PRÁCTICA No. 2 ¡EL POLIESTIRENO Y SU SOLUBILIDAD! Objetivo. Observar e ee"to #e $% #isove%te &a"eto%a' sobre $% (o)*ero &(oiestire%o'. &(oiestire%o'. I%tro#$""i+%. La a"eto%a se $sa "o*o #isove%te #e ,rasas- a"eites- "eras- $es- (/sti"os- a"as 0 bar%i"es. Ta*bi1% se e*(ea e% a abri"a"i+% abri" a"i+% #e a,$%os e(osivos- (e)"$as oto,r/3"as- re*ove#ores re*ove#ores #e (i%t$ra 0 bar%i"es- a #esi#rata"i+% 0 e%#$re"i* ie%to #e teji#os4 a etra""i+% #e a,$%os (ro#$"tos ve,etaes 0 a%i*aes 0 "o*o *ateri a (ri*a e% $%a ,ra% varie#a# varie#a# #e s)%tesis #e a 5$)*i"a 5$)*i"a Or,/%i"a. Or,/%i"a. La es($*a #e (oiestire%o 0 a a"eto%a (ro#$"e% $%a rea""i+% i%teresa%te "$a%#o se as "o*bi%a%6 a es($*a #e (oiestire%o (are"e #esa(are"er #e%tro #e a a"eto%a. Esto e% reai#a# es $%a #iso$"i+%- 0 as *o1"$as #e a es($*a se e%tre*e7"a% "o% a a"eto%a. Esta #iso$"i+% 0 a so$"i+% res$ta%te *$estra% $% (ote%"ia (ara a te"%oo,)a #e re"i"a#o. Otras (erso%as est/% e0e%#o E(eri*e%to "o% a"eto%a 0 es($*a #e (oiestire%o Pro0e"to "ie%t)3"o #e i%vesti,a"i+% sobre a a"eto%a 0 es($*a #e (oiestire%o (oiestire%o Pro(ie#a#es Pro(ie#a#es #e a a"eto%a E "o*($esto or,/%i"o &C89'2CO- o a"eto%a- es $% ):$i#o tra%s;"i#o i%
a ta7a #e es($*a #e (oiestire%o e% $% *i%$to. L$e,o- (ro"$ra "$atro ta7as #e es($*a #e (oiestire%o #e *is*o
ta*a>o 0 "$atro re"i(ie%tes #e bo"a a%"a #e vi#rio #e *is*o ta*a>o. ?ierte varias "a%ti#a#es #e a"eto%a e% "a#a re"i(ie%te6 2@ *- 2 *- @ * 0 *. Rev$eve "o% $%a vara #e vi#rio. La es($*a #e (oiestire%o #ebe #isoverse #e%tro #e a a"eto%a e% #isti%tos *o*e%tos. So$bii#a# #e a es($*a #e (oiestire%o A verter a"eto%a sobre a es($*a #e (oiestire%o- a es($*a se #isover/. La es($*a #e (oiestire%o es so$be e% a"eto%a- (ero %o e% otros ):$i#os- "o*o (or eje*(o- e a,$a- Esto s$"e#e #ebi#o a as (ro(ie#a#es sove%tes #e a a"eto%a. La estr$"t$ra (orosa #e a es($*a #e (oiestire%o (er*ite :$e se #is$eva r/(i#a*e%te $% vo$*e% ,ra%#e e% $%a "a%ti#a# reativa*e%te (e:$e>a #e a"eto%a. I*(orta%"ia C$a%#o a es($*a #e (oiestire%o se #is$eve e% a a"eto%a- %o #esa(are"e. E% "a*bio- as *o1"$as #e (oiestire%o est/% (rese%tes e% a so$"i+% #e a"eto%a. La so$bii#a# #e a es($*a e% a a"eto%a es i*(orta%te (ara os 3%es #e re"i"a#o. La etra""i+% #e (oiestire%o #e a so$"i+% #e a"eto%a (er*ite a abri"a"i+% #e %$eva es($*a #e (oiestire%o 0 evita :$e a es($*a $tii7a#a i%,rese e% os terre%os #e ree%o. Desarroo E(eri*e%ta. =e#i#as #e se,$ri#a#. Utii7a t$ bata. =ateriaes. • • •
(ato o%#o #e (/sti"o o #e vi#rio vasos #e $%i"e ras"o "o% ta(a
Rea"tivos. •
A"eto%a i%#$stria &e :$itaes*ate %o $%"io%a'
Pro"e#i*ie%to. 8a7 e% t$ "$a#er%o $%a ista #e as (ro(ie#a#es )si"as #e a es($*a #e (oies tire%o a%tes 0 #es($1s #e s$*er,iro e% a a"eto%a 0 "o*(/raas.2 . Coo"a e% $% (ato a"eto%a asta $%a at$ra #e #os "e%t)*etros. 2. I%tro#$"e e% a a"eto%a os vasos #e $%i"e- $%o (or $%o- 0 observa o :$e s$"e#e. 9. Sa"a e (o)*ero #e (ato "o% t$s #e#os 0 o(r)*eo (ara :$itar e e"eso #e a"eto%a. . Re"$(era e #isove%te e% $% ras"o- t/(ao 0 ret)rao. @. =o#ea e (oiestire%o :$e obt$viste e% or*a #e "$bo o (eota. . Per*ite :$e a a"eto%a se eva(ore "o*(eta*e%te 0 observa a
C$estio%ario. . F5$1 e s$"e#i+ a os vasosG HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH 2. FC+*o o e(i"asG HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH 9. FLa a"eto%a #is$eve e (oiestire%o o s+o ro*(e a es($*aG HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH Reere%"ia6 Libro #e 5$)*i"a 9 #e ?i"e%te A$,$sto Taa%:$erA%a =art)%e7 ?/7:$e7 0 i%#a Ira7o:$e P.'
