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Cho mng c v cc bn lng nghe bui thuyt trnh
Cho mng c v cc bn lng nghe bui thuyt trnh
B CNG THNG TRNG I HC CNG NGHIP THC PHMMn hc:VT LIU COPOSITEGing vin: Nguyn Hng Thy
2H Th Kiu ML Th Thanh TrcNguyn Thanh Vngo Tin ThnhDanh sch nhm tiTm hiu nguyn liu EPOXY3NI DUNG4Epoxy l tn goi chung cho tt ca cac loai nha tng hp co cha nhom epoxy trong cu truc phn t, chung c xem nh monomer khng co lin kt ngang hay oligomer co cha nhom epoxy.51. Khi nim
6
Hinh 1: nha epoxyCc loi nha Epoxy:Nha Epoxy nn Bisphenol ANha Epoxy nn Bishhenol FNha Epoxy nn Novolac
71. Khi nimCng thc nha Epoxy nn Bisphenol A
81. Khi nim
Cng thc Nha Epoxy nn Bishhenol F
91. Khi nim
Cng thc Nha Epoxy nn Novolac
101. Khi nim
Epoxy Phenol Novolac (EPN)Cng thc Nha Epoxy nn Novolac
111. Khi nim
Epoxy Cresol Novolac (ECN)1. Tng hp trn nn Bisphenol A (diphenylol propan) Tng hp t phn ng gia Bisphenol A vi epichlorhydrin vi cht xc tc bazo.
122. Tng hp
2. Tng hp trn nn NovolacEpoxy Novolac l sn phm ca phn ng epichlohydrin v Novolac trong mi trng bazo
132. Tng hp
kt dnh rt cao bn c l caoChng mi mn rt tt bn ha hc rt cao co th tch rt thp trc v sau khi ng rnKh nng chu mt mi ttThi gian ng rn nhanh143. Tnh cht3.1 Cc thng s vt lMt vi tnh cht vt l chung v Epoxy khng c n
153. Tnh chtCc thng sGi trT trng1.2-1.3 cng Rockwell M100-110 bn ko, lb/in24-13000 gin di lc t, %3-5Module Young, lb/in22-5 x 105 bn va p0.3-0.9 dn nhit (cal cm-1 sec-1 oC)4-5 x 105Nhit phn hy3100 C 3500 C3.2 Phn ng ng rn EpoxyV epoxy l nha nhit do nn khng th t chuyn sang trng thi khng tan, khng nng chy. nha epoxy c nhiu tnh cht c l tt, ta phi thc hin phn ng ng rn nha ny bng cch chn cc cht ng rn ph hp.
163. Tnh chtVic la chn cht ng rn cho nha epoxy ph thuc vo: Tnh cht gia cng tt trong h cha ng rn nh: nht thp nhit gia cng, thi gian gel ( pot life), nhit lng ca phn ng v c hi.Thi gian v nhit ng rnNhng tnh cht (vt l, c hc, in v ha hc ) ca h ng rnGi thnh173. Tnh chtCht ng rn nha epoxy c th chia lm 3 nhm chnh:Cht ng rn loi amin: ng rn nhit thng Cht ng rn loi acid: ng rn nhit cao Cht ng rn loi khc: cc hp cht cha hai hay nhiu thnh phn nh chc nh phenol formandehyt,.
183. Tnh cht3.3. ng rn nhit thng: amin, amid Cc cht ng rn thng gp: DETA (dietyl triamin) hm lng 5-8%. TETA (trietyl tetraamin) hm lng 7-10%. PETA (polyethylene polyamid) hm lng 10-20%. Versamit 125, 135 hm lng 40-55%.
193. Tnh chtThi gian ng rn ph thuc vo nhit .Tc ng rn cng nhanh thi gian cng gim.Nu d amine, phn ng xy ra nhanh ta nhit lm phn hy amine, to bt l phn ng ta nhit
203. Tnh cht4.1 Keo dn
c im ni tri: kh nng chu mi mn, chu p lc cao khi ng cng.Thao tc d dng v x l nhanh cc s cC th sa cha cho rt nhiu loi vt liu: thp, nhm, ng, cao su, g, b tng.. bi kh nng kt dnh nhanh ca n.
214. ng dng224. ng dng
Hnh 2: keo dan
4.2 Sn Epoxy Sn Epoxy l loi sn tt, mi, c nhiu tnh nng qu. cng cao, chu bn ha hc nh sn phenolformaldehyd (P.F)Sn Epoxy chia lm ba loi : Sn Epoxy ng rn nguiSn epoxy loi esteSn epoxy ng rn nhit
234. ng dng244. ng dng
Hinh 3: Sn sn 671-X75 DER 671 ( dng rn)
Sn Epoxy ng rn ngui
Sn epoxy loi este
Sn epoxy ng rn nhit
c tnhC th kh nhit thng,chu nc, chu n mn ha hc tt, c bm chc tt
Khi dng khng cn cht ng rn no. bm chc tt , bn tt, c chu nc, v chu n mn ha hc nht nh
L loi sn ng rn c khi c cc loi nha khc phn ng tin hnh nhit caong dngDng sn b mt kim loi, g trong mi trng n mn ha hc, ngp nc, chu m t nh cc thit b c kh ha cht, my bay,Lp sn bo v cho cc nh my ha cht 254. ng dng4.3 Lm vt liu composite
Dng cho cc sn phm c yu cu tnh nng c l cao, ch to lp bc lt bo v thit b chng n mn ho cht, c th dng n vi si thy tinh, si basalt, v si carbon
264. ng dng274. ng dng
Hinh 4: san phm t epoxy composite
4.3.1 Epoxy Asphalt
L loi b tng polymer c hnh thnh bi cht kt dnh dng Epoxy phn tch chm trn vi ct liu ging nh b tng nha thng thng284. ng dngB tng nha Epoxy Asphalt l mt loi b tng polymer, c s dng lm mt ng trn bn mt cu vi bn rt cao
294. ng dng
Hinh 5: B tng nha Epoxy Asphalt Vic p dng loi vt liu ny cho thy hiu qu lm vic tuyt vi ca mt ng trn cu, trong c cu San Francisco-Oakland Bay.
304. ng dng
Hinh 6: Mt cu lam t b tng nha Epoxy Asphalt 4.3.2 WRAP SEAL L loi epoxy dng bng qun. Dng sa cha cc vt nt r r nc, kh, du, ha cht ca cc ng ng bnh hi mt cch an ton nht v nhanh chng nht.
314. ng dng
Hinh 7: wrap seal Cac loi epoxy nay c tui th khong 2 nm. V c th sa cha li.
324. ng dng
Hinh 8: Dung wrap seal sa cha ng ng dn 33Cm n c v cc bn lng nghe
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