High Tg and thermostable phytic Acid−Cured polynorbornene-based polymer by a Palladium(Ⅱ) complex bearing iminophenyl oxazolinylphenylamines ligand. (20th May 2019)

• Record Type: Journal Article
• Authors: He, Jianyun; Huang, Lingyun; Yang, Yinxin; Qi, Yanlong; Cui, Long; Dai, Quanquan; Bai, Chenxi
• Is Part Of: Polymer. Volume 172(2019)
• Page Start: 196
• Page End: 204
• Publication Date: 2019-05-20
• Subjects: High Tg and thermostability -- Phytic acid -- Polynorbornene; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2019.03.062
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: Fabrication of thermosets with high glass transition temperature ( T g ) has been a challenge in recent years. In this study, a facile method is presented to prepare high T g polymers with good thermostability. Firstly a chiral palladium (II) complex bearing an iminophenyl oxazolinylphenylamine (IPOPA) ligand, IPOPA-PdCl, has been prepared and characterized, which exhibits high activities for vinyl-(co)polymerization of norbornene (NB) and 5-vinyl-2-norbornene (VNB) in the presence of various cocatalysts. Then the synthesized copolymer P(NB-vinylNB) is epoxidized to generate epoxy product P(NB-epoxyNB). Phytic acid (PA), which is a naturally component in plants, is then used to cross-link P(NB-epoxyNB) for further restricting molecular motions. The obtained crosslinked P(NB-epoxyNB)-PA exhibits high T g of up to 351.5 °C. This work not only provides insight into the design of novel semi-salen type palladium (II)-based catalyst for vinyl-(co)polymerization of NB and its derivative, but also shows a feasible strategy to design thermosetting PNB-based polymer with high T g and thermostability. Graphical abstract: Image 1 Highlights: High T g and thermostable PNB-based polymer. Facile route to fabricate the novel thermosetting polymer. Novel iminophenyl oxazolinylphenylamines palladium chloride complex and its structure. Vinyl-copolymerization of norbornene and 5-vinyl-2-norbornene by the synthesized Pd catalyst.