Hauv peb lub neej txhua hnub, peb tsis tshua xav txog kev tshawb fawb keeb kwm plastics, tab sis qhov sib txawv ntawm ntau hom yuav tseem ceeb. Niaj hnub no, peb yuav tshawb ob lub teeb tseem ceeb: thermosets thiab thermoplets, thiab nkag siab lawv qhov sib txawv.
Thermosets: muaj zog thiab ruaj khov
Cov lauj kaub yas thiab cov lauj kaub uas peb siv txhua hnub yog tsim los ntawm thermosetting resins, uas, ib zaug diav thiab tsis txhob muag muag lossis deform. Cov cuab yeej no ua rau lawv muaj zog heev, tso cai rau lawv ua kom muaj kev kub ntxhov thiab tshuaj lom neeg. Hauv kev lag luam Aerospace, ntau lub teeb ci ntawm cov dav hlau thiab satellites yog ua los ntawm cov thermoset cov ntaub ntawv xws li epoxy resins. Cov ntaub ntawv no tsis tsuas yog muaj zog, tab sis tseem lub teeb yuag, uas nce davhlau efficiency.
Kev lag luam automotive yog lwm tus neeg siv loj ntawm thermosets. Los ntawm lub tsheb lub cev mus rau sab hauv thiab cov khoom sib xyaw ua ke, thermoset cob yog siv dav. Lawv lub siab tiv thaiv kub tsis kam ntseeg tau kev ua tau ruaj khov txawm nyob rau hauv huab cua. Tsis tas li ntawd, thermoset resins tau siv dav hauv cov khoom siv hluav taws xob thiab cov tsev hauv hluav taws xob vim lawv lub siab, tiv thaiv cov khoom sib txawv ntawm kev puas tsuaj.
Thermosets tseem siv nyob rau hauv lub nkoj hulls thiab cua tshuab ncho Cov ntaub ntawv no yog qhov ruaj khov kho thiab muaj kev tiv thaiv zoo heev rau huab cua thiab kev laus, ua rau lawv zoo tshaj rau kev siv ntev.
Thermoplastic Resins: hloov tau thiab ntau yam
Tsis zoo li thermoset resins, thermoplastic besins soften thaum rhuab thiab tawv tawv thaum txias. Cov cuab yeej no, zoo ib yam li Play-DoH, tso cai rau lawv ua kom rov qab ua thiab rov kho dua, ua rau lawv zoo tagnrho rau ntau tus neeg siv khoom.
Ntau yam khoom hauv tsev xws li cov khoom ua si, khoom siv ntim khoom noj, thiab cov tsev xov tooj ntawm tes yog tsim los ntawm cov xov tooj thermoplastic xws li lub computer (pypropylene (pp), lossis polycarbonate (pc). Tsis tsuas yog lawv pheej pheej yig, tab sis lawv kuj yog cov khoom lag luam ceev thiab tsim nyog rau huab hwm coj ntau lawm. Ntxiv rau, thermoplastic resins yog rov ua dua tshiab, uas yog qhov tseem ceeb kom txo cov khib nyiab yas.
Hauv kev kho tsev kho mob, cov koob txhaj tshuaj uas tau tso tseg thiab IV Cov ntaub ntawv no muaj kev nyab xeeb, tsis muaj tshuaj lom, yooj yim rau kev ua stervelt thiab yooj yim los pov tseg tom qab siv. Kev lag luam hauv tsheb kuj yog fav noob thermoplastic cass rau bumers, dashboards, thiab lwm yam sab hauv sab hauv kev haum thiab ua kom haum.
Tab sis thermopoplastic resins muaj ntau dua li yooj yim. High-zoo thermoplastic resins outperform thermoset resins. Piv txwv li, Polyetherketone (Peephphenylene sulfide (pps) cov khoom siv hluav taws xob tsis yeem, thiab cov khoom siv zoo dua.
