Relationship between Architecture and Adhesive Properties of Macromolecular Materials, 1

Abstract

This study deals with the preparation of polyurethane‐graft‐poly(n‐butyl acrylate)s copolymers by polymerization of diphenyl‐methane‐4,4‐di‐isocyanate (MDI) with α,α′‐di‐hydroxyl‐poly(n‐butyl acrylate)s of different sizes as macromonomers. The polyaddition has been studied on the basis of kinetic measurements, and the comb‐like structure of the resulting polymer has been well‐established. Such grafted copolymers display specific adhesive properties in connection with their comb‐like architecture.magnified image

Preparation and characterization of novel transparent Eu(AA)3‐polyurethane acrylate copolymeric materials

“…The macromonomers of polyurethane acrylate made up of C¼ ¼CA terminal groups of acrylate and polyurethane segments are functionality polymerizable intermediates and have attracted significant interest in basic research and application. [22][23][24][25] It will be a new approach to prepare novel RE polymers utilizing the polymerization activity of macromonomers of polyurethane acrylate and Eu(AA) 3 salts. Recently, RE functional materials obtained by adding RE compounds to the polyurethane matrixes have been reported.…”

Synthesis and characterization of novel organosilicon‐modified polyurethane

“…The bands arising from COC in the polyester at 1155, 1193, and 1432 cm −1 also appear. Furthermore, the ATR‐IR spectrum of the isocyanate does not show the band at 2250 cm −1 (related to free NCO) thereby confirming that the polyurethane is fully reacted 1, 2, 4, 17, 18. The PDMS‐modified TPU shows a relatively similar ATR‐IR spectrum than that of prepolymer, although some differences in the 700−1000 cm −1 range can be noticed.…”

“…The structure of the prepolymer was verified by FTIR spectroscopy as shown in Figure 2. The absorption bands around 1722 cm −1 (CO of urethane) and 1000−1200 cm −1 (COC stretching) are obtained 1, 2, 4, 17, 18. It is also noteworthy that the ATR‐IR spectrum of the TPU prepolymer shows a high intensity of NCO band at 2244 cm −1 , confirming that the prepolymers contains unreacted isocyanate ends.…”

“…The TPU was prepared using the prepolymer method 17. TDI and polyester polyols were added to a four‐neck round‐bottom flask (30 mL ethyl acetate) containing a mechanical stirrer and placed in a water bath to obtain the prepolymer.…”

Relationship Between Architecture and Adhesion in Polyurethane‐Based Copolymers, 2

“…In a first attempt to correlate the architecture and adhesive properties of polyurethane‐based materials, the synthesis and behavior of new comb‐like polyurethane‐ graft ‐poly(butyl acrylate)s (PUR‐ graft ‐PBA) were discussed in a previous publication 10. The adhesion properties of such materials were promising, but lacked cohesiveness, which may compromise their use without additives.…”