Experimental Analysis of Physical/Mechanical Behavior of Transparent Nanocomposite Coats made of Polyurethane/Alumina Nanoparticles

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1 269 26! /5$) ')2 /,. /)*( '( &$ %$ , >? :5< < ; : : 5 /N, /., 789,56. E I8J E :5H :G 8 G N <, <S@ R :5E Q 5<, >&? <:; > 7 &&( D 5C B& E :5EF :5< BCD A /N. P :O E E \. (FESEM) YZ < X Q < <J W. U? (DMTA)?C :`,, 7D ^G_ ]P <N H 2 E H <N, 5EF 5EF <S@ R < i <J /N C AcS5. 5, b R 9 KOa W <N E H.W EF.. P gh D A :5^8f 8 e@ : *d?u ] 7D S I8 /< k, ]a < :l` AcS5. j 5 :O b. G /N.5 S,W <N < 8 :> >GF. Experimental Analysis of Physical/Mechanical Behavior of Transparent Nanocomposite Coats made of Polyurethane/Alumina Nanoparticles H. Aliakbari Solids Design Group, Shahid Rajaee Teacher Training University, Tehran, Iran F. Ashenai Ghasemi Solids Design Group, Shahid Rajaee Teacher Training University, Tehran, Iran B. Ramezanzadeh Surface Coatings and Technology Group, Institute for Color Science and Technology, Tehran, Iran Abstract: In this study, physical/mechanical properties of transparent nanocomposite coats based on polyurethane with different weight fractions of alumina nanoparticles was studied. Physical/mechanical properties was studying employing impact, bending, tensile tests and dynamic mechanical thermal analysis (DMTA). The state of nanoparticles spreading in coats was studied using of a field emission scanning electron microscopy (FESEM). It was observed that by increasing nanoparticles up to 2 wt. % tensile strength and energy at break point and up to wt. % cross bond density and storage modulus of the coats improves. It was also seen that impact and bending strength of nanocomposites didn t decrease because of good flexibility of polyurethane in low weight fractions. Improving physical/mechanical properties of nanocomposites was related to the good spreading of nanoparticles in coats and their high modulus. Nanoparticels could also dissipate the exerted energy in interface of coat/nanoparticles and improve the strength of the samples. Keywords: Polyurethane, Alumina Nanoparticles, Physical/Mechanical Behavior, Thermal Behavior. 2] 7r U :5 I8J q N.[ E S) /W E E :@ ] ad A vrg >? N ( ^ m8j :5 E.S r : : S8 :5< S5 5 k@ 5e H@ A v..,j. 5 m E K9. A Q < 7 :5 ^ I8J b J 8 P m 5 KU 5 5 O 8S E 9 N ] 8. C < C A : : *d?u : Y m <mn U < : bg A. P m I8J oh. A C G : ^ mur S p_h Q. : )_ * f.a.ghasemi@srttu.edu : 95/2/ :! 95//2 :) *!

2 N. 5 /N. _9 _ p_h (NanoCr 2 O ) 7 7D. < :P k, ]a r <J, BCD.[ 9 ] < CW,, D? p_h (NanoFe 2 O ) A5 J. B Y E <..[],, 7D :, bc : <N < A E m, BCD :O b ] KN 8 p_h i <J N :P KOa r J CW b N :l` <N 8 < ] BCD \.[] 5, < /N N A5 :DmH : :` q E. * gh,, 7D. _ D? p_h S5.[2] :l` D? p_h, KCCD \ :5< N : 8 CW b gh [] [] A_//8 N S R 9 KOa W N :, bc : I8J 8 :Y.,J.. ]P Y S >? ] : S8 < i <J KH 9 <. O b 7D N O ad /N :56 : L E. E m. : /N. d5 D? p_h :. 5@ P BCD A 8 < A, KCCD 8 < A E m BCD A \ ^?C A E P ) D? p_h g BCD A. 8 dm < /N G (7 E Q <J. 5@ P U? G <, E Q FESEM O E. 5@ P U? DMTA E Q G >D7. D2 St2 D 2 E :O :5DmH m N8 H9 H i...mh. b 2 C (UV) <mn e* J CW ]P E :N8 i bx :. 5 < 7. i : S8 :5< 8 :5 5<. <@ R :` E : 5 /S, E :E [].S ]G UH S89 I8J :5H 9 K_, E 2 b S5 :W h ASR 5.@ k@ / 8 :5EF zg? EF :5S G : <N O, 8 :5O N <N g{ :, <N 5S G : A g k@ <J N g 25 b k.[5] <N /N 8 < k@?c <,, C. BCD A \.@ 7 H G i H H ], AcS5 k@ :5O Q : S8 :5 re ] 8 KOa ] :5 A `5 b S5 ;W.[6] Q k@ 7 E. : O 8 :5EF 26,, C, 8S : S,W <N }@ S8 8 EF 5 g,56 27 b <S5 ; ` D? p_h.[7] :5, < k?h E.@ 8 :5< : p_h C EF < _9. < C A O k?h i R A O < k?h S9 9 K g 5 A N TDI p_h < 9 <N k?h i R, \. P U?. 9 TDI < <5,.[8] < R A. : 2 N D MS }J, S5 E z Q 7r BCD ]P. : S8 :5< Toughness 2 Stiffness Choi Cheng 5 Song Field EmissionScanning Electron Microscope Dynamic Mechanical Thermal Analysis N... dm < /N r ]8D 262

3 E z 7. SP: E : 89 AG bs9 5 JR :, :N8 KDmH : : l CP K 5S. E :, KDmH. J E P e ]@ QD : DmH >? E. < v8 AU E K *. /,@ QD : :, MIRA TESCAN b FESEM G57 >F6( E. m : S8 E oe W E H 2 :G 8 < :5S, Q 5 R 9 o?c F o ` E D I8J :5SN. :5 _Y E. P E BYK6 :r 7 BYK E 2 b 2 KaJ, N /8 AE E <56 A.. S K N 8 J ]9 E 9 AE k E : m /8 AE. m Desmodur N75 N J ]9 N /5 ]5 9 %6 H. H 6/5 KN 89 H 75 H : $) >GK)2 22 E H 2 I8J :5^8f O NS5 D j8j N /8 AE p_h BCD A m r E. P AE 5 <J b_g <J < E D? E. * KH (CP 5) O NS5. E <5 : % 6 AE H r Q <J F. BP A2 b_g /8 AE. 7r QD : 9 / K NS5 /8 AE j8j N J ]9.. N (J ]9) (AE) E St2 DN( D D &!!D O&$ M. Fe C Si Mn P S Al &!.!D 99 / / 8 / / 2 / 5 / 5 / NANOBYK6 > 67 8PQR 2 M. D 9 &( &T D (%) 89 >' (%) MS; 89 D5 (nm) NANO BYK 6 D? p_h Polysiloxane 7 Methoxy Propylacetate 2 >*( >G >D7 2 o S 5 5 U St2 E :O :5DmH I8J :5S Q F. b_g E F KDmH AcS5. b_g Q < v8 :E 2 8 / JR 8 6 :5S. m >? E W. 8 2 JR 5 5 U :, Q 5<.. E W NS Morphology 26

4 QD :. E A 7r &U JR < :5 S : N 5 5 )D * (DMTA) S 2/ S / :. E b d_ 6 K E A A cs5. 7r GN o 5 Z :5. K L i 7 9 K L P : E E K L. W 8 U A. K H 7r EF C : U 5 S : K USr. E 2 b `* : E. 7 r ASTM D522 8 :5 E F 8 N : * GA <. / 5 E I8 J 5< /,@ JR R E., E. D v 8 \,, 7 D : E. <, E E m 5 S b : <5 ; b E 5 <, \ *. A cs5.,r 5 C (\) & & *G5 (\) & & *G ([6): ) S :?P Elcometer,. 7r \ R R E Q < : S : a < o?c < CW : : 7 r I8 J S N &U 5 7 Z) ' 2 K H \ FESEM I8 J : 5 S K L E. 7 r ƒ q m 5< : * d?u N <5 6 A. Z) ' 5, E, L 5 7 b G <J, ] 5 E. ) N FESEM 5 7 Z) ' Q i G <, Y R ^ A : O K DmH : 8 :5 E F 2 E 5 ASTM D279 : * : E. JR 5 S E / 5: 8 < E A S. 7r JR E : 5v8 : E Q T&C E \ D K H 8 /,@,E : U E v8 :N8 : 5 DmH : N. 7r (DMTA) $ &; r ] 8D / : d m < E v8... 5< ^ m 5< 9 STM5 b E : * ) N \ A E,, (SANTAM) 7 r E. ej. by<n 5: E S 5< E / 5 : E S A P 8 A 9 2 U E A E ]H G 7r.W ([6) ! D 2 >. ; 82 ]^J _^ FEFESEM &). P$ % 26

5 E z 7. SP: E : 89 AG >&)c/^b 57 :5^8f }@ < :5S ] E A.5, E I8J. 2 b \ 7r 7 KD ['Q >G D,L 57 >GDD M. &' &^@ M,L ASTM D522 D' a^ 57 ', 5, k, 5, k 5, k, 5, k >&e % Alumina 2% Alumina % Alumina [)D k E : g ƒ5 5, ] E YS5 i : *d?u U A <S@ ]D 89. S P gh D A :5^8f E P ] E A k 5, 79 E : :5E *. 5k. P m 5< 2 7 KD ['Q >G >& &U 57 >GDD 2 M. Z 57 ' 7lb.in > 7lb.in > 7lb.in> 7lb.in>.ASTM D279 D' a^ % Alumina 2% Alumina % Alumina < C R 9 KOa W ] [)D 2 <N bg A.5 <5 o ] : : gh R 8 < i /O.5 ] Z A 5 5< I8J :5^8f }@ < :5] 2 ].5, P R E U E, 5, k E : g ƒ5 2 ] :5S BP E 5< S5 e@ R C 5, g : ) R E.S 5< /N (\) ([6) (D) % Alumina (D) %2 Alumina (f) % Alumina(\) g6l ([6) 2 % (f) (D) (f) (\) ([6) 265 % Alumina (D) %2 Alumina (f) % Alumina(\) g6l ([6) %

6 ,, 7D (MPa) ['Q!D O:; & RR B' 8&i$ 5 % 2 (%) E H 67 K)2 /)*( 8 < AcS5 hl ) 5$)/ 67 P U? <, E Q C I8J :5S S9 : ]C r K Z.., ] <N 5, ] : 7r :5 : ]C r K Z H 2 E H H E H <N <N S9 S9 : r K Z. r <5 f b,, 7D Z 8S E m8j dm < /N r ]8D ; b (Pa) ['Q >G!D O:; & j) M. 8&i$ 6 % 2 (%) E H 67 (N) 5 2 % alumina %2 alumina 2 (mm) r ['Q >G!D D ) O:;& 6 >.& % 67 89?C by E (%) (%) E H >G!D O:; & K: ^J D Mk D)D 8&i$ 7 % ['Q r b <N i E osr A AcS5.?C by A : *d?u <5 9 <C?C by <N b <5 : 8 :5 re )NZ <N : E E H b <N. R 9 KOa W <5 :O b ] E I8J E :5H N gh 6 5 :5].5, 8 E b,, 7D /,, 7D H <N 5 ] ^8f, <N U G A E <N :G 5, AcS5. <5 7D by E H <5 b E H <N. <N 7 ]?C 6 >? N,, 7D <N <N r AE <S5 <N i E %2 E m. >R. EF?C by E E %2 ^8f b <5 ] 6 ]?C by <N r : *d?u <N E %2 E O ^8f <N. 5, C ]S9 : S8 SG osr ].[6] <5 EF 266

7 E z 7. SP: E : 89 AG 2 () U BY 5EF R 9 KOa W C :[8] D ˊ b A S 5, i T ˊ E g R A _9. O dh b (Pa). b, ['Q >GD D &L9 M. 8&i$ 9 % ['Q. >G!D D K)J$ 5$) 8 < : N g :5b K Z. P U?, ] C :5EF : d_ / 9 5 b ]. 2 E :5H C :5S.8 E E pu pu%alom ina pu%2alom ina (). :?C :` C. 9 < b.s 5, 8 ] AU EF :` (J) >G!D K)2 K: ^J D >F& 8&i$ 8 % zg ['Q < :` 8 ] B? E E H 2 :` <N. <N N < 7D AcS5. ]P 2 < 7D :` <N. <N.., E :5H E E H < E ٠ ١ ٢ ۴ (%) E H IUR / k, ]a Y S r < < N S BY?C N S : S9 : < bs9 75 < N S E d a < :5k, ]a. ]S9 : 8 k r < E H@?C H C :5EF :` <5 W i <J i AS E. < 267 Tan δ :, ['Q >GD D Tan δ 8&i$ %.['Q >G>ce D K)J$ 2 CrossLinking Density Rubbery platue zone () $&; )D *67 Z)' :5H :G 8 < G 5 (DMTA) P DMTA E Q E I8J C A < ad vf. : S G : E 5 S8 C U G :, G C S8 U S R b K Z.[7] <N. ]P N Dynamic Mechanical Thermal Analysis., 9 ] EF :

8 ['Q >')2 DMTA 57 7 KD ['Q >G&' &)DJ5M. Tg () U& 8NP$ 6lE (mol/cm ) ( C) /S$ > /S$ m $ 76 / 7 9 / / 9 % Alumina 8 / 8 / / 75 %2 Alumina 78 / 8 / 9 / / 967 % Alumina 77 / 8 / 8 6 / 5 / dm < /N r ]8D C :5S R 9 KOa W <N O KDR BY W <N 2 E :5H T g <5 A. S. < S R 9 KOa 2 E :5H C :5EF 5< J : <5 / W <N i AS :G 8 <.. >&e'5 :5EF BCD A E I8J E :5H. P :O E : 5 /N R :5E 5< /N : 7r (DMTA) G N <, <S@ < X Q < <J., \. P U? (FESEM) YZ KOa <N 8 < N g Z EF C :O b N : R 9 A ^8f bg A.5 <5 R o ] EF : *d?u R C : gh ] Z A 5EF. i : *d?u U A 5, FESEM E E a gh. EF i 5, EF : <5 8 < E H 2 N CW <N ] : *d?u ] E m 2 <N /O b.?c by < 8 EF :`. <N E H 2 < 7D <N E E H 2, DMTA E \ :5 re N KOUm ]U ]. }J, 5EF \ A <N N R 9 KOa W H <N ]U o ^ <N d Y E 8 : S8 <N r O H@ mg :5 re A S8 : *. EF :, b ]P <N 9 ] 6 : D ] Y E. 5, i H <N 5, 8 5 T g : E ]P b <N A : S8 E e@ ]U 5, ^ 9 ] AcS5. D b(pa) 5 < A ]U $ 6 D. D D O:;& &L9 M. 8&i$ D % K)J$ :, 5 H@ mg S8 : * o 8 C. 2.5E9 2E9.5E9 E () T g % Alumina 2% Alumina : D :O G e@ O C :5< S R 9 ba W UP. E ASJ ()? B Y E S 5 S8 R 9 KOa W : E :? A W. I U zg

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