Pan, Zhaoqun; Huang, Bingsheng; Zhu, Liqiang; Zeng, Kelin published the artcile< Synthesis of siloxane oligomers containing boron and epoxy groups for promoting the adhesion of addition-curable silicone rubber to PPA and copper plate>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is siloxane oligomer adhesion silicone rubber polyphthalamide copper plate.
The addition-curable silicone rubber (ASR) is a packaging material widely applied in the LED encapsulation. However, due to low surface energy, the silicone rubber has the poor adhesion to different substrates, such as copper and PPA. In this study, three silicone adhesion promoters, EBSiO, ESiO and BSiO were synthesized via non-hydrolytic dealcoholization reaction. The mol. structure of adhesion promoters was confirmed by IR spectroscopy and gel permeation chromatog. The influences of three adhesion promoters on the adhesion performance of ASR were explored by shear strength tests. In addition, the transmittance of cured ASR with different additions of adhesion promoters was measured. The measurement results showed that the adhesion of cured ASR to metal copper and poly-phthalamide (PPA) was enormously enhanced by EBSiO in silicone rubber. After 1.0 phr EBSiO was added into silicone rubber, the adhesion strength between the obtained ASR and two materials (copper plate and PPA) resp. reached 3.163 MPa and 1.691 MPa, whereas the adhesion strength between the pristine ASR and two materials were resp. only 0.643 MPa and 0.474 MPa. The adhesion mechanism of cured ASR to PPA and copper was investigated. SEM images of the damaged interface between silicone rubber and substrates further proved that boron atoms and epoxy groups played an important role in enhancing the bonding performance of ASR to copper and PPA.
Journal of Adhesion Science and Technology published new progress about Adhesion, physical. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics