Ahịrị Mgbakwunye Plastik gbasara Ihe E Ji Eme Ihe: Njirimara na Ojiji nke Polyphenylene Sulfide PPS Resin Dị Elu

Ahịrị Mgbakwunye Plasticgbasara Ihe Ndị Dị Mkpa
Polyphenylene sulfide bụ ụdị plastik ọhụrụ nke ọrụ injinia. Mkpụrụ ndụ ya nwere nkeji nhazi nke p-phenylene sulfide ugboro ugboro, isi usoro nke mkpụrụ ndụ ahụ nwekwara phenylene sulfide. Ibu molekul ya bụ 10,000-50,000. Polyphenylene sulfide bụ polima kwụ ọtọ ma ọ bụ nke nwere alaka na-enweghị ebe agbaze kristal. Ọ bụ nhazi kwụ ọtọ tupu njikọta na nhazi thermosetting mgbe njikọta gafere. Enwere ike ime ka ọ dị nro ruo n'ókè ụfọdụ mgbe a na-ekpo ọkụ ma jụọ oyi nke ọma.


A na-esi na sodium sulfide na dichlorobenzene nweta polyphenylene sulfide n'ime ihe mgbaze polar siri ike. Usoro mmepụta ya gụnyere usoro Michael, usoro p-halogenated thiophenate self-condensation, usoro aromatic polyhalide na usoro alkali metal sulfide solution polycondensation, wdg.

Njupụta nke polyphenylene sulfide bụ 1.36, resin ahụ bụkwa ntụ ntụ ọcha ma ọ bụ granules, siri ike ma gbawaa agbawa, nwere nnukwu kristal na oke ịgbaze siri ike. Polyphenylene sulfide nwere ụdị ibu molekul abụọ, obere ibu molekul na nnukwu ibu molekul. N'ihi oke mmiri ịgbaze, ọ na-esiri ike ịkpụzi ozugbo, yabụ na mgbakwunye na ịgbaze, ụzọ ndị ọzọ ga-enwerịrị njikọ cross-link n'oge ịkpụzi, a ga-agwakọtakwa ụfọdụ eriri iko ma ọ bụ resin inorganic maka ịkpụzi injection, ịkpụzi na ịkpụzi extrusion. na jupụta. Polyphenylene sulfide dị elu anaghị achọ njikọ cross-linked ma enwere ike iji ya ozugbo na nhazi nke ngwaahịa plastik.



PPS nwere ọkpụkpụ azụ siri ike nke nwere symmetrical ma bụrụ akụkụ nke kristal polymer nke mejupụtara mgbanaka benzene para-substituted na atọm sọlfọ na-emegharị. PPS bụ plastik injinia pụrụ iche nke nwere arụmọrụ dị elu yana ebe agbaze dị elu nke ruru 280 °C nke nwere ike dochie ọla. Ọ dị n'elu pyramid arụmọrụ polymer, dịka egosiri na Foto 1. N'ihi nke a, dabere na arụmọrụ dị mma nke PPS resin, ọ na-emezu ihe achọrọ maka ọrụ plastik injinia siri ike.



1. Àgwà nke resin polyphenylene sulfide dị elu
(1) Resin PPS dị elu bụ polima kristal nwere ike siri ike. Ihe dị na kristal ya dị ihe dị ka 65%. Ọsọ kristal ngwa ngwa, ezigbo mmiri mmiri na okirikiri ịkpụzi dị mkpụmkpụ.

(2) Ọ na-eguzogide okpomọkụ nke ọma. Ebe agbaze ya nwere ike iru 275 ~ 291°C, okpomọkụ mgbaze okpomọkụ bụ 135°C, okpomọkụ mgbaze okpomọkụ mgbe ejiri eriri iko mee ka ọ sie ike nwere ike iru 260°C. N'ikuku na nitrogen, okpomọkụ mbụ na nke na-adịghị ike nke polyphenylene sulfide dị ihe dị ka 400°C, ọ na-agbaze n'ikuku na 700°C, ma ka nwere ike ịnọgide na-enwe 40% nke ibu ya na gas na-adịghị arụ ọrụ na 1000°C. Okpomọkụ ojiji ogologo oge bụ 200 ~ 240°C, mgbochi okpomọkụ gas na nkwụsi ike okpomọkụ ogologo oge na-aga n'ihu dị elu karịa plastik injinia niile dị ugbu a.

(3) O nwere ezigbo ihe eji arụ ọrụ. Ọ nwere oke ike siri ike, oke ike elu, obere mbelata na ike siri ike n'ọnọdụ oke iru mmiri, ma nwee ezigbo ike iguzogide mmiri, ike ọgwụgwụ na ike ọgwụgwụ. Enwere ike ime ka ike ya ka mma site na ijupụta mmanụ dị ka fluororesin na eriri carbon. Ma ka mma nke ukwuu.

(4) O nwere ezigbo nguzogide nchara na nguzogide kemịkalụ. Na mgbakwunye na asịd oxidizing siri ike (dịka asịd sulfuric concentrated, nitric acid, wdg), ọ nwekwara ike iguzogide nguzogide nke asịd ndị ọzọ, alkalis na nnu, ọ naghịkwa agbaze na ihe mgbaze organic ọ bụla dị n'okpuru 200 ° C. Nguzogide nguzogide nguzogide ya fọrọ nke nta ka ọ bụrụ nke polytetrafluoroethylene. Na mgbakwunye, PPS nwekwara ezigbo nguzogide ihu igwe na radieshon, arụmọrụ ya agaghịkwa emetụta site na ọtụtụ ultraviolet na gamma-ray radieshon na neutron radieshon siri ike.

(5) O nwere obere ọnụego nnabata mmiri (naanị 0.008%) na ọnụego nnabata mmanụ. Obere mbelata ịkpụzi na oke mgbasa nke ahịrị, ngwaahịa a nwere akụkụ kwụsiri ike na obere mgbanwe, ọ ka nwere ike ịnọgide na-enwe nkwụsi ike nha ọbụlagodi na gburugburu ebe ikuku dị mmiri mmiri, mmanụ na nke na-emebi emebi, yabụ enwere ike iji ya maka ịkpụzi ihe ziri ezi.

(6) Njirimara eletriki magburu onwe ya. Resin PPS dị elu anaghị agbanwe agbanwe na nguzogide olu n'okpuru oke okpomọkụ na oke iru mmiri, ọ naghị agbanwekwa mgbe ọ na-agbanwe okpomọkụ na ugboro ole ọ na-eme. Na mgbakwunye, ọdịnaya nke ihe ndị na-adịghị ọcha nke ion dị ala, enwere ike mikpuo ya na bat solder na 260 ° C, yabụ ọ nwere ike iguzogide nchacha elu. Ọkụ ọkụ nke ihe ndị mejupụtara eletrọnịkị, dabara adaba maka ngwaahịa nwere oke ihe achọrọ na arụmọrụ eletriki. Ọ nwere nnukwu nguzogide na obere ihe dielectric.

(7) Resin PPS dị elu nwere oke viscosity agbaze nke ukwuu yana ezigbo mmiri mmiri. Ọ dị mfe ịgba mmiri ma metụ eriri iko aka, yabụ ọ dị mfe ijupụta. Eriri iko ma ọ bụ ihe na-eme ka ihe na-eme ka injection molding sie ike nke e ji ya kwadebe nwere nnukwu iguzogide mmetụta, iguzogide mgbagọ na ductility.

(8) Resin PPS dị elu nwere ike ijikọ nke ọma na iko, aluminom, ígwè anaghị agba nchara, wdg. Ike njikọ na iko karịrị nke iko.