Multicompartment microparticles of SBM triblock terpolymers: Morphological transitions through homopolymer blending

IF 2.2 4区 化学 Q3 CHEMISTRY, PHYSICAL Colloid and Polymer Science Pub Date : 2024-09-17 DOI:10.1007/s00396-024-05320-4
Manuel Trömer, Arash Nikoubashman, André H. Gröschel
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Abstract

Block copolymers (BCPs) have recently been explored in spherical confinement to form internally structured microparticles. While the behavior of AB diblock copolymers in confinement is comparably well studied, knowledge on confined ABC triblock terpolymers is still rather sparse. The latter are especially interesting as the third block allows the formation of a broader variety of multicompartment microparticles (MMs), but their synthesis is often realized through sequential polymerization, which can be work intensive and challenging. Here, we demonstrate that blending linear ABC triblock terpolymers with homopolymers is a versatile and straightforward method to tune the microphase behavior in MMs. We systematically blend polystyrene-block-polybutadiene-block-poly(methyl methacrylate) (SBM or PS-b-PB-b-PM) with homopolymers of hPS, hPB, or hPM, to study the feasibility of this approach to replicate specific morphologies or access new ones. We utilize Shirasu Porous Glass (SPG) membrane emulsification and evaporation-induced confinement assembly (EICA) to produce narrowly size-dispersed MMs with defined inner structure. We analyze the MMs with dynamic light scattering (DLS), as well as transmission and scanning electron microscopy (TEM, SEM). We show that the resulting blend morphologies can be identical to those of the unblended SBM at same composition and that, depending on the location in the ternary microphase diagram, one SBM morphology can be converted into multiple different morphologies.

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SBM 三嵌段三元共聚物的多室微颗粒:通过均聚物混合实现形态转变
最近,人们对嵌段共聚物(BCPs)在球形封闭条件下形成内部结构微粒进行了探索。虽然对 AB 二嵌段共聚物在封闭条件下的行为进行了相当深入的研究,但对封闭的 ABC 三嵌段三元共聚物的了解仍然相当稀少。三嵌段三元共聚物尤其有趣,因为第三嵌段可以形成更多种类的多室微颗粒(MMs),但它们的合成通常要通过连续聚合来实现,工作强度大且具有挑战性。在这里,我们证明了将线性 ABC 三嵌段三元共聚物与均聚物混合是调整 MMs 微相行为的一种通用而直接的方法。我们系统地将聚苯乙烯-嵌段-聚丁二烯-嵌段-聚甲基丙烯酸甲酯(SBM 或 PS-b-PB-b-PM)与 hPS、hPB 或 hPM 的均聚物混合,研究这种方法复制特定形态或获得新形态的可行性。我们利用Shirasu多孔玻璃(SPG)膜乳化和蒸发诱导约束组装(EICA)来生产具有确定内部结构的窄粒径分散 MMs。我们利用动态光散射(DLS)以及透射和扫描电子显微镜(TEM、SEM)对 MMs 进行了分析。我们的研究表明,在相同成分下,所产生的共混物形态可能与未共混的 SBM 形态相同,而且根据在三元微相图中的位置,一种 SBM 形态可以转换成多种不同的形态。
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来源期刊
Colloid and Polymer Science
Colloid and Polymer Science 化学-高分子科学
CiteScore
4.60
自引率
4.20%
发文量
111
审稿时长
2.2 months
期刊介绍: Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.
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