35,52,[60][61][62][63][64][65][66][67][68][69][70] Mechanical and Morphology [1,4,13,21,22,36,48,56,35,68] Chemical resistance [4,5,26,44,45] Rheology and Processing [26, 43-49, 8, 46, 52, 54, 63, 66, 67] Recycling [58] Flame retardant characteristics [69] Impact modification [12,19,21,23,25,55,43,35,[60]…”

Section: Salient Features Of Pc-pbt Blendmentioning

confidence: 99%

Review on transesterification in polycarbonate–poly(butylene terephthalate) blend

Ganguly¹,

Channe

Jha³

et al. 2021

Polymer Engineering & Sci

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Various polycarbonate ‐ poly(butylene terephthalate) polyester (PC‐PBT) blend prepared by reactive melt blending primarily in extruder with range of temperature and time are discussed in this review article. In the melt blended PC‐PBT blend system, transesterification plays a major role in formation of PC‐PBT blend. Transesterification reactions between these two polymers have been analyzed by proper polymer sample, end‐capped or having reactive chain end group. The kinetics of mechanism is a function of temperature and PC‐PBT ratio. Trace catalyst residue present in PBT catalyzes the transesterification reaction. As the extent of transesterification is increased, it forms various composition of copolymer. Inhibition in the transesterification reaction of PC‐PBT blend has been observed when different type of alkyl, aryl, and alkyl‐aryl group of phosphite are introduced into it, otherwise there has been collateral change in the morphology, thermal, and mechanical property of blend. Therefore, this PC‐PBT blend has been an interesting topic of research in academia and industries.

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Modification of the reactive core-shell particles properties to prepare PBT/PC blends with higher toughness and stiffness

Cited by 10 publications

References 20 publications

Mechanical Properties and Deformation Mechanism of Bimodal-Rubber-Particle-Toughened Polyphenylene Ether/Polystyrene Blends

Mechanical Properties and Deformation Mechanism of Bimodal-Rubber-Particle-Toughened Polyphenylene Ether/Polystyrene Blends

Enhanced Properties of PBT/PC Blends with the Addition of Carboxyl-functionalized Multiwalled Carbon Nanotube

Review on transesterification in polycarbonate–poly(butylene terephthalate) blend

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