% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @ARTICLE{Kyrey:864692, author = {Kyrey, Tetyana and Witte, Judith and Feoktystov, Artem and Pipich, Vitaliy and Wu, Baohu and Pasini, Stefano and Radulescu, Aurel and Witt, Marcus U. and Kruteva, Margarita and von Klitzing, Regine and Wellert, Stefan and Holderer, Olaf}, title = {{I}nner structure and dynamics of microgels with low and medium crosslinker content prepared via surfactant-free precipitation polymerization and continuous monomer feeding approach}, journal = {Soft matter}, volume = {15}, number = {32}, issn = {1744-6848}, address = {London}, publisher = {Royal Soc. of Chemistry}, reportid = {FZJ-2019-04386}, pages = {6536 - 6546}, year = {2019}, abstract = {The preparation of poly(N-isopropylacrylamide) microgels via classical precipitation polymerization (batch method) and a continuous monomer feeding approach (feeding method) leads to different internal crosslinker distributions, i.e., from core–shell-like to a more homogeneous one. The internal structure and dynamics of these microgels with low and medium crosslinker concentrations are studied with dynamic light scattering and small-angle neutron scattering in a wide q-range below and above the volume phase transition temperature. The influence of the preparation method, and crosslinker and initiator concentration on the internal structure of the microgels is investigated. In contrast to the classical conception where polymer microgels possess a core–shell structure with the averaged internal polymer density distribution within the core part, a detailed view of the internal inhomogeneities of the PNIPAM microgels and the presence of internal domains even above the volume phase transition temperature, when polymer microgels are in the deswollen state, are presented. The correlation between initiator concentration and the size of internal domains that appear inside the microgel with temperature increase is demonstrated. Moreover, the influence of internal inhomogeneities on the dynamics of the batch- and feeding-microgels studied with neutron spin-echo spectroscopy is reported.}, cin = {JCNS-FRM-II / JCNS-1 / MLZ}, ddc = {530}, cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-Juel1)JCNS-1-20110106 / I:(DE-588b)4597118-3}, pnm = {6215 - Soft Matter, Health and Life Sciences (POF3-621) / 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)}, pid = {G:(DE-HGF)POF3-6215 / G:(DE-HGF)POF3-6G4}, experiment = {EXP:(DE-MLZ)KWS1-20140101 / EXP:(DE-MLZ)KWS2-20140101 / EXP:(DE-MLZ)KWS3-20140101 / EXP:(DE-MLZ)J-NSE-20140101}, typ = {PUB:(DE-HGF)16}, pubmed = {pmid:31355828}, UT = {WOS:000481424100008}, doi = {10.1039/C9SM01161G}, url = {https://juser.fz-juelich.de/record/864692}, }