Compatibilizing Effect of Transesterification Copolymers on Bisphenol-A Polycarbonate/Poly(ethylene terephthalate) Blends

Zhang, Guo Ying; Wen, Jing; Cui, Bian Xiao; Luo, Xiao; Zhu, De

doi:10.1002/1521-3935(20010301)202:5<604::aid-macp604>3.0.co;2-g

Cited by 29 publications

(17 citation statements)

References 14 publications

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“…On the other hand, when the catalyst based systems were used, there is a shift to higher temperature for the T g 0 s of PET phases and to lower temperature for the T g 0 s of PC phases compared with neat polymers. This variation of T g temperature could be a consequence of the interchange reaction that occurred between the different phases of the blend during melt blending process and so partial miscible blends were obtained [17].…”

Section: Sem Analysismentioning

confidence: 99%

“…Many articles investigated transesterification reactions occurring in PET/PC blends by using a transesterification catalyst to facilitate the process of reaction in PET/PC blends rich in PET [15][16][17]. Titanium tetrabutoxide and lead acetate hydrate were found to be the most active catalysts [10,11,[15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…Titanium tetrabutoxide and lead acetate hydrate were found to be the most active catalysts [10,11,[15][16][17][18]. Recently lanthanum acetyl acetonate hydrate and cobalt acetyl acetonate were used in PET/PC blending [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Effects of composition and transesterification catalysts on the physico-chemical and dynamic properties of PC/PET blends rich in PC

Al-Jabareen¹,

Illescas

Maspoch

et al. 2010

J Mater Sci

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Melt blending of polycarbonate (PC)/poly (ethylene terephthalate) (PET) rich in PC at absence/present of different type of tranesterification catalysts was carried out by using reactive extrusion method. The thermal, dynamic, and morphological properties were studied. It was found that all blends are formed by a PC matrix and a semicrystalline (12-20% of crystallinity) of PET dispersed phase. The addition of a catalyst in the mixing process promotes a refined and homogeneous dispersion of PET, as well as it enhances the dynamicmechanical behavior of PC/PET blends compared with PC. These effects are attributed to the emulsifying effect of the PC-PET copolymer generated by transesterification. Additionally, this copolymer contributes to the miscibility between phases as demonstrated by the glass transition (T g ) shift of PC phase and PET phase.

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Section: Sem Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of composition and transesterification catalysts on the physico-chemical and dynamic properties of PC/PET blends rich in PC

Al-Jabareen¹,

Illescas

Maspoch

et al. 2010

J Mater Sci

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“…in terms of miscibility and crystallization behavior, [20][21][22][23][24][25][26] focusing on their most important properties for the applicative purposes. For example, the efficiency of the catalysts versus the transesterification reactions, and thus the miscibility and the thermal transitions, has been largely studied.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the efficiency of the catalysts versus the transesterification reactions, and thus the miscibility and the thermal transitions, has been largely studied. [20][21][22][23][24][25][26] However there are few papers which analyze in depth the importance of block size on phase behavior.…”

Section: Introductionmentioning

confidence: 99%

Crystallization of Poly(ethylene terephthalate) in Poly(ethylene terephthalate)/Bisphenol A Polycarbonate Block Copolymers: Influence of Block Length and Role of the Rubbery Amorphous Component

Celli

Marchese

2004

Macro Chemistry & Physics

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Summary: Analysis was made of the crystallization of the PET blocks in PET/PC copolymers as a function of the block length, varying from $\overline M _{\rm n}$ = 5300 to 17100 g · mol−1 (Xn PET = 28–89, PET monomeric sequences). Analysis was also made of a series of PET homopolymers with the same $\overline M _{\rm n}$ values. The copolymers were found to crystallize at a slower rate, with lower crystallinity and lower crystal perfection, than the homopolymers and secondary crystallization does not take place, unlike with PET homopolymers. However the crystallization mechanism is the same. The plot of the crystallization rate versus Xn PET shows that the homopolymers have a maximum crystallization rate at Xn PET ≅ 50 ($\overline M _{\rm n}$ ≅ 10000 g · mol−1), whereas the crystallization rate for copolymers continuously increases with the increment of Xn PET (see Figure). The decrement of the crystallization rate for homopolymers with $\overline M _{\rm n}$ higher than 10000 g · mol−1 has been interpreted as due to the effect of the high melt viscosity. For copolymers with long PET blocks, instead, a phase separation is likely and improves the PET reptation and fold, causing an increment in crystallization rate. Block size and miscibility between the components are therefore the key parameters in understanding the crystallization process in PET/PC block copolymers.

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Low temperature solid‐state extrusion of recycled poly(ethylene terephthalate) bottle scraps

Guo

Tang

Yin

et al. 2006

J of Applied Polymer Sci

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The processing of poly(ethylene terephthalate) (PET) involves thermal and hydrolytic degradation of the polymer chain, which reduces not only the intrinsic viscosity and molecular weight, but also the mechanical properties of recycled materials. A novel PET/bisphenol A polycarbonate/styrene-ethylene-butylene-styrene alloy based on recycled PET scraps is prepared by low temperature solid-state extrusion. Hydrolysis and thermal degradation of PET can be greatly reduced by low temperature solid-state extrusion because the extrusion temperature is between the glass-transition temperature and cold-crystallization temperature of PET. Modification of recycled PET by low temperature solid-state extrusion is an interesting method; it not only provides an easy method to recycle PET scraps by blend processing, but it can also form novel structures such as orientation, crystallization, and networks in the alloy.

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Compatibilizing Effect of Transesterification Copolymers on Bisphenol-A Polycarbonate/Poly(ethylene terephthalate) Blends

Cited by 29 publications

References 14 publications

Effects of composition and transesterification catalysts on the physico-chemical and dynamic properties of PC/PET blends rich in PC

Effects of composition and transesterification catalysts on the physico-chemical and dynamic properties of PC/PET blends rich in PC

Crystallization of Poly(ethylene terephthalate) in Poly(ethylene terephthalate)/Bisphenol A Polycarbonate Block Copolymers: Influence of Block Length and Role of the Rubbery Amorphous Component

Low temperature solid‐state extrusion of recycled poly(ethylene terephthalate) bottle scraps

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