RSC advantages: equilibrium effect of α nucleating agent and glass fiber on polypropylene composite

Compared with the traditional materials, the new fiber-reinforced polymer composites are widely used in aerospace, military, national defense, automobile, shipbuilding, medical equipment, sports equipment and other fields because of their light weight, high strength and excellent comprehensive performance Polypropylene (PP), as one of the five general-purpose thermoplastic resins, has become the fastest-growing general-purpose plastics, with its output second only to polyethylene and polyvinyl chloride However, PP still has some shortcomings, such as high shrinkage during processing, low toughness and impact strength at low temperature, and easy aging With the continuous improvement of the requirements for the comprehensive mechanical properties of materials in new application fields and occasions, the development of new high-performance polypropylene composite technology has become an important research content in this field The schematic diagram of new polypropylene composite prepared by α series nucleating agent modification and glass fiber reinforcement (source: RSC advance) was inspired by fiber reinforcement and phase transformation toughening of biological bone tissue replacement material, Zhang Yagang research team, resource chemistry research office, Xinjiang Institute of physical and chemical technology, Chinese Academy of Sciences A new method for the synthesis of new polypropylene composite was developed by combining fiber reinforcement with nucleating agent to control the crystallization behavior of polypropylene This method is made of polypropylene, compatibilizer, glass fiber, nucleating agent and antioxidant by two-step process Firstly, nucleating agent is used to induce the nucleation of polypropylene, and then glass fiber is used to further strengthen it This method solves the problem of directly mixing polypropylene with nucleating agent and fiber in the traditional method, because glass fiber is introduced as a foreign impurity, The nucleating agent can not play an effective role in controlling the crystallization behavior of polypropylene For the first time, the effect of the composite system of different α nucleating agent and glass fiber on the preparation of PP composite was systematically studied, and the effect of the concentration of nucleating agent on the mechanical properties of PP composite was investigated A series of α nucleating agent / glass fiber composite system and the best formula were found, which can make PP reach the balance of rigidity and toughness at the same time Paper link: http://pubs.rsc.org/en/content/articlelanding/2017/ra/c7ra08322jා! Divabstract