Investigations on “near perfect” poly(2-oxazoline) based amphiphilic polymer conetworks with a crystallizable block
Investigations on “near perfect” poly(2-oxazoline) based amphiphilic polymer conetworks with a crystallizable block
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对具有可结晶嵌段的“近乎完美”聚（2-恶唑啉）基两亲聚合物共网络的研究
DOI：
10.1016/j.eurpolymj.2016.09.046
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发表时间：
2016
影响因子：
6
通讯作者：
J. C. Tiller
中科院分区：
文献类型：
--
作者：
M. Schmidt;T. Raidt;S. Ring;S. Gielke;C. Gramse;S. Wilhelm;F. Katzenberg;C. Krumm;J. C. Tiller
通过交联特定的聚恶唑啉嵌段共聚物，制备了具有“近乎完美”结构的两亲性聚合物网络（APCN）。为此，制备并交联了以聚（2-甲基恶唑啉）（PMOx）为A嵌段、以聚（2-庚基恶唑啉）（PHepOx）为B嵌段的阿坝三嵌段共聚物。用原子力显微镜（AFM）、小角X射线散射（SAXS）和广角X射线散射（WAXS）对所得两亲性聚合物网络进行了表征。结果表明，如果含量大于19体积%，则PHepOx嵌段在APCN中结晶，但如果聚合物含量低于68体积%，则在差示扫描量热法中没有显示热特征。此外，聚合物相的尺寸在38-58体积%的组成范围内是相同的。PHepOx。通过AFM证实了相尺寸。在广泛的组合物中发现的非常规则的互连结构似乎是APCN中的通用结构动机，并且在插入可结晶聚合物嵌段时也形成。
Amphiphilic polymer conetworks (APCNs) of “near perfect” structure were prepared by cross-linking defined poly(2-oxazoline)-based block copolymers. To this end, ABA triblock copolymers with poly(2-methyloxazoline) (PMOx) as A block and poly(2-heptyloxazoline) (PHepOx) as B block in different compositions and with different cross-linkable end groups were prepared and crosslinked. The resulting amphiphilic polymer conetworks were characterized with atomic force microscopy (AFM) and small as well as wide angle X-ray scattering (SAXS/WAXS). The results show that the PHepOx block crystallizes in the APCNs if the content is larger than 19 vol.%, but shows no thermal signature in the differential scanning calorimetry if the polymer content is below 68 vol.%. Further, the size of the polymer phase is the same in a composition range of 38–58 vol.% PHepOx. The phase size was confirmed by AFM. The found very regular interconnected structure over a wide range of compositions seems to be the generic structural motive in APCNs and is also formed when inserting a crystallizable polymer block.
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DOI：
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发表时间：
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期刊：
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影响因子：
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