Grafting of poly(dimethylsiloxane) onto poly(styrene-block-Isobutylene-block-styrene)

POLY 405

Tomoya Higashihara, tomoya_higashihara@uml.edu1, Umaprasana Ojha2, Rudolf Faust, Rudolf_Faust@uml.edu1, and Fred Strickler, stricklf@bsci.com3. (1) Department of Chemistry, University of Massachusetts Lowell, One University Avenue, Lowell, MA 01854, (2) Polymer Science Program, Department of Chemistry, University of Massachusetts Lowell, One University Ave., Lowell, MA 01854, (3) Corporate Research & Advanced Technology Development, Boston Scientific Corp, One Boston Scientific Place, Natick, MA 01760
Poly(dimethylsiloxane) (PDMS) segments have been grafted onto poly(styrene-b-isobutylene-b-styrene) (SIBS) by a successive functionalization method involving chloromethylation of SIBS, allylation of chloromethylated SIBS, and hydrosilation with silyl hydride mono-functional PDMS. This reaction scheme afforded a well-defined three-component SIBS-g-PDMS with designed molecular weight (Mn = 215,000 g/mol, PDI = 1.33) and composition (PIB/PS/PDMS = 56.7/21.7/21.6 (wt%) and S/PDMS grafted S = 90.5/9.5 (mole%)). Differential scanning calorimetry of SIBS-g-PDMS showed two glass transition temperatures one at -68 °C corresponding to PIB domains and another one at 42 °C attributed to the miscible domains of PS grafted with PDMS.

 

Synthetic and Biological Macromolecules for Emerging Nanotechnologies
6:00 PM-8:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Polymer Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007