Iji rheological omume nke polima gbazee bụ n'ụzọ ziri ezi e ji extrusion nhazi site ịghasa ike shiee edinam..Usoro nhazi na nhazi data,nke a na-eji tụọ viscosity shiee nke polymer na-agbaze site na iji screw extruder capillary.
A na-edozi ọtụtụ ihe polymer na steeti gbazee, nke na-agụnye ịgbaze agbaze na nrụrụ, nke ọ bụghị nanị na-emetụta usoro nhazi n'onwe ya, kamakwa na-emetụta arụmọrụ ikpeazụ nke ngwaahịa ahụ.Ya mere, ọmụmụ ihe gbasara rheological Njirimara nke ihe polymer bụ isiokwu na-ekpo ọkụ.Ntụle ziri ezi nke rheological paramita bụ ihe ndabere nke nyocha miri emi nke akụrụngwa rheological.
Shear viscosity bụ oke dị mkpa iji mara omume rheological.Ihe a na-akpọ viscosity shear nke polymer melt bụ oke nke nrụgide siri ike na ọnụ ọgụgụ shear nke na-agbaze na-agbaze n'ime usoro nhazi.Mgbaze polymer na-akpata mmiri mmiri pseudoplastic, na omume na-asọpụta ya nwere njirimara nke ịkpụ ntutu.Ọ na-adịkarị mkpa iji usoro njikọ dị n'etiti shear viscosity na shear rate, ya bụ shear viscosity spectrum, iji gosipụta n'ụzọ zuru ezu njirimara nhazi nke polymer gbazee.
Ụzọ bụ isi a na-eji atụ viscosity gbazee bụ ịgbalị ime ka mgbaze ahụ na-esi na tube capillary dị ogologo ma dị gịrịgịrị, dị ka tube capillary gburugburu.Enwere ike ịgbakọ nrụgide ịkwa ahụ site n'ịtụ ụda nrụgide na nsọtụ abụọ nke agbaze ka ọ na-agafe na tube capillary.Enwere ike ịgbakọ ọnụ ọgụgụ nke nchara site n'ịtụ mgbaze nke agbaze kwa oge nkeji.Ya mere enwere ike nweta viscosity gbazee.
Ụzọ a na-emekarị iji nweta agbaze na tube capillary bụ iji piston propulsion.Uru nke usoro a bụ na ọ na-eji ihe nyocha ole na ole ma nwee ike nweta nrụgide siri ike dị elu.Igwe rheometer capillary dị elu na-adabere n'ụkpụrụ a. Otú ọ dị, adịghị ike nke usoro ule a bụ na a pụghị ịnwale ihe ahụ n'okpuru ọnọdụ nhazi n'ezie, ọ na-esikwa ike inweta ihe ndị na-emepụta ihe na-emepụta ihe nke polymer gbazee mgbe a na-edozi ya.Karịsịa n'ime ọmụmụ nke ngwakọta ngwakọta nke ọtụtụ ihe polymer, na-agbaze polymer chọrọ ihe siri ike nke ịghasa iji nweta nzube nke ngwakọta.Rheometer capillary nrụgide dị elu adịghị mma maka ịnwale ihe ndị dị otú ahụ.
Ngwa nyocha nke screw extrusion capillary rheological nwere ike dozie nsogbu ndị dị n'elu.Ngwaọrụ na-eji ike mkpali nke skru mee ka polymer gbazee site na tube capillary.Ya mere, enwere ike tụọ viscosity shear nke polymer gbazere n'okpuru ọnọdụ dị nso na nhazi n'ezie.Usoro a dabara adaba maka ịlele njirimara rheological nke ihe thermoplastic na ngwakọta ha.N'ihi na nha simulates ezigbo nnwale gburugburu, ndị enwetara ule parameters nwere ike ọzọ n'ụzọ ziri ezi na-akọwa omume nke ihe na n'ezie nhazi.
Enwere ike tụọ ụdị viscosity shear nke polymer melts site na iji ngwa nnwale pụrụ iche, dị ka rheometer capillary nrụgide dị elu, ma ọ bụ ngbanwe jikọtara ọnụ.Otú ọ dị, ngwaọrụ ndị a dị oke ọnụ ma na-ejedebe na iji ya eme ihe, karịsịa na ntinye nke mmepụta mmepụta ihe dị ukwuu.N'ezie, ọ dịghị mkpa ịdabere na ngwá ọrụ ule pụrụ iche, ọ bụrụhaala na ụkpụrụ nyocha nke shear viscosity, ị nwere ike iji obere obere ihe nkedo dị mfe.extruderna ebu capillary, mebere ngwaọrụ nnwale viscosity spectrum shear dị ọnụ ala.Ejikọtara ya na nhazi data kọmpụta, enwere ike nweta shear viscosity spectrum nke polymer melt ngwa ngwa na ngwa ngwa.Usoro a dabara nke ọma maka obere ụlọ ọrụ dị obere na nke ọkara iji mepụta mmepe ngwaahịa na nyocha akụrụngwa.
Oge nzipu: Jul-26-2019