Synthesis and Mechanical Properties of Linear and Long-Chain Branched Homopolymer Topologies via Modular Ligation

通过模块化连接的线性和长链支化均聚物拓扑的合成和机械性能

• 批准号: 216692037
• 负责人: Professor Dr. Christopher Barner-Kowollik
• 金额: --
• 依托单位: Institut für Technische Chemie und Polymerchemie (ITCP)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/216692037?language=en
• 关键词: Synthesis; Mechanical; Properties; Linear; Long

The current extension request builds on the work of the past 3 years funded by the DFG on the topic of "Verarbeitungseigenschaften und Stabilität von RAFT-basierten und modular synthetisierten Polymeren variabler Topologie". Within the requested extension, we wish to exploit our established expertise to achieve two well-defined and clear subsequent aims: (i) Establish the thermomechanical behavior of a new class of modular ligation points that are generated via rapid and efficient photochemical reactions (photo induced click chemistry), yet whose stability under processing conditions has never been assessed. Having access to stability data of such connectivities (here pyrozolines and benzoisoindolediones), which are employed to construct, for example, block copolymers, is of critical importance for their applicability in materials that will undergo processing. In addition, these photochemically generated ligation points are often employed to pattern surfaces and stability information obtained in bulk can be transferred to surfaces, too, on which it is near impossible to obtain directly. (ii) Based on our knowledge obtained in the previous grant regarding the stability and processing conditions we will utilize the different well-defined topologies synthesized in this project as model systems to investigate the mechanical behavior of complex macromolecular architectures with an increasing number of branching points. The rheological characterization will be conducted under oscillatory shear in the linear and non-linear regime (LAOS) and under uniaxial elongation, accompanied by constitutive simulations (MSF and pom-pom) and mimicking of processing conditions using small scale extruders (5 g capacity). To achieve the above aims, we forge a coherent consortium with complementary expertise in precision polymer chemistry (Prof. Barner-Kowollik) for the synthesis of the polymeric materials and expertise in rheological characterization (Prof. Wilhelm).

当前的延期请求建立在 DFG 过去 3 年资助的主题为“RAFT 基础和模块化合成聚合物变量拓扑”主题的工作的基础上，我们希望利用我们既定的专业知识来实现​​这一目标。实现两个明确且明确的后续目标：（i）建立所生成的新型模块化结扎点的热机械行为通过快速有效的光化学反应（光诱导点击化学），但其在加工条件下的稳定性从未被评估过用于构建嵌段共聚物等连接性（此处为吡唑啉和苯并异吲哚二酮）的稳定性数据。 ，对于它们在将要进行加工的材料中的适用性至关重要。此外，这些光化学生成的连接点通常用于图案化表面，并且批量获得的稳定性信息也可以转移到表面。 （ii）根据我们在之前的资助中获得的有关稳定性和加工条件的知识，我们将利用本项目中合成的不同明确的拓扑作为模型系统来研究复杂大分子的机械行为。具有越来越多支化点的结构将在线性和非线性状态 (LAOS) 的振荡剪切下以及单轴伸长下进行流变表征，并进行本构模拟（MSF 和 MSF）。 pom-pom）并使用小型挤出机（5克容量）模拟加工条件为了实现上述目标，我们建立了一个具有精密聚合物化学（Barner-Kowollik教授）互补专业知识的团结联盟，用于合成聚合物。流变表征方面的材料和专业知识（Wilhelm 教授）。

项目成果

Comb Polymers with Triazole Linkages under Thermal and Mechanical Stress

热应力和机械应力下具有三唑键的梳状聚合物

• DOI: 10.1021/acs.macromol.8b02174
• 发表时间: 2019
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: Abbasi;Fischer;Wilhelm;Goldmann;Barner-Kowollik
• 通讯作者: Barner-Kowollik

Comb and Bottlebrush Polymers with Superior Rheological and Mechanical Properties

• DOI: 10.1002/adma.201806484
• 发表时间: 2019-06-01
• 期刊: ADVANCED MATERIALS
• 影响因子: 29.4
• 作者: Abbasi, Mahdi;Faust, Lorenz;Wilhelm, Manfred
• 通讯作者: Wilhelm, Manfred

Molecular origin of the foam structure in model linear and comb polystyrenes: I. Cell density

• DOI: 10.1016/j.polymer.2020.122351
• 发表时间: 2020-04
• 期刊: Polymer
• 影响因子: 4.6
• 作者: M. Abbasi;Lorenz Faust;M. Wilhelm

Molecular origin of the foam structure in model linear and comb polystyrenes: II. Volume expansion ratio

• DOI: 10.1016/j.polymer.2020.122354
• 发表时间: 2020-04
• 期刊: Polymer
• 影响因子: 4.6
• 作者: M. Abbasi;Lorenz Faust;M. Wilhelm

Stability of Diels-Alder photoadducts in macromolecules

• DOI: 10.1039/c8py00748a
• 发表时间: 2018-07
• 期刊: Polymer Chemistry
• 影响因子: 4.6
• 作者: C. Petit;Lukas D Bangert;M. Abbasi;M. Wilhelm;Anja S. Goldmann;C. Barner‐Kowollik