Hloov kho nylon yog ib qho yas engineering tau los ntawm kev hloov kho nylon los ntawm kev siv lub cev lossis tshuaj. Nws muaj cov khoom zoo heev, feem ntau suav nrog cov khoom siv thermal, cov khoom siv kho tshuab, thiab lwm yam khoom.
Temperature Properties
Cov khoom kub xws li iav hloov qhov kub (Tg) thiab melting point (Tm); kub kub distortion kub (HDT), feem ntau ntawm 180℃thiab 250 degree; siab ntev -lub sij hawm ua haujlwm kub (UL-746B); dav kev pab kub ntau yam; thiab qis coefficient ntawm thermal expansion.
Mechanical Properties
Mechanical zog muaj xws li lub zog siab, siab mechanical modulus, qis creep, muaj zog hnav tsis kam, thiab qaug zog ua haujlwm. Piv txwv li, nylon 66 nrog 30% iav fiber ntau muaj lub zog tensile txog li 185 MPa thiab lub zog flexural txog li 260 MPa. Toughened modified nylon muaj zoo toughness thiab cuam tshuam tsis kam thiab muaj peev xwm tswj tau zoo cuam tshuam tsis kam ntawm qhov kub thiab txias, xws li -30 degree. Lub tensile thiab flexural lub zog ntawm aramid fiber reinforced nylon 6 composites tau txhim kho, tab sis qhov cuam tshuam kev ua tau zoo yog txo me ntsis. Lwm yam khoom muaj xws li tshuaj tiv thaiv, hluav taws xob conductivity, nplaim retardancy, huab cua tsis kam, thiab zoo heev dimension stability. Hloov kho nylon nthuav tawm zoo corrosion kuj rau ntau yam tshuaj, tshwj xeeb tshaj yog acids, alkalis, thiab roj, thiab tuaj yeem siv sab nraum zoov mus ntev yam tsis muaj kev cuam tshuam los ntawm UV hluav taws xob lossis kev hloov huab cua.
Vim muaj zog polarity ntawm PA, nws muaj hygroscopicity siab thiab tsis zoo seem stability, tab sis qhov no tuaj yeem txhim kho los ntawm kev hloov kho.
Cov yam ntxwv ntawm kev ua tau zoo thiab cov txheej txheem yuav tsum tau ua ntawm ntau hom kev hloov kho: nplaim taws- PA retardant muaj cov nplaim hluav taws xob, feem ntau ntawm cov decompose yooj yim ntawm qhov kub thiab txias, tso cov kua qaub uas corrode hlau. Yog li ntawd, plasticizing Cheebtsam yuav tsum tau hard chrome plating, thiab cov txheej txheem yuav tsum tswj lub chim kub thiab txhaj ceev. Huab cua- tiv taus PA suav nrog UV- nqus cov khoom ntxiv xws li cov pa roj carbon dub, uas ua rau cov hlau hnyav dua.
Yog li ntawd, nws yuav tsum muaj kev sib xyaw ua ke ntawm cov ntsia hlau thiab cov thoob nrog cov khoom noj muaj peev xwm thiab siab hnav tsis kam. Pob tshab PA muaj lub zog tensile zoo thiab cuam tshuam tsis kam, siab lub teeb xa mus, thiab ua haujlwm kub ntawm 300-315 degree. Kev tswj nruj ntawm lub thoob qhov kub thiab txias pwm yog tsim nyog.
Hloov kho cov ntaub ntawv nylon pom cov yas deformation tseem ceeb tom qab tensile yielding yam tsis muaj nkig tawg. High nam piv hloov sericite- txhawb nqa nylon 6 qhia tau hais tias muaj kev txhim kho zoo heev. Potassium titanate whiskers, tom qab kev hloov kho deg nrog elastomers, zoo toughen nylon 66. DSP qaum exhibits superior tshav kub tsis kam thiab seem stability piv rau hloov nylon 66 qaum; piv rau siab -modulus, qis-shrinkage polyester qaum, hloov nylon 66 qaum muaj zog dua thiab ruaj khov, tab sis me ntsis qis dua qhov ruaj khov. Nws nthuav tawm qhov ua tau zoo qis- qhov kub thiab txias, nrog rau qhov tsis muaj qhov cuam tshuam lub zog Ntau dua lossis sib npaug ntawm 55kJ / m² (ISO 179-}1) thiab tensile zog tuav Ntau dua lossis sib npaug li 88% ntawm -35℃. Cov nylon toughening tshuab tsim los ntawm Beijing University of Chemical Technology siv cov txiv neej anhydride-grafted polyolefins los yog olefin copolymer ua cov tshuaj toughening. Ntxiv 8% mus rau 10% rau nylon tuaj yeem txhim kho nws qhov hnyav, thiab thaum qhov sib ntxiv yog 15% mus rau 20%, nws tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm cov nylon ultra-tawv.