| abstract |
The invention discloses polybutylene terephthalate with improved impact toughness and a preparation method thereof. The polybutylene terephthalate with improved impact toughness comprises the following components in percentage by mass: 40-80% of polybutylene terephthalate, 10-30% of a composite toughening agent, 10-30% of glass fibers, 0.5-3% of a lubricant and 0.1-1% of an antioxidant, wherein the composite toughening agent is a compound of a polyolefin modified toughening agent and a polymeric elastomer graft copolymerization toughening agent, the polyolefin modified toughening agent accounts for 30-70wt% of the composite toughening agent, and the polymeric elastomer graft copolymerization toughening agent accounts for 70-30wt% of the composite toughening agent. The polybutylene terephthalate disclosed by the invention has the beneficial effects that the composite toughening agent and the glass fibers are adopted to perform synergistic toughening and strengthening on polybutylene terephthalate, so that the notch impact strength, tensile strength, bending strength and good processability are greatly improved, and the comprehensive performance of the polybutylene terephthalate is excellent. |