Modu1ated temPelatule Dsc sfudies on th€ phase bansitions of Poly
Transkrypt
Modu1ated temPelatule Dsc sfudies on th€ phase bansitions of Poly
KRŻYszToFPlELlcHoWsKI' KINGAFLE]TUCII cncow UnivcBity olTchnology DePł ment ol clremisty aM Td'nolÓ8y of P.]vńeĄ !l. Wal.za1'\ka 21,3r r55 Krakóq Polind Modu1ated temPelatule Dsc sfudies on th€ phase bansitions of Poly(ethylene oxide). Effect of temPelature st€p ITAPID COMMUNICATION sumnary _ P]'mcbehaYiour ol poly(ł]'vlcne ox c) (PEox) wis inlesti_ galcd br nodulatcd t ńpdal!ę diffceniial Ńanning olo mety(Dsc) shp s.atr alr.rńłtin8 Dsc at diffelcnt bńPltafuĘ stcPs. Addłional lcatufts nponc s durinS phase ransitions ca| bc 5c3n.Ń5 dr. rcv*siblc comPoncni of th. mcłiĘ pL(,t\ \!as dcacasjns Thjs clfcd B duc to i shilt of ilre equilibriun *ato of ńcltin8_rcqśt 11iza_ iiotr PloreŚes łowards highli degF. of onvcBion tlmt hindcB molc't\{[iblc lat nk].alion atrd relr*alliŻati.n Analysis o' ihP nonjaeEible .omponenr dfi'rg $,*łllizatn ŚhÓ!v!d thł an lnocase in the sfuP .łJs.d a v.ry di$i'1Ćt ind.^sc i| thg ńon ĘreśibhomPorc sĘMl dre b a] han.R] .lyshlliŻłtjon of rhc lŚ def€lcd slru.fures }łi.h was laĆilitatcd by &y wolds: lolv(cihv lc| c oxid c), nodulłtcd tcD]Potłiut djffs.ŃEl scan' n|3 ciloinct'y, c'fNt ol tcmpcrJturc ścp,Phise baNitions, rcv.śjblc ałl Polv(ctl'v]d'c or c) (P!ox), aD . v*allnre themoPh*n F.lytu!, pii'ts, paPe! (D6n!s, dhlc hbI I ińPoti|t scni. irc uscd in w cr P.rkisrns nih'iils, solid clNrol irsiscntsrordn,gslr rl ALelativ.r),nN,appri.atioi, rrut c .ofndcred is a \.ry proh PĘoX as i thernDl .ntrgv nolagc hrgc h.it of ILEio| ind. Ól1llnt t'l] \l.śDf tlr.!! aFpli.iiiliR tquilcśabhfud rcPc _ ditioB' lluk!' ńckńrg i|d avśJllizaliol ol PEox ics 15 il. D6piturl ilg d'e nihnc ofPhisc hłnsiiions .ELtnuy bc iIa new r!.hnq!c frodulatcd tlmFsaturc drf'ci.hcd lcrcf tiar s.anning carorindry (MT Dsc) 17] m thc *cF ssn alrcnatiĘ (ssA Dsc) mod. n iP' t,lrcd I'r rrris nrthod, th! r*ir hc b.ing thc drFe ofihe hcii fro\Y hold t.npĆrafurc PrqriE Th. totil h.at flow on b. scPanbd to drc lcvcEńl. ind non{evłsibl..omPo thłt t]nc is no M.e$ y b lsc r{uig t rs'ornr.tion rcvcEiblc .onp. neńi $ ca lcu litcd dilcdly from thc Q|o mctic data (isothcrnil scgncnts) ł|d phasc la8 The ailr of this wolk iŚ b inv*rigatĆ th. pha\e lr!_ havn,u! ol p.ly(cthvleń! dxjdc) un P.lt(erhylene oxidĆ) (PEox) (ńolE l''5 P'odu.cd by PolysĆicńc.s c Th.rm3l urvcsti!łiions w.r. P. powcr.ońP.nsłtcLl PerkiFEl'ner,,PyriŚ Diłmond Dsc"' FiĘL srmp]e was heated abÓ perafo t.ara hcrłin3 rate ol10 K/nin, hdld rdthernauy for 3 m'n ańd lhcn.mlcd b 3l't.t a Mling r.h o1 ]0 X/ńin ssA'Ec m€sulmeń K/nin, di1ferd! slcP) llgc done i. ĆlGld .lum'num p ts lvith sańPlc ńłśof 3 n3 und.r łĘon now ol 20.N'/min' P'ior b U* ih. cłlor R.sulb of arion rewEibl. ptus mnveŚion d'i! hindffi bNlttls higlw dcEiN or nolNhr N.l€tjÓn An oppGit cfi.d ..n be obscFcd omponenrdurin! m.rrins (Fis. 3) h 'nd t ńon l$,c4'ble a hGi norv n.asufm.nrs dilfcrcnt sleps a.c ptcśĆńtcd in Fig. ]. ?l fi( 3 ssn Dsc rEox nrfint ',1 ał. 55,a.D5c F'lilśofil * lmnśllinn ń tLox d ' !x|s:1 _o'25 k{.2 0'5'Ę,3 _ ].'.Ś n fuł "l k' 4 xox trtEnł. .o ] r dłftfut *F n u t^ {.lln$ 'lN ',ń'ikś '' r emPrfóblc slcP is inm$in8' dk nunbcr or L]. nllidllv dńt Pc€s dEt arc nd}6.Ąiblc, is nL{' in.r!.sins. Non-rcv.Bible comp.ncnr of rhr Plo\ hclńnB puN dKib€ś ffplclc Phi* hi6'h'ń Ur ho.rl studurc. rphcrulihs. l! rhc lan.llae, polym$ dr ns .rc cirlrri ]vkf! inlotmalion .iń bc ohla&\l ia spłntion o' m' vc*iblc and nonłcvĆhiblc .ońPo|clb k iPPlrcd by . Ś. Gcilhhn8 Plolilc śuperimpos.d to lhć norma] h]c!r Iullycxtend.d orloldcd, a smJllnuDlblr rimcs Mpsnturc slopc d!.in8 a Dsc cxpcim.nr The .rlsbllialioń bchav'ou. ol P By incrcasin! lh. knpcalurc slcP b.hge.ń śuh' aated b'v.Ppl!'ińB tolń ArT.ni ł s.<l!cnl idtremll ŚlBnoĘ lhc Bńiblc MPoncńt ńM thdj6' Tnoc is $nc urcc of |he meltnB pm.ś k d.@śins _ lhk clad iŚ d!! lizanon tegińo sine a ch.n8c in norPholoEy kly il b i shifi df thr q!ilibń!m śżto' nrcltiĘ_rc.r*illi lo8raPhic oricnl i.'n df $e 8rÓwlh fbno ńiv ov$li| lhc ouEc ol Bvsśiblca.d n n'lcvssiL' c .onPoncn ot PEOX cry*,Iiarion,c pt*ŃRt rFi* rrn,l5 I r^k |IofiIB of ltńiu..rflp14n rl di|ll!ł ł.F n tnb.t rl ąló 's lh. nl rttr riN.,!. SS^'Dsc wfttE ol |,Eox d!'łrniali l dt diftdł :l4lś.nł'!rś '.rfu\ 'ś fo o incRsin8 th.t.nPc.iiulc *cP b.Ń.ol turc progi?m wo Gn dlaw rhc _ By łqncnt is. rhem i l scgnen .ft}. mclń|E plo.cs was ts, the re]€F sur) iblr con pon! n t 'l!deasi]8 of mclhn8_r.dy*allization rcvcrolL,lc Pro.eŚes to wards hiSher dcsrcc of convcBion rhai hirdeis moledl F( 5' ss,Ą PEoX Dsc prdilA d mtr fułśaŻlry"rr, ł 1lr ł!'hllijlirn l, lktdł łlps i ł'rs ol dłlśtr r.vcśitlc comłomnt silMls .hłndcr lvhi.h was aho nrlfi] fol odl.r FolyncĘ n 0l Morc i,rforfation rn b. tuund jfanarr6is ofrhcnon{e Tlrc \ tśiblc.ompo|c|t E po1onncd' An inftełse ilr Pon.nr sjgN] lhe łcP onc.in cxPlłi'r pr urform rcmpcrahm filrLr Io]nd b atomiĆ fot.r mi.n".oPv (AF[o ard sENl i'} vstj8ihons lol jsorłdiĆ polyPfup hrcs rns rhc rcsuu of t]rc comp.tilnń of landlic b fll] thc spa.c dltin8 gro\th at thg t!ńPclatur. gEdic|t n]l non ń lal nuĆIĆation.nd relyśall'atiÓn A na lysn ol ilre m njeveĘible .ompo ncn t dun ng sysillizatior sho*cd thar in in.rcasc ir tne .p .auscd i lery dśtinct jnocisc i .omPoncnr signar du. to cfh r(d lcs.dcfe.fud śb.furcs whi.h lvas fłcilitatą] bv |atg& M.dulatcdicnPcthtrcDscyield jo| (iI comparkon with dłssi.a| Dsc) lcy J]' F' E KÓlesk.l' Y: ,,Po ' Ż cni]J D o' N': Tbi ł' Pńrichsski K,Ilgtuch ' Pic]ichowsh 6. chcry s abour (, urł'l i'' E.jtu.h 1995, ( Poł (: /' /]ł1 |i//' s.j (f 7 Pńji& 9' Wu L, LisoNskiM.' TalibuddĘ s, 3' s ag, B9 z. D., chei l., r icboror vsh x', aqfu.r) K rdol M'' Bailey N. A, s.h.iilnbq b Phłsc bclrłlioUr of poly(ldlllcnc oxidd as łllo$'hc scPamtc ihe r.leĘiblĆ iid ion !cvc6]bh .omPonenb oI thc (tÓbl) l'cat on rhc hTis oI Frfonned ncas 'lov l' B Pa*bk ^ , R', M chapol : r''rł Mł 1002' ł7, 7e Ru J 'hoo hd v. vJr H.mcjńj.k A ; T/Łt J P', Piólko*lta E': / ^Pl h