Quaterinized hyperbranhced polyvinylbenzylchloride as crosslinker

Development of novel environment friendly self-crosslinker, which enables polymers crosslinking without thermal treatment, is highly desirable for several industrial scale applications such as paints and dyes. Herein, we reported a one-pot facile synthesis of hyperbranched polyvinylbenzylchloride (HBPVBC) followed by its quaterinization with pyridine. The resulting product (QHBPVBC) was then used as a crosslinker. Detailed characterization of the HBPVBC and QHBPVBC were conducted by nuclear magnetic resonance (1H NMR), Fourier transform infrared spectroscopy (FTIR) and thermo-gravimetric analysis (TGA). Four different quaterinized crosslinked membranes (QHPs) were prepared by changing the ratio of pyridine to HBPVBC, denoted as QHP-0.25, QHP-0.50, QHP-0.75 and QHP-1.0. Sol-Gel analysis and elemental analysis were used to evaluate the degree of crosslinking and quaterinization of all QHPs. Furthermore, crosslinking effectiveness of QHBPVBC was also demonstrated by introducing QHP-0.50 in sulfonated polyphenyloxide polymer (H+sPPO) structure and observing the mechanical and thermal properties. Initiator-free preparation of QHBPVBC and the self-crosslinking ability in pure aqueous medium at ambient temperature exhibited high effectiveness and environmental-friendly nature. All these outstanding properties facilitated the enhancement of thermal and mechanical properties of linear polymers, making QHBPVBC a potential crosslinker candidate for various industrial applications.