Umehluko we-viscosity we-PDMS (i-polydimethylsiloxane, eyaziwa nangokuthi uwoyela we-dimethyl abicah) ubangelwa ikakhulukazi izinga le-polymerization, futhi liphinde lithinteke kancane isakhiwo samangqamuzana (njengohlobo lwamaqembu okuphela). Okulandelayo yincazelo enemininingwane ngombono wesakhiwo samakhemikhali:
Izinga le-polymerization liyisici esiyinhloko esinquma i-viscosity ye-PDMS.
Isakhiwo samangqamuzana e-PDMS siwuchungechunge lomugqa-njengokufana, neyunithi ephindayo ethi -Si(CH₃)₂-O-, futhi ifomula yayo evamile ingavezwa ngokuthi: (CH₃)₃SiO{4}}[Si(CH₃)₂ {{5}{7}}{6} {6} {} (CH₃)₃ lapho u-n eyizinga le-polymerization (inani lamayunithi aphindayo).
Izinga eliphakeme le-polymerization (elikhudlwana i-n) : uma iketango lamangqamuzana lide, amandla e-van der Waals aqina (ikakhulukazi amandla okuhlakazeka) phakathi kwama-molecule, futhi ayanda izinga lokubopha phakathi kwamaketanga, okuholela ekungabini kwamanzi kanye ne-viscosity enkulu. I-degree ye-polymerization ephansi (incane i-n), i-molecule ye-molecular iba mfushane, amandla e-intermolecular aba buthaka, i-entanglement encane, i-fluidity engcono, kanye ne-viscosity ephansi.
Isibonelo, idigri ye-polymerization ye-low-viscosity PDMS (efana no-100 mm²/s) ngokuvamile iphansi ngokuqhathaniswa (n cishe amashumi ambalwa). Idigri ye-polymerization ye-PDMS-ye-viscosity ephezulu (efana no-100,000 mm²/s) ingaba phezulu njengamakhulu noma izinkulungwane.