Morphology of Blends with Cross-Linked PMMA Microgels and Linear PMMA Chains
Morphology of Blends with Cross-Linked PMMA Microgels and Linear PMMA Chains
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DOI：
10.1021/ma401889k
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发表时间：
2013-11
期刊：
影响因子：
5.5
通讯作者：
M. Schneider;Rolf Michels;V. Pipich;G. Goerigk;V. Sauer;H. Heim;K. Huber
中科院分区：
文献类型：
--
作者：
M. Schneider;Rolf Michels;V. Pipich;G. Goerigk;V. Sauer;H. Heim;K. Huber
本工作研究PMMA胶体在聚合物基体的线性链作为一个简单的和合适的系统复杂的纳米复合材料。该调查是基于SANS实验，这是通过使用氘胶体浸没在矩阵的线性氢化链。通过无表面活性剂的乳液聚合方法合成了具有两种不同尺寸（70和140 nm）的交联的氘代PMMA-胶体，并且通过在每个尺寸分别改变加入的交联剂的量（1.5和15.0 mol-%）来调节溶胀行为。从胶体聚合物溶液制备胶体聚合物共混物。对这些共混物的SANS实验一致地显示，具有低交联密度的胶体可以均匀地分布在整个线性链的基质中。与模型形状因子的拟合表明这些分子分散的微凝胶的模糊球的结构，其相对于它们的大小和形状在水中稍微溶胀。相反...
The present work investigates PMMA colloids in a polymer matrix of linear chains as a simple and suitable system for complex nanocomposites. The investigation was based on SANS experiments, which were enabled by the use of deuterated colloids immersed in a matrix of linear hydrogenated chains. Cross-linked deuterated PMMA-colloids were synthesized with two different sizes (70 and 140 nm) by means of the surfactant-free emulsion polymerization method and the swelling behavior adjusted by varying the amount of added cross-linker (1.5 and 15.0 mol-%) at each size respectively. Colloid–polymer blends were prepared from colloid–polymer solutions. SANS experiments on these blends consistently revealed that colloids with a low cross-linking density could be homogeneously distributed throughout the matrix of linear chains. Fits with model form factors indicated the structure of fuzzy spheres for these molecularly dispersed microgels, which are slightly swollen with respect to their size and shape in H2O. Contrary...