@article {19864, title = {Effect of two different RAFT reactions on grafting MMA from pre-irradiated PP film}, journal = {Radiation Physics and Chemistry}, volume = {159}, year = {2019}, month = {2019-02-28 00:00:00}, pages = {222-230}, publisher = {Elsevier}, abstract = {

The graft polymerization of methyl methacrylate (MMA) from pre-irradiated polypropylene (PP) films mediated by two different addition-fragmentation chain transfer (RAFT) polymerization mechanisms{\textemdash}surface-initiated RAFT polymerization and interface-mediated RAFT polymerization was studied. In the first mechanism, electron beam irradiation technique was applied to produce the initial radical active sites and peroxides on PP films. 4-cyanopentanoic acid dithiobenzoate (CPADB) was added in the solution to mediate the graft polymerization. In the second mechanism, a new technique utilizing the decomposition and recombination of peroxides produced by electron beam and di(thiobenzoyl) disulfide (DBDS) to anchor CTA on PP films was applied. GPC, ATR-FTIR, XPS, SEM and water contact angle were used to characterize graft layer. Surface-initiated RAFT polymerization was found to be fast and facile with high degree of grafting (Dg) and large number-average molecular weight. But the samples after reaction were swelling and out of shape. Interface-mediated RAFT polymerization led to rather low Dg and low molecular weight. But the samples kept their pristine shapes and had better surface properties.

}, keywords = {Electron beam, PP film, Pre-irradiation, RAFT polymerization, Swelling}, issn = {0969-806X}, doi = {10.1016/j.radphyschem.2019.02.046}, url = {https://reader.elsevier.com/reader/sd/pii/S0969806X18305577?token=70B97C7539F3CBB1F9DD39761083C11EAAFC10A80D8759C7D269E944EF5A814965D18E5F5384D88D308D6C17D636036B}, author = {Gao, Y. and Chen, Y. and Yang, L. and Rodrigues, L.C. and Reis, R. L. and Chen, J.}, editor = {Chantler, C. and LaVerne, J. and Ula{\'n}ski, P.} }