Polyborosiloxane gel (PBS-gel) with shear hardening properties was prepared by cross-linking boric acid and hydroxyl-terminated polydimethylsiloxane through B-O-Si dynamic covalent bonding. The PBS mixed methyl vinyl silicone rubber (MVQ), a benzoyl peroxide (BPO) agent added to vulcanize the rubber. At same time, molecules were co-vulcanizing MVQ produce molecular cross-linking. effects of PBS-gel on damping analyzed rheological test, Fourier transform infrared spectroscopy mechanical...

Long glass fiber-reinforced polypropylene was prepared with the self-designed impregnation device. Main properties (like mechanical properties), average fiber length, orientation, and morphology of LFPP three different compatibilizers including octane—ethylene copolymer, maleic anhydride grafted copolymer. Maleic were investigated on injection molding bars. Results showed that addition POE led to decrease in tensile strength. PP-g-MAH POE-g-MAH improved adhesion between polypropylene. These...

The influences of the glass fiber content and initial length on mechanical properties long reinforced nylon 66 (LGF-PA66) were investigated, then appropriate (30%) (10 mm) determined to study effect three kinds compatibilizers (maleic anhydride grafted polypropylene (PP-g-MAH), maleic polyolefin elastomer (POE-g-MAH) ethylene propylene diene monomer (EPDM-g-MAH)) LGF-PA66 composites. It is found that a maximum tensile strength reached for composites when any different are 2.5 wt%. However,...

ABSTRACT Polyborosiloxane (PBS) was synthesized from boric acid and hydroxyl‐terminated polydimethylsiloxane (PDMS). The oscillatory shear behavior of PBS formed by PDMS with different molecular weight studied. relaxation time calculated Doi‐Edwards model. Finally, the shear‐stiffening mechanism reversibly crosslinked entangled polymer obtained. Shear stiffening occurs at lower frequencies, which is mainly due to crosslinking bonds friction between molecules hindering movement molecules....

Abstract A growing variety of composites utilize natural plant fibers with naturally occurring veins structured hierarchically in an effort to reduce dependence on petroleum‐based materials. In this article, ramie were extracted by alkaline delignification. Then, and PP matrix, prepared filament form amino‐silane coupling agent KH550, maleic anhydride grafted polypropylene added improve interfacial compatibility. Ramie fiber/polypropylene fiber‐reinforced polymer (FRC) hot pressing after...

Abstract Poly(vinyl alcohol)/nano‐silica (PVA/nano‐SiO 2 ) films were prepared through extrusion blowing with the addition of water and glycerin as plasticizer. The characteristic properties PVA/nano‐SiO investigated by differential scanning calorimetry, dynamic mechanical analysis, Haake torque rheometry, atomic force microscopy (AFM). results showed that improved dramatically. tensile strength nanofilms increased from 62 MPa to 104 loading 0.3 wt % nano‐SiO tear was 222 KN/m 580 KN/m....

At present, the thickener market is relatively advanced. Only by imparting thickeners with new properties can they meet needs of current market. In this work, a modified tackifying dispersant poly (vinyl alcohol-acrylic acid-triallyl cyanate) (PVA-AA-t) was prepared via alcoholysis random copolymer composed vinyl acetate (VAc), acrylic acid (AA), and triallyl cyanate (TAC) one-step high-temperature solution polymerization in methanol, which simple method. The structure polymer characterized...

Abstract In this article, a terpolymer of ethylene, maleic anhydride, and glycidyl methacrylate (EMG) was used to enhance the compatibilization between poly(phenylene sulfide) (PPS) polyamide‐66 (PA66). The mechanical properties, morphology, crystalline melting behavior, rheology blends were discussed. results showed that EMG good compatibilizer for PPS PA66 through chemical reaction with them. new generated polymer could prevent aggregation dispersed particles reinforce interface bonding....

Environmental challenges, especially dye wastewater produced by printing and dyeing industry, pose a serious threat to global public health, it is an urgent problem realize harmless treatment of wastewater. Here, the combination covalent organic framework materials (TpPa-1) biological matrix (CF) was explored for adsorption dyes first time. The functional ACF-TpPa-1 composite were successfully prepared with collagen fiber made leather waste as matrix, ethylenediamine (EDA) material modified...

Abstract In this study, a noninvasive and nondestructive ultrasonic technique has been used to monitor the polymer injection‐molding process in an attempt establish fundamental understanding of processing/morphology/ultrasonic signal relationships. The not only can provide information on solidification affected by various temperatures pressures but also reflect evolution crystal morphology phase blends. addition, periodic vibration dynamic‐packing process, which melt is forced move...

Abstract The stabilization effect of pentaerythritol (Pe) combined with calcium and zinc stearates (CaSt 2 /ZnSt ) on chlorinated poly(vinyl chloride) (CPVC) is investigated. Congo red dynamic thermal stability data indicate that Pe alone has a mild stabilizing the degradation CPVC. Addition mixed CaSt to this system leads significant improvement in stability. Thermogravimetric studies premature weight loss, not observed either or , when Pe/CaSt systems are employed stabilize Fourier...

In this article, long glass fiber-reinforced polypropylene (LFPP) was prepared using self-designed impregnation device. The effects of some processing parameters including time and temperature, compatibilizer melt flow index (MFI) matrix which adjusted by chemical degradation masterbatch on the quality, mechanical properties injection molded LFPP were discussed. Our studies show that increase in MFI polypropylene, as well addition maleic anhydride grafted (PP-g-MAH), can improve quality...

Abstract An ethylene‐octene copolymer (POE)/polypropylene (PP) thermoplastic elastomer was prepared through dynamically crosslinking by 2,5‐dimethyl‐2,5‐dilbuty (Peroxy) hexane (DHBP). The effects of DHBP concentration, POE/PP ratio, melt flow index (MFI) PP, and mixer rotation on rheology morphology the were studied. results showed that with increasing concentration or POE content, size crosslinked particles as well viscosity increased. Furthermore, agglomerates a network structure formed...

Abstract Crosslinking is an effective way to improve the properties of poly(vinyl chloride). A crosslinking agent consisting R ‐glycidoxypropyltrimethoxysilane (KH560) has been used for first time in order introduce into rigid Different thermal stabilizers (organotin, Ca/Zn stearate, and Ba/Zn stearate) as well sodium bisulfite were tried promote grafting epoxy group enhance degree crosslinking. Fourier transform infrared (FTIR) spectra showed that KH560 with chloride) could take place, a...

Abstract In this article, two novel copolyamide charring agents, ES‐6 and M‐170, were served as agents or synergist with ammonium polyphosphate (APP) dipentaerythritol (DPER) for the flame‐retarded polypropylene (PP). The flame‐retardant system was characterized by limiting oxygen index (LOI), tensile strength, Izod impact thermogravimetric analyses, differential scanning calorimeter (DSC), electron microscope (SEM). Compared polyamide 6 (PA6), M‐170 had better dispersion compatibility in PP...

Abstract Crosslinking is an effective way to improve the qualities of poly(vinyl chloride). A crosslinking system consisting R ‐glycidoxypropyltrimethoxysilane (KH560) has been first used introduce into rigid Different thermal stabilizers (organotin, Ca/Zn stearate, and Ba/Zn stearate) as well sodium bisulfite additive were tried promote grafting epoxyl group enhance degree crosslinking. FTIR spectra showed that KH560 with chloride) could take place, a gel content 40% be obtained when more...

Abstract One of the research hotspot in strategic missile is to develop a multifunctional and lightweight composite launcher, which has certain bearing capacity anti-fragment penetration capability. On this basis, paper designs launcher’s wall by using carbon fiber reinforced epoxy resin double cone structure (CFREPDCS) as sandwich core layer. Due obtain high-speed impact energy-absorption failure characteristic CFREPDCS, quasi-static collapse experiment LS-DYNA finite element simulation...