Abstract:
The composite comprises (i) a reinforcement phase comprising fibres, this phase being in a volume percentage comprised from 25 to 70% with respect to the total volume of the composite, and (ii) a matrix phase which is in a volume percentage comprised from 30 to 75% with respect to the total volume of the composite, being the sum of volumes of both phases forming the composite 100%, and wherein the matrixphase comprises a cured epoxy resin in a percentage comprised from 50-100% by weight with respect to the total weight of the matrix phase, and the cured epoxy resin being obtainable by: (a) mixing an epoxide-functionalised resin with a functionality equal to or higher than 2 with a cross-linking agent of formula (I), and (b) curing the reaction mixture at a temperature comprised from 10 to 200 ºC, this step being performed in the absence of a catalyst. The composite is reprocessable, reparable and recyclableand shows mechanochromic behaviour, being useful in the manufacture of an article.
Abstract:
The present invention provides a Molybdenum or Tungsten chalcogenide nanoobject having: (a) an object size comprised from 0.1 to 500 nm, and (b) from 1 to 99% by weight of molecules of formula (I) with respect to the total weight of the nanoobject, wherein: A is -OH; X is selected from: (CrC2o)alkyl optionally substituted with one or more radicals; a 2 to 20-member heteroalkyi optionally substituted with one or more radicals; and a homopolymer or copolymer comprising a polymeric chain; B is selected from: H, -OH, NH2, (Ci-C4)alkyl, halogen, phenyl substituted with one or more halogen radicals, benzyl substituted with one or more halogen radicals, -C(=O)R3, -C(=O)(R7), -OC(=O)(O)R 3 , -C(=O)(O ), -C(=O)(O)R 3 , -OR 3 , -CH(OR 3 )(OR 4 ), -C(OR 3 )(OR 4 )(R 5 ), -C(OR 3 )(OR 4 )(OR 5 ), -C(OR 3 )(OR 4 )(OR 5 )( OR 6 ), -NR 1 ,-NR 2 R 3 ,, -C(=NR 1 )(R 2 ), -C(=O)(NR 1 R 2 ), -Ν(Ο(=Ο)(^)) (C(=O)(R 2 ))(R 3 ), -O(CN), -NC(=O), -ONO 2 , -CN, -NC, -ON(=O), -NO 2 , -NO, -C 5 H 4 N, -SR 1, -SSR 1,- S)(R 1 ), - S(R 1 ), -S(=O)(OH), -S(=O)(=O)(OH), -SCN, -NCS, -C(=S)(R 1 ), -PR 1 R 2 , -P(=O)(OH) 2 , -OP(=O)(OH) 2 , -OP(=O)(OR 1 )(OR2), -B(OH), -B(OR 1 )(OR 2 ), and -B(OR 1 )(R 2 ); provided that when B is -H or (C 1 -C 4 ) alkyl, then X is a homopolymer, a copolymer, or a 2 to 20-member heteroalkyl optionally substituted with one or more radicals as defined above. The present invention also provides processes for the preparation of the nanoobjects, their use as additive for reducing the friction coefficient of a material, and compositions comprising thereof. A-X-B (I)
Abstract:
The polymer comprises units of formula (I) and of formula (Ibis), being comprised the molar ratio between units (I) and (Ibis) comprised from 1.0:0.2 to 1.0:0.8, and wherein R 4 are independently selected from radicals of formula (II), (III), and (IV), R 1 and R 1' are independently selected from: -H, (C 1 -C 20 )alkyl, (C 5 -C 14 )aryl, -OR 5 , -(CO)R 6 , -O(CO)R 7 , -(SO)R 8 , -NH-CO-R 9 , - COOR 10 , -NR 11 R 12 , -NO 2 , and halogen; R 2 , R 2 ', R 3 , and R 3 ' are -H; P is a polymeric chain, R 5 to R 12 are independently selected: -H, (C 1 -C 20 )alkyl, and (C 5 -C 14 )aryl; R 13 and R 14 are independently selected from (C 1 -C 5 )alkyl, and (C 5 -C 14 )aryl;, m is from 3 to 4; n is from 1 to 2; and p is from 1 to 2 provided that n + m + p sums 6; the polymer comprising from 5 to 25 weight % of urea moieties, and having H-bonding and pi-pi staking interactions between the urea groups, and a tensile strength comprised from 3 to 15 MPa.
Abstract:
A self-healing elastomeric material comprising at least a) a crosslinked diorgano polysiloxane and b) a polymer or bitumen is described. Several procedures for the preparation of the self-healing elastomeric materials of the invention as well as uses thereof are also described.
Abstract:
La composición comprende: (a) un compuesto de fórmula (I), (b) una matriz polimérica que comprende un polímero reticulado, teniendo la matriz un valor de viscosidad comprendido desde 1 x 10 -3 hasta 1 x 10 12 Pa ·s, (c) un par rédox, y (d) un disolvente, estando el compuesto de fórmula (I) y el par rédox embebidos en la matriz polimérica; y en donde: R 1 y R 2 se seleccionan de: un alquilo (C 1 -C 20 ); alquilo (C 1 -C 20 ) sustituido; un heteroalquilo de 2 a 20 miembros; un heteroalquilo de 2 a 20 miembros sustituido; alquenilo (C 2 -C 20 ); alquenilo (C 2 -C 20 ) sustituido; alquinilo (C 2 -C 20 ); alquinilo (C 2 -C 20 ) sustituido; y un sistema de anillos conocido; los grupos R3 a R10 se seleccionan entre hidrógeno; alquilo (C 1 -C 20 ); alquilo (C 1 -C 20 ) sustituido; y nitro; y X es un anión de carga monovalente. La presente invención también se refiere a procedimientos para su preparación y a dispositivos que la comprenden. La composición multicrómica muestra un corto tiempo de conmutación y baja transmisión en el rango más visible, lo que la hace eficaz para bloquear toda la radiación visible en ventanas inteligentes.
Abstract:
The self-healing cross-linked polymer comprises units of formula (I), wherein: P is a polymeric chain, R 1 and R 1 ' are independently selected from the group consisting of: -H, (C 1 -C 20 )alkyl, (C 5 -C 14 )aryl, -OR 4 , -(CO)R 5 , -O(CO)R 6 , -(SO)R 7 , -NH-CO-R 8 , -COOR 9 , -NR 10 R 11 , -NO 2 , and halogen; R 2 , R 2 ', R 3 and R 3 ' are independently selected from the group consisting of: -H, (C 1 -C 20 )alkyl and (C 5 -C 14 )aryl; R 4 to R 11 are the same or different, and are selected from the group consisting of: -H, (C 1 -C 20 )alkyl, and (C 5 -C 14 )aryl; m is from 3 to 4;n is from 1 to 2; provided that n + m is 5; the polymer having H-bonding interactions and being able to undergo catalyst free aromatic disulfide metathesis at room-temperature, and having a tensile strength value from 0.5 to 1.5 MPa and an elongation at break value higher than 200% at room- temperature. (I)