Structures PDMS-poly diblock

We inferred that the unusual structures of PFS-b-PDMS and PFS-b-PI were due to the crystalline nature of the PFS block [11,12], In order to verify this conclusion, we slightly modified the poly(ferrocenyldimethylsilane) block by replacing one methyl group linked to the silicon by an ethyl group, leading to a non-crystallizable poly(ferrocenylethylmethylsilane) block (PFEMS) [11], We found that PI and PDMS diblock copolymers with the non-crystallizable PFEMS block form only star-like micelles in n-alkane solvents. Moreover, further studies performed on PI copolymerized with polyferrocenylphos-phine (PFP) which cannot crystallize [14] show only the... 

The diblock copolymers synthesized (Table 1) are structurally related to the commercially available poly(oxyethylene-alkyl ether) systems (Brij that are built from PEO blocks and hydrocaibon chains. These systems have been successfidly lied as templates in the synthesis of mesostructured silicate materials [2]. PDMS-PEO-based block copolymers are also known to exhibit a two-phase morphology in a certain set of solvents, which may be ascribed, to a first approximation, to the large difference in the solubility parameters of the PDMS and PEO blocks [5]. 

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