Control of the Subinclusion Microstructure in HDPE/PS/PMMA Ternary Blends
Control of the Subinclusion Microstructure in HDPE/PS/PMMA Ternary Blends
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DOI：
10.1021/ma991954g
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发表时间：
2000-08
期刊：
影响因子：
5.5
通讯作者：
J. Reignier;B. Favis
中科院分区：
文献类型：
--
作者：
J. Reignier;B. Favis
用Brabender混炼机一步制备了HDPE、PS和PMMA的各种三元共混物。当HDPE为主要组分时，如在这种情况下，形态由HDPE基质、PS分散相和分散PS中的PMMA亚夹杂物组成，由扩散系数预测。扫描电子显微镜观察和定量表征表明，这种复杂的形态在混合的第一分钟内就出现了，并在此后保持稳定。定量分析表明，所有PMMA均以亚包裹体形式存在。降低PS/−组成比可以控制分散相的内部结构，从分散在较大的PS粒子中的细小的PMMA亚夹杂物到PS/PMMA核的PMMA壳结构。此外，还研究了复合液滴的聚结情况。在退火后，这些体系明显经历了双重聚结过程：复合液滴/复合液滴合并和分散的亚包裹体粒子之间的合并。阿尔特..。
Various ternary blends of HDPE, PS, and PMMA were prepared in one step using a Brabender mixer. When HDPE is the major component, as in this case, the morphology consists of a HDPE matrix, a PS dispersed phase and PMMA subinclusions within the dispersed PS, as predicted by the spreading coefficients. SEM observation and quantitative characterization were used to show that this complex morphology occurs within the first minutes of mixing and remains stable thereafter. Furthermore, it is shown quantitatively that all the PMMA is present in subinclusion form. It is possible to manipulate the dispersed phase internal structure from small PMMA subinclusions dispersed in a larger PS particle to a PS/PMMA core−shell structure upon decreasing the PS/PMMA composition ratio. Coalescence of composite droplets was also investigated. Upon annealing, these systems clearly experience a dual coalescence process: composite droplet/composite droplet coalescence and coalescence between dispersed subinclusion particles. Alt...