Secondary Relaxations in a Miscible Polymer System: Poly(hydroxy ether of Bisphenol A)/Poly(.epsilon.-caprolactone) Blends

1994 ◽  
Vol 27 (23) ◽  
pp. 6980-6984 ◽  
Author(s):  
R. de Juana ◽  
R. Hernandez ◽  
J. J. Pena ◽  
A. Santamaria ◽  
M. Cortazar
Keyword(s):  
Bisphenol A ◽  
Polymer System ◽  
Secondary Relaxations ◽  
Hydroxy Ether

scholarly journals Chemical Interaction-Induced Evolution of Phase Compatibilization in Blends of Poly(hydroxy ether of bisphenol-A)/Poly(1,4-butylene terephthalate)

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1667
Author(s):  
Jing Liu ◽  
Hsiang-Ching Wang ◽  
Chean-Cheng Su ◽  
Cheng-Fu Yang
Keyword(s):  
Bisphenol A ◽  
Chemical Interaction ◽  
Chemical Exchange ◽  
Hydroxyl Group ◽  
Random Copolymers ◽  
Exchange Reactions ◽  
Butylene Terephthalate ◽  
Alcoholysis Reaction ◽  
Immiscible Blend ◽  
Hydroxy Ether

An immiscible blend of poly(hydroxy ether of bisphenol-A) (phenoxy) and poly(1,4-butylene terephthalate) (PBT) with phase separation was observed in as-blended samples. The compatibilization of phenoxy/PBT blends can be promoted through chemical exchange reactions of phenoxy with PBT upon annealing. The annealed phenoxy/PBT blends had a homogeneous phase with a single Tg that could be enhanced by annealing at 260 °C. Infrared (IR) spectroscopy demonstrated that phase homogenization could be promoted by annealing the phenoxy/PBT blend, where alcoholytic exchange occurred between the dangling hydroxyl group (–OH) in phenoxy and the carbonyl group (C=O) in PBT in the heated blends. The alcoholysis reaction changed the aromatic linkages to aliphatic linkages in the carbonyl groups, which initially led to the formation of a graft copolymer of phenoxy and PBT with an aliphatic/aliphatic carbonyl link. The progressive alcoholysis reaction resulted in the transformation of the initial homopolymers into block copolymers and finally into random copolymers, which promoted phase compatibilization in blends of phenoxy with PBT. As the amount of copolymers increased upon annealing, the crystallization of PBT was inhibited by alcoholytic exchange in the blends.

Influence of Chain Structure on Phase Behavior and Thermal Degradation of Poly(trimethylene terephthalate)/Poly(hydroxy ether) of Bisphenol-A Blends

2007 ◽  
Vol 292 (10–11) ◽  
pp. 1103-1110 ◽  
Author(s):  
Madjid Farmahini-Farahani ◽  
Seyed Hassan Jafari ◽  
Hossein Ali Khonakdar ◽  
Ahmad Yavari ◽  
Raheleh Bakhshi ◽  
...  
Keyword(s):  
Thermal Degradation ◽  
Bisphenol A ◽  
Phase Behavior ◽  
Chain Structure ◽  
Trimethylene Terephthalate ◽  
Hydroxy Ether

Chemical Exchange Reactions in Blends of the Biodegradable Polyester with poly(hydroxy ether of bisphenol-A)

2014 ◽  
Vol 953-954 ◽  
pp. 1246-1249 ◽  
Author(s):  
Chean Cheng Su ◽  
Chern Hwa Chen ◽  
Neng Lang Shih ◽  
Yin Shuo Li
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Differential Scanning Calorimetry ◽  
Bisphenol A ◽  
Chemical Exchange ◽  
Exchange Reactions ◽  
Scanning Calorimetry ◽  
Butylene Succinate ◽  
Butylene Terephthalate ◽  
Before And After ◽  
Hydroxy Ether

Compatibilization via transreactions in blends of poly (butylene succinate-co-butylene terephthalate) [P(BS-co-BT)] with poly (hydroxy ether of bisphenol-A) (phenoxy) were investigated. Analyses were based on characterization using differential scanning calorimetry (DSC) and solid-state nuclear magnetic resonance (NMR). They revealed that the P(BS-co-BT)/phenoxy blend had a phase morphology that could be homogenized only following annealing at high temperatures. As-blended P(BS-co-BT)/phenoxy (50/50 composition) exhibited immiscible phases with two distinct Tgs, but the initially phase separated blends finally merged to form a homogeneous phase with a single Tgupon heating and annealing for 60 min at 280 °C. Chemical exchange reactions upon heat-annealing were likely to have caused the phase homogenization in the P(BS-co-BT)/phenoxy blend. NMR was performed on blend samples before and after they were heated to 280 °C, but the similarity of bonds made obtaining straight results difficult. Results of this study demonstrate phase homogenization can be brought only upon heat-annealing in the P(BS-co-BT)/phenoxy blend.

Miscibility of Poly(arylene phosphine oxide) Systems and Bisphenol A Poly(hydroxy ether)

2001 ◽  
Vol 34 (23) ◽  
pp. 8051-8063 ◽  
Author(s):  
Sheng Wang ◽  
Hong Zhuang ◽  
H. K. Shobha ◽  
T. E. Glass ◽  
M. Sankarapandian ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Phosphine Oxide ◽  
Oxide Systems ◽  
Hydroxy Ether

Miscibility, Intermolecular Interactions, and Thermal Behavior of Poly(hydroxy ether of Bisphenol A)/Poly(ethyl oxazoline) Blends

1998 ◽  
Vol 31 (21) ◽  
pp. 7291-7297 ◽  
Author(s):  
Cheryl Lau ◽  
Sixun Zheng ◽  
Zhikai Zhong ◽  
Yongli Mi
Keyword(s):  
Bisphenol A ◽  
Thermal Behavior ◽  
Intermolecular Interactions ◽  
Hydroxy Ether
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