Isiokwu a na-ekpuchi otú e si dakọtara mkpuchi igwe akara ọsọ na oven ogologo iji hụ na organosilicon nrapado esịmde lekwasịrị curing ogo maka elu-okpomọkụ PTFE teepu. Ụkpụrụ kwekọrọ n'isi: ngụkọta oge obibi t_total = ogologo oven dị irè L ÷ ahịrị ọsọ v ga-abụrịrị obere oge ọgwụgwọ achọrọ. Nweta njirimara ọgwụgwọ site na DSC ma ọ bụ nrapado ọgwụgwọ ule na-ewepụta mmekọrịta 'okpomọkụ - opekempe ọgwụgwọ oge' mmekọrịta. Nkwekọrịta ọgwụgwọ nhata: kewaa oven n'ime mpaghara, gbakọọ ti = Li/v na tcure(Ti), hụ ∑(ti/tcure(Ti)) ≥1. Usoro ngụkọ: tọọ mpaghara okpomọkụ nwere ogologo Li na okpomọkụ Ti; setịpụ ọsọ ahịrị v, gbakọọ oge obibi mpaghara ọ bụla na oke onyinye; megharịa ruo mgbe ngụkọta ≥1 (oke nchekwa 1.1-1.2 tụrụ aro).

Isiokwu a na-ekpuchi ụzọ iji chịkwaa crystallinity nke mkpuchi PTFE na akwa akwa okpomọkụ nke Teflon. Nhazi ọnụego jụrụ oyi na-akachasị mma ma dị irè: Ngwa ngwa jụrụ oyi (imenyụ) site na ákwà mgbochi ikuku oyi, igwe na-eme ka mmiri dị jụụ ma ọ bụ tankị mmiri - agbụ molekụla na-adaba tupu e nye ya ndokwa, na-akpụ obere kristal na-ezughị okè; mkpuchi dị nro, siri ike na arụ ọrụ anaghị arụ ọrụ nke ọma, obere ike ike / eyi nguzogide. Ngwa ngwa jụrụ oyi (annealing) site na ngalaba nchekwa okpomọkụ na 10-50 ° C / h ma ọ bụ ọkụ ọkụ - ụdọ molekụla na-ahazi n'ụzọ zuru ezu n'ime nnukwu spherulites zuru oke; mkpuchi nwere nnukwu isi ike, nkwụsi ike na-eyi pụtara ìhè, akụkụ kwụsiri ike, mbelata mgbanwe na ụbara brittleness.

Isiokwu a na-ekpuchi ngwa nke Teflon akwa na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ. Enwere ike ime ya: enwere ike iji ya dị ka ihe nkuku na-adịghị akwagide na eriri ntupu ma ọ bụ trays mgbe ọkụ ọkụ ≤260ºC (obere okpomọkụ ihicha, ewepu ihe nkedo, slurry curing) - na-eme ka nrụpụta na nrụpụta ọrụ dị mma. Amachibidoro nke ọma na ọkara / okpomọkụ dị elu (300-950 ° C) - PTFE decomposes na-ahapụ HF na-egbu egbu na perfluoroisobutylene, akụrụngwa na-emebi emebi ma na-ebute nsị na-egbu egbu. Ụkpụrụ nchekwa: ọ bụrụ na ọkụ ọkụ edoghị anya ma ọ bụ enweghị ike ịkwenye n'okpuru 260C, ejila ya. Njirimara isi: ọrụ na-aga n'ihu -70 ° C ruo 260 ° C, obere oge 300 ° C; oké enweghị osisi na chemical inertness; ezigbo mkpuchi eletrik; obere esemokwu (~ 0.04); fiberglass base na-enye ike tensile dị elu.

Isiokwu a na-atụnyere iche n'etiti infrared radieshon kpo oku na-ekpo ọkụ-ikuku mgbasa kpo oku ụzọ on crosslinked Ọdịdị uniformity nke silicone nrapado n'ígwé. Usoro nnyefe ọkụ: ikuku na-ekpo ọkụ na-adabere na convection-conduction na ịrị elu okpomọkụ dị nro, obere ọdịiche dị n'ime / mpụta; IR nwere ntakịrị omimi ntinye ya na nnabata elu siri ike (iri na iri na narị micrometers) na-eke gradient dị elu-ruo n'ime. Mmetụta dị na crosslink uniformity: ikuku na-ekpo ọkụ na-enyere aka ịgwọ ọrịa n'ime na n'èzí na njupụta crosslink otu; IR na-eme ka oyi akwa dị n'elu na-etolite ngwa ngwa 'ihe nkiri akpụkpọ ahụ' nke na-egbochi mmeghari okpomọkụ na imegharị agbụ dị n'ime, na-emepụta njupụta njikọ njikọ na-agbada site n'elu ruo n'ime.

Isiokwu a na-ekpuchi iche n'etiti PTFE emulsions emepụtara site nkwusioru polymerization vs dispersion polymerization. Nkọwa: polymerization nkwusioru enweghị ike ịmepụta emulsion PTFE ozugbo; ezigbo emulsion PTFE na-abịa naanị site na polymerization mgbasa. 'Ụzọ nkwusioru emulsion' bụ n'ezie nkwusioru mmiri nke nkwusioru ala-polymerized resin micropowders. polymerization mgbasa (primary emulsion): Spherical ahụ (0.1-0.3μm, warara nkesa), kwụsie ike site perfluorinated surfactants, kemgwucha molekụla arọ (> 94% crystallinity), ike fibrillation, na-achọ 380 ° C sintering na-etolite na-aga n'ihu siri ike film.

Isiokwu a na-ekpuchi otu esi ejikọta okpomọkụ decomposition na ọkara ndụ nke peroxide crosslinking agents (BPO na DCP) na windo usoro ọgwụgwọ maka Teflon teepu. Isi data: BPO - 1-min ọkara ndụ na ~ 131 ° C, 1-hr na ~ 92 ° C, 10-hr na ~ 72 ° C; DCP — 1-min na ~171°C, 1-hr na ~135°C, 10-hr na ~115°C. Echiche dabara adaba: nrapado chọrọ 97-99% crosslinking = 5-7 ọkara ndụ; oge ọgwụgwọ = 5-7 × ọkara ndụ na ọnọdụ okpomọkụ. Back-gbakọọ okpomọkụ site na mmepụta ahịrị obibi oge ma ọ bụ azụ-gbakọọ oge site na kacha ekwe okpomọkụ.

Isiokwu a na-ekpuchi ahụkarị ahịrị ọsọ nso maka PTFE elu-okpomọkụ ákwà impregnation mmepụta akara. Ọsọ ọsọ: 2-15 m / min, oke arụ ọrụ kwụsiri ike 3-8 m / min, akwa dị mkpa / ahịrị ọsọ dị elu ruo 10-15 m / min. Mgbochi si impregnation penetration: ákwà ga-n'ụzọ zuru ezu jupụta na PTFE emulsion n'ime eriri ngwugwu interiors - oke ọsọ na-akpata ezughị ezu impregnation, resin agụụ na akọrọ emep uta eri; emulsion viscosity, ihe siri ike itinye uche, njupụta akwa akwa niile na-ebelata ọnụego ntinye, na-achọ ngwa ngwa ngwa ngwa maka akwa akwa / akwa. Mkpuchi mkpuchi: ọtụtụ ngafe (2-6+) achọrọ maka mkpuchi enweghị ntụpọ; mbụ ngafe ji nwayọọ nwayọọ maka ikwado, ngafe ndị na-esote nwere ike ịbawanye ntakịrị.

Isiokwu a na-atụnyere iche n'etiti infrared radieshon kpo oku na-ekpo ọkụ-ikuku mgbasa kpo oku on crosslinked Ọdịdị uniformity nke silicone nrapado oyi akwa. Usoro mbufe ọkụ: ikuku na-ekpo ọkụ bụ convection-convection, dị nwayọọ ma na-aga n'ihu, na-emepụta gradient okpomọkụ na-agafeghị oke; IR bụ mmịpụta radieshon nwere oke mmịfe elu (micrometers ruo millimeters) na-eke gradient dị elu-ruo n'ime. Mmetụta dị na nkesa njupụta nke crosslink: ikuku na-ekpo ọkụ na-enye ohere ka akụkụ ime na mpụta banye n'ime oke okpomọkụ nke fọrọ nke nta ka ọ bụrụ n'otu oge, na-emepụta njupụta crosslink otu na oke; IR na-eme ka oyi akwa dị n'elu gwọọ ozugbo na-etolite akpụkpọ anụ nke na-egbochi nnyefe okpomọkụ, na-ebute gradient dị nkọ nke njupụta crosslink na-ebelata site na elu ime.

Edemede a na-ekpuchi ọdịnaya silica yana ihe ngosi ngwa nke akwa akwa iko silica dị elu. Nkọwa ọdịnaya nke silica: isi ihe ngosi bụ SiO₂ ≥96% (ọkọlọtọ 96-98%, akara akara>99% site na leaching acid na sintering, na-abịaru nso eriri quartz dị ọcha). Nrụpụta: akwa E-glass na-enweta mmiri acid na-ekpo ọkụ ka ọ gbazee ihe ndị na-abụghị silica (boron oxide, sodium oxide), na-emepụta ọkpụkpụ silica dị elu, wee sintered maka densification. Uru ndị isi: ọrụ na-aga n'ihu na 900 ° C na ikuku oxidizing, obere oge karịa 1200 Celsius, ebe nro dị nso na 1700 ° C; nkwụsi ike kemịkalụ megide ọtụtụ acid / alkalis ma e wezụga HF na acid phosphoric na-ekpo ọkụ; obere dielectric mgbe niile na mkpuchi kwụsiri ike na oke okpomọkụ.

Isiokwu a na-akọwa microstructural e ji mara Teflon elu-okpomọkụ ákwà. Ọkpụkpụ mkpụrụ: udidi eriri enyo enyo na-akpa akwa na larịị / twill na-akpa akwa nwere oke porosity (micron-scale pores n'ime eriri eriri yana na oghere warp-weft) na-enye ohere maka impregnation PTFE. Mkpuchi morphology: full impregnation encapsulation akpụ ' ike siri ike ' Ọdịdị ebe iko emep uta eri na-ewusi usoro, PTFE bụ na-aga n'ihu matrix; n'elu nodular microstructure nke nodules (ahụhụ) jikọtara ọnụ site na fibrils dị mma nke e guzobere n'oge sintering; oyi akwa akpụkpọ anụ na-aga n'ihu (ọtụtụ ruo iri iri nke microns gbara ọkpụrụkpụ) nke PTFE dị ọcha dị ka ihe mgbochi isi maka inertness kemịkalụ, ihe ndị na-abụghị osisi, na mkpuchi eletrik.