Poly(ethylene glycol)-poly(tetrahydrofuran)-poly(ethylene glycol) triblock copolymer : Synthesis, crystallization behavior and novel morphology
Poly(ethylene glycol)-poly(tetrahydrofuran)-poly(ethylene glycol) (PEG-PTHF-PEG) triblock copolymer was synthesized by ring-opening polymerization of ethylene oxide using sodium alcoholate of PTHF as the macroinitiator. Its crystallization behavior and formation mechanisms of different crystal struc...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Budapest University of Technology
2013-05-01
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| Series: | eXPRESS Polymer Letters |
| Subjects: | |
| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0004206&mi=cd |
| _version_ | 1818661834386833408 |
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| author | X. Q. Liao W. Tian W. B. Zhang X. D. Fan W. W. Fan C. G. Mu J. Kong |
| author_facet | X. Q. Liao W. Tian W. B. Zhang X. D. Fan W. W. Fan C. G. Mu J. Kong |
| author_sort | X. Q. Liao |
| collection | DOAJ |
| description | Poly(ethylene glycol)-poly(tetrahydrofuran)-poly(ethylene glycol) (PEG-PTHF-PEG) triblock copolymer was synthesized by ring-opening polymerization of ethylene oxide using sodium alcoholate of PTHF as the macroinitiator. Its crystallization behavior and formation mechanisms of different crystal structures were studied. The study showed that the molecular weight of PEG-PTHF-PEG exhibited a significant effect on its crystallization: that is, with the increase of the copolymer’s molecular weight, the crystallizability of PTHF blocks decreased gradually, which led to the transition of copolymer from crystalline-crystalline to crystalline-amorphous. By adjusting the total molecular weight of triblock copolymer, the crystallization process can be effectively controlled, and as a result, different spherulite structures were obtained. Particularly, when PTHF blocks became amorphous, novel double concentric spherulites were observed. The morphological structures were studied by differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), polarized optical microscopy (POM), and its crystalline process was investigated. |
| first_indexed | 2024-12-17T04:51:21Z |
| format | Article |
| id | doaj.art-f836c3c25327452ea3407f50891638d7 |
| institution | Directory Open Access Journal |
| issn | 1788-618X |
| language | English |
| last_indexed | 2024-12-17T04:51:21Z |
| publishDate | 2013-05-01 |
| publisher | Budapest University of Technology |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj.art-f836c3c25327452ea3407f50891638d72022-12-21T22:02:54ZengBudapest University of TechnologyeXPRESS Polymer Letters1788-618X2013-05-017541643010.3144/expresspolymlett.2013.39Poly(ethylene glycol)-poly(tetrahydrofuran)-poly(ethylene glycol) triblock copolymer : Synthesis, crystallization behavior and novel morphologyX. Q. LiaoW. TianW. B. ZhangX. D. FanW. W. FanC. G. MuJ. KongPoly(ethylene glycol)-poly(tetrahydrofuran)-poly(ethylene glycol) (PEG-PTHF-PEG) triblock copolymer was synthesized by ring-opening polymerization of ethylene oxide using sodium alcoholate of PTHF as the macroinitiator. Its crystallization behavior and formation mechanisms of different crystal structures were studied. The study showed that the molecular weight of PEG-PTHF-PEG exhibited a significant effect on its crystallization: that is, with the increase of the copolymer’s molecular weight, the crystallizability of PTHF blocks decreased gradually, which led to the transition of copolymer from crystalline-crystalline to crystalline-amorphous. By adjusting the total molecular weight of triblock copolymer, the crystallization process can be effectively controlled, and as a result, different spherulite structures were obtained. Particularly, when PTHF blocks became amorphous, novel double concentric spherulites were observed. The morphological structures were studied by differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), polarized optical microscopy (POM), and its crystalline process was investigated.http://www.expresspolymlett.com/letolt.php?file=EPL-0004206&mi=cdPolymer synthesis, molecular ecrystallizationdouble concentric spherulites |
| spellingShingle | X. Q. Liao W. Tian W. B. Zhang X. D. Fan W. W. Fan C. G. Mu J. Kong Poly(ethylene glycol)-poly(tetrahydrofuran)-poly(ethylene glycol) triblock copolymer : Synthesis, crystallization behavior and novel morphology eXPRESS Polymer Letters Polymer synthesis, molecular e crystallization double concentric spherulites |
| title | Poly(ethylene glycol)-poly(tetrahydrofuran)-poly(ethylene glycol) triblock copolymer : Synthesis, crystallization behavior and novel morphology |
| title_full | Poly(ethylene glycol)-poly(tetrahydrofuran)-poly(ethylene glycol) triblock copolymer : Synthesis, crystallization behavior and novel morphology |
| title_fullStr | Poly(ethylene glycol)-poly(tetrahydrofuran)-poly(ethylene glycol) triblock copolymer : Synthesis, crystallization behavior and novel morphology |
| title_full_unstemmed | Poly(ethylene glycol)-poly(tetrahydrofuran)-poly(ethylene glycol) triblock copolymer : Synthesis, crystallization behavior and novel morphology |
| title_short | Poly(ethylene glycol)-poly(tetrahydrofuran)-poly(ethylene glycol) triblock copolymer : Synthesis, crystallization behavior and novel morphology |
| title_sort | poly ethylene glycol poly tetrahydrofuran poly ethylene glycol triblock copolymer synthesis crystallization behavior and novel morphology |
| topic | Polymer synthesis, molecular e crystallization double concentric spherulites |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0004206&mi=cd |
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