Influence of the structure of phosphorus(III)-containing oligoester(meth)acrylates on the physical and mechanical properties, thermal stability, and combustion mechanisms of cured polymers

Objectives. The work sets out to investigate the influence of the structure of spacer in structure of phosphorus(III)-containing oligoester(meth)acrylates on physical and mechanical properties of polymers and their combustibility. Methods. The physical and mechanical properties of polymers were determined using the following: DMA 242 E Artemis dynamic mechanical analyzer ( NETZSCH , Germany); universal testing machine for standard tests on materials ( ZwickRoell Group , Germany); GT-7045-HMH(L) impact test machine ( Gotech Testing Machines, Inc ., Taiwan); Q-1500 D derivatograph of the Paulic–Paulic– Erdey system (thermogravimetry, IOM , Hungary); Oxygen Index Module device for determination of burning behavior by plastic flammability testing according to oxygen index ( Concept Equipment , United Kingdom); GT-7045-HMH(L) device for determination of the Vicat softening temperature ( Gotech Testing Machines, Inc ., Taiwan); SFT-110XW supercritical fluid extractor ( Supercritical Fluid Technologies, Inc ., USA) for supercritical fluid extraction with carbon dioxide. Results. The influence of the spacer structure in the structure of phosphorus(III)-containing oligoester(meth)acrylates on the dynamic mechanical and physicomechanical properties of polymers was established. Comparative assessment of the impact of the spacer structure on properties of polymers was carried out in terms of their heat stability (thermogravimetric analysis) and combustibility (measurement of limited oxygen index). It is established that polymers having balanced physical and mechanical properties can be obtained by introducing spacer characteristics into the oligomer structure. Polymers obtained on the basis of phosphorus(III)-containing oligoester(meth)acrylates with spacers demonstrate considerable resistance to impact strength tests. Conclusions. The achieved results testify to the possibility of obtaining polymers on the basis of phosphorus(III)-containing oligoester(meth)acrylates with spacer attributes that possess increased resistance to impact strength and thermal stability tests at an insignificant decrease in their combustibility.