Wararka - Sida loo xalliyo dhibaatada midabka jaalaha ah ee xabagta aan saturated

Sida walxo isku dhafan,xabagta polyester-ka aan saturated lahaynayaa si fiican loogu isticmaalay dahaarka, caagadaha la xoojiyay fiber-ka, dhagaxa macmalka ah, farsamada gacanta, iyo goobo kale. Si kastaba ha ahaatee, midabka huruudda ah ee resins aan saturated ayaa had iyo jeer dhibaato ku ah soosaarayaasha. Sida laga soo xigtay khubarada, sababaha caadiga ah ee jaalaha ah ee resins aan saturated ahayn waxaa ka mid ah kuwan soo socda:

1. Inta lagu guda jiro habka synthesis esterification ee resin unsaturated, ay sabab u tahay kuleyl gabow huruud ah oo ay sababtay heerkulka sare, heerkulka esterification guud ee xabagta unsaturated waa 180 ~ 220 ° ama xataa ka sareeya, heerkulka this xabagta waa ay fududahay in la huruud isu beddelo sababtoo ah ilaa gabowga kulaylka, saameynaya muuqaalka alaabta resin.

2. Huruuda ay keento soo-gaadhista xabagta fallaadhaha ultraviolet waxa inta badan sababa joogitaanka giraanta benzene ee xabagta (oo ay ku jiraan caraf udgoon dibasic acids/anhydrides iyo benzene giraanta ay soo bandhigtay styrene), taas oo laga yaabo inay sabab u tahay oksaydhka kulaylka ee udgoonka xeryahooda heerkulka sare. Hoosudhac, waxay u nugul tahay isbeddelka elektaroonigga ah, taasoo ka dhigaysa resin jaalle ah.

3. Inta lagu jiro habka wax soo saarka resin, alaabta ceeriin waxay la kulmaan ogsijiinta sababtoo ah waxqabadka xiritaanka ee liita ee qalabka. Silsiladda molecular ee polyester-ka guud ee aan qoyanayn kuma koobna oo keliya kooxaha ester-ka, kooxaha meridian, iyo kooxaha antelope, laakiin sidoo kale xidhidhyo labanlaab ah iyo siddo caraf udgoon. Waxay maraysaa heerkul-xumo, iyo waxqabadka muuqda ayaa ah in midabka resin-ku isu beddelo huruud.

4. Saamaynta waxyaabaha lagu daro sida antioxidants, polymerization inhibitors, wakiilada daawoyinka, iwm. Amine antioxidants ayaa si fudud loogu beddelaa xag-jirrada xorta ah ee nitroxide si ay u midabeeyaan alaabta. Celiyeyaasha polymerization ee sida caadiga ah loo isticmaalo, sida hydroquinone, ayaa Oxidation galay quinones iyadoo ay joogaan quinones, kuwaas oo laftoodu midab leh, sidaas darteed saameynaya midabka resinka. Qaar ka mid ah soosaarayaasha daawada dawooyinka ayaa wali isticmaala nidaamyada aminiga acyl peroxide-sare iyo nidaamyada saabuunta birta ee ketone peroxide. Midab leh, midab si fudud loo samayn karo.

Dabcan, waxaa jira sababo kale oo keena in resinku isu rogo huruud. Guud ahaan, oksijiinta kulaylka iyo fallaadhaha ultraviolet ayaa ah sababaha ugu weyn ee jaalaha ah. Dibasic acid saturated (ama anhydride acid) ayaa loo isticmaalaa halkii laga isticmaali lahaa aromatic dibasic acid (ama anhydride acid), inkasta oo loo isticmaali karo ilaa xad, midabka xabagta ayaa laga dhigi karaa mid fudud, laakiin iyadoo la tixgelinayo arrimo kala duwan sida waxqabadka resin iyo kharashka, habkani maaha mid ku habboon.

Sida laga soo xigtay khubarada, marka lagu daro buuxinta gaaska qallafsan ee habka wax soo saarka iyo kaydinta si looga hortago xidhiidhka oksijiinta inta ugu badan ee suurtogalka ah, habka waxtarka leh ayaa ah in lagu daro antioxidants iyo ultraviolet absorbers, taas oo si wax ku ool ah uga hortagi karta jaalaha polyester-ka. Xalka huruud-ka-hortagga ee uu khabiirku ku taliyay ee xabagta aan dhergin waa:

Antioxidants aan ku jirin amiinada ayaa la doortaa, iyo antioxidants aasaasiga ah iyo kuwa caawiya ayaa la isku daray. Antioxidants-yada aasaasiga ah ayaa badanaa ah phenols xannibaad, kuwaas oo qaban kara peroxides free radicals; Kaaliyaha antioxidants waa phosphites, kaas oo Marka uu burburiyo hydroperoxide, waxay sidoo kale chelate kartaa ions birta si ay uga hortagto resin ka soo baxa midabka oksida. Haddii aad rabto inaad sii wanaajiso iska caabbinta jaalaha ah iyo iska caabinta cimilada, waxaa lagugula talinayaa inaad ku darto nuugeeyaha UV. Ku darida xuubka UV wuxuu si wax ku ool ah u joojin karaa ifafaale jaalaha ah ee walxaha polymer ee hoos yimaada ficilka shucaaca ultraviolet, waxayna siisaa ilaalin aad u fiican sheyga, si wax ku ool ah uga hortagto Yaraynta dhaldhalaalka, jiilka dildilaaca, goobooyin, iyo delamination waxay si weyn u hagaajin kartaa caabbinta cimilada ee alaabta, oo waxa ay leedahay saamayn synergistic wanaagsan marka si wadajir ah loo isticmaalo antioxidants. Dabcan, isticmaalka antioxidants iyo nuugayaasha UV asal ahaan ma xallin karaan dhibaatada jaalaha ah, laakiin tiro cayiman, waxay weli si wax ku ool ah uga hortagi kartaa huruudiyaha oksaydhka ee alaabada polyesterka ee aan saturated ahayn, waxay ilaalisaa midabka biyaha badeecada mid hufan, waxayna hagaajinaysaa tayada badeecada. darajo.

OurBeestarka polyester-ka ee aan saturated lahaynwaxaa lagu heli karaa noocyo kala duwan, iyo sidoo kale resins aan huruud ah, sida soo socota: