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Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers
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| Zeitschriftentitel: | Journal of Applied Polymer Science |
|---|---|
| Personen und Körperschaften: | , , , |
| In: | Journal of Applied Polymer Science, 93, 2004, 2, S. 870-876 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Wiley
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| Schlagwörter: |
| author_facet |
Xu, Jun‐Ting Xue, Liang Mai, Shao‐Min Ryan, A. J. Xu, Jun‐Ting Xue, Liang Mai, Shao‐Min Ryan, A. J. |
|---|---|
| author |
Xu, Jun‐Ting Xue, Liang Mai, Shao‐Min Ryan, A. J. |
| spellingShingle |
Xu, Jun‐Ting Xue, Liang Mai, Shao‐Min Ryan, A. J. Journal of Applied Polymer Science Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers Materials Chemistry Polymers and Plastics Surfaces, Coatings and Films General Chemistry |
| author_sort |
xu, jun‐ting |
| spelling |
Xu, Jun‐Ting Xue, Liang Mai, Shao‐Min Ryan, A. J. 0021-8995 1097-4628 Wiley Materials Chemistry Polymers and Plastics Surfaces, Coatings and Films General Chemistry http://dx.doi.org/10.1002/app.20490 <jats:title>Abstract</jats:title><jats:p>The nonisothermal crystallization and morphology of three oxyethylene–oxybutylene block copolymers with different architectures (E<jats:sub>50</jats:sub>B<jats:sub>70</jats:sub>, B<jats:sub>65</jats:sub>E<jats:sub>75</jats:sub>B<jats:sub>65</jats:sub>, and E<jats:sub>35</jats:sub>B<jats:sub>114</jats:sub>E<jats:sub>35</jats:sub>) were compared with those of three blends (E<jats:sub>56</jats:sub>B<jats:sub>27</jats:sub>/B<jats:sub>14</jats:sub>, B<jats:sub>37</jats:sub>E<jats:sub>77</jats:sub>B<jats:sub>37</jats:sub>/B<jats:sub>14</jats:sub>, and E<jats:sub>38</jats:sub>B<jats:sub>38</jats:sub>E<jats:sub>38</jats:sub>/B<jats:sub>14</jats:sub>) with the same composition and morphology (E and B represent oxyethylene and oxybutylene units, respectively, and the subscripts denote the degree of polymerization), and the effect of the amorphous block was examined. The neat block copolymers had larger <jats:italic>d</jats:italic>‐spacings and higher melting temperatures than the corresponding blends. In nonisothermal crystallization, the neat block copolymers had lower crystallization temperatures at high cooling rates. The difference in the crystallization temperatures became smaller at low cooling rates, and some of the neat block copolymers could have higher crystallization temperatures. Polarized optical microscopy showed that the neat block copolymers had smaller dimensions of crystal growth and smaller size of spherulites than the blends. The lower crystallization temperatures and less perfect morphology were attributed to the slower rate of conformational rearrangement of the amorphous block, which was required by the chain folding of the crystallizable block. This effect was more evident in the E<jats:sub>35</jats:sub>B<jats:sub>114</jats:sub>E<jats:sub>35</jats:sub> triblock copolymer, in which both ends of the amorphous B block were immobilized at the interface. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 870–876, 2004</jats:p> Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers Journal of Applied Polymer Science |
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| title |
Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| title_unstemmed |
Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| title_full |
Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| title_fullStr |
Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| title_full_unstemmed |
Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| title_short |
Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| title_sort |
effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| topic |
Materials Chemistry Polymers and Plastics Surfaces, Coatings and Films General Chemistry |
| url |
http://dx.doi.org/10.1002/app.20490 |
| publishDate |
2004 |
| physical |
870-876 |
| description |
<jats:title>Abstract</jats:title><jats:p>The nonisothermal crystallization and morphology of three oxyethylene–oxybutylene block copolymers with different architectures (E<jats:sub>50</jats:sub>B<jats:sub>70</jats:sub>, B<jats:sub>65</jats:sub>E<jats:sub>75</jats:sub>B<jats:sub>65</jats:sub>, and E<jats:sub>35</jats:sub>B<jats:sub>114</jats:sub>E<jats:sub>35</jats:sub>) were compared with those of three blends (E<jats:sub>56</jats:sub>B<jats:sub>27</jats:sub>/B<jats:sub>14</jats:sub>, B<jats:sub>37</jats:sub>E<jats:sub>77</jats:sub>B<jats:sub>37</jats:sub>/B<jats:sub>14</jats:sub>, and E<jats:sub>38</jats:sub>B<jats:sub>38</jats:sub>E<jats:sub>38</jats:sub>/B<jats:sub>14</jats:sub>) with the same composition and morphology (E and B represent oxyethylene and oxybutylene units, respectively, and the subscripts denote the degree of polymerization), and the effect of the amorphous block was examined. The neat block copolymers had larger <jats:italic>d</jats:italic>‐spacings and higher melting temperatures than the corresponding blends. In nonisothermal crystallization, the neat block copolymers had lower crystallization temperatures at high cooling rates. The difference in the crystallization temperatures became smaller at low cooling rates, and some of the neat block copolymers could have higher crystallization temperatures. Polarized optical microscopy showed that the neat block copolymers had smaller dimensions of crystal growth and smaller size of spherulites than the blends. The lower crystallization temperatures and less perfect morphology were attributed to the slower rate of conformational rearrangement of the amorphous block, which was required by the chain folding of the crystallizable block. This effect was more evident in the E<jats:sub>35</jats:sub>B<jats:sub>114</jats:sub>E<jats:sub>35</jats:sub> triblock copolymer, in which both ends of the amorphous B block were immobilized at the interface. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 870–876, 2004</jats:p> |
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| author | Xu, Jun‐Ting, Xue, Liang, Mai, Shao‐Min, Ryan, A. J. |
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| description | <jats:title>Abstract</jats:title><jats:p>The nonisothermal crystallization and morphology of three oxyethylene–oxybutylene block copolymers with different architectures (E<jats:sub>50</jats:sub>B<jats:sub>70</jats:sub>, B<jats:sub>65</jats:sub>E<jats:sub>75</jats:sub>B<jats:sub>65</jats:sub>, and E<jats:sub>35</jats:sub>B<jats:sub>114</jats:sub>E<jats:sub>35</jats:sub>) were compared with those of three blends (E<jats:sub>56</jats:sub>B<jats:sub>27</jats:sub>/B<jats:sub>14</jats:sub>, B<jats:sub>37</jats:sub>E<jats:sub>77</jats:sub>B<jats:sub>37</jats:sub>/B<jats:sub>14</jats:sub>, and E<jats:sub>38</jats:sub>B<jats:sub>38</jats:sub>E<jats:sub>38</jats:sub>/B<jats:sub>14</jats:sub>) with the same composition and morphology (E and B represent oxyethylene and oxybutylene units, respectively, and the subscripts denote the degree of polymerization), and the effect of the amorphous block was examined. The neat block copolymers had larger <jats:italic>d</jats:italic>‐spacings and higher melting temperatures than the corresponding blends. In nonisothermal crystallization, the neat block copolymers had lower crystallization temperatures at high cooling rates. The difference in the crystallization temperatures became smaller at low cooling rates, and some of the neat block copolymers could have higher crystallization temperatures. Polarized optical microscopy showed that the neat block copolymers had smaller dimensions of crystal growth and smaller size of spherulites than the blends. The lower crystallization temperatures and less perfect morphology were attributed to the slower rate of conformational rearrangement of the amorphous block, which was required by the chain folding of the crystallizable block. This effect was more evident in the E<jats:sub>35</jats:sub>B<jats:sub>114</jats:sub>E<jats:sub>35</jats:sub> triblock copolymer, in which both ends of the amorphous B block were immobilized at the interface. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 870–876, 2004</jats:p> |
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| imprint | Wiley, 2004 |
| imprint_str_mv | Wiley, 2004 |
| institution | DE-D275, DE-Bn3, DE-Brt1, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229 |
| issn | 0021-8995, 1097-4628 |
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| physical | 870-876 |
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| series | Journal of Applied Polymer Science |
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| spelling | Xu, Jun‐Ting Xue, Liang Mai, Shao‐Min Ryan, A. J. 0021-8995 1097-4628 Wiley Materials Chemistry Polymers and Plastics Surfaces, Coatings and Films General Chemistry http://dx.doi.org/10.1002/app.20490 <jats:title>Abstract</jats:title><jats:p>The nonisothermal crystallization and morphology of three oxyethylene–oxybutylene block copolymers with different architectures (E<jats:sub>50</jats:sub>B<jats:sub>70</jats:sub>, B<jats:sub>65</jats:sub>E<jats:sub>75</jats:sub>B<jats:sub>65</jats:sub>, and E<jats:sub>35</jats:sub>B<jats:sub>114</jats:sub>E<jats:sub>35</jats:sub>) were compared with those of three blends (E<jats:sub>56</jats:sub>B<jats:sub>27</jats:sub>/B<jats:sub>14</jats:sub>, B<jats:sub>37</jats:sub>E<jats:sub>77</jats:sub>B<jats:sub>37</jats:sub>/B<jats:sub>14</jats:sub>, and E<jats:sub>38</jats:sub>B<jats:sub>38</jats:sub>E<jats:sub>38</jats:sub>/B<jats:sub>14</jats:sub>) with the same composition and morphology (E and B represent oxyethylene and oxybutylene units, respectively, and the subscripts denote the degree of polymerization), and the effect of the amorphous block was examined. The neat block copolymers had larger <jats:italic>d</jats:italic>‐spacings and higher melting temperatures than the corresponding blends. In nonisothermal crystallization, the neat block copolymers had lower crystallization temperatures at high cooling rates. The difference in the crystallization temperatures became smaller at low cooling rates, and some of the neat block copolymers could have higher crystallization temperatures. Polarized optical microscopy showed that the neat block copolymers had smaller dimensions of crystal growth and smaller size of spherulites than the blends. The lower crystallization temperatures and less perfect morphology were attributed to the slower rate of conformational rearrangement of the amorphous block, which was required by the chain folding of the crystallizable block. This effect was more evident in the E<jats:sub>35</jats:sub>B<jats:sub>114</jats:sub>E<jats:sub>35</jats:sub> triblock copolymer, in which both ends of the amorphous B block were immobilized at the interface. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 870–876, 2004</jats:p> Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers Journal of Applied Polymer Science |
| spellingShingle | Xu, Jun‐Ting, Xue, Liang, Mai, Shao‐Min, Ryan, A. J., Journal of Applied Polymer Science, Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers, Materials Chemistry, Polymers and Plastics, Surfaces, Coatings and Films, General Chemistry |
| title | Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| title_full | Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| title_fullStr | Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| title_full_unstemmed | Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| title_short | Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| title_sort | effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| title_unstemmed | Effect of the amorphous segment on the nonisothermal crystallization and morphology of oxyethylene–oxybutylene block copolymers |
| topic | Materials Chemistry, Polymers and Plastics, Surfaces, Coatings and Films, General Chemistry |
| url | http://dx.doi.org/10.1002/app.20490 |