ʻO ka ʻokoʻa viscosity o PDMS (polydimethylsiloxane, ʻike ʻia hoʻi ʻo dimethyl silicone oil) ke kumu nui ʻia e ke degere o ka polymerization, a ua hoʻopilikia ʻia hoʻi e ka molecular structure (e like me ke ʻano o nā hui hope). ʻO kēia ka wehewehe kikoʻī mai ke kuanaʻike o ke ʻano kemika:
ʻO ke kiʻekiʻe o ka polymerization ke kumu kumu e hoʻoholo ai i ka viscosity o PDMS.
He kaulahao laina -ka mole mole o PDMS, me ka wae hou ana he -Si(CH₃)₂-O-, a ua hiki ke hoikeia kona kumu hoohalike penei: (CH₃)₃SiO-[Si(CH₃)₂ -}} o -}} (CH₃)₃ kahi n ka degere o ka polymerization (ka helu o nā ʻāpana hana hou).
ʻO ke kiʻekiʻe o ka polymerization (ʻoi aku ka nui o ka n): ʻoi aku ka lōʻihi o ke kaulahao molekala, ʻoi aku ka ikaika o nā pūʻali van der Waals (ʻoi aku ka nui o ka dispersion forces) ma waena o nā molekala, a ʻoi aku ka kiʻekiʻe o ka entanglement degere ma waena o nā kaulahao, ka hopena i ka wai ʻilihune a ʻoi aku ka viscosity. ʻO ka haʻahaʻa o ka polymerization (ʻoi aku ka liʻiliʻi o ka n), ʻoi aku ka pōkole o ke kaulahao molekula, ʻoi aku ka nāwaliwali o nā ikaika intermolecular, ʻoi aku ka liʻiliʻi o ka entanglement, ʻoi aku ka maikaʻi o ka wai, a me ka haʻahaʻa o ka viscosity.
No ka la'ana, he ha'aha'a ke degere o ka polymerization o -viscosity PDMS ha'aha'a (e like me 100 mm²/s) (n he mau 'umi paha). Hiki ke kiʻekiʻe ke kiʻekiʻe o ka polymerization o -viscosity PDMS kiʻekiʻe (e like me 100,000 mm²/s) i nā haneli a i ʻole mau tausani.