Modification of WPC Materials by Introduction of Dioctyl Phthalate Plasticator

摘要

The study of the properties of materials of wood-polymer composites(WPC).modified with mineral filler and plasticizer.The materials modified with mineral filler possess very low water absorption of 0.013% compared with 1.25% for ordinary material based on the WPC.The stress relaxation of a modified material was investigated and it was found that the master relaxation curve of the modified sample is located in the stress range from 900 to 1300 MPa,which is higher than for the standard sample.Thermal expansion of samples containing the plasticizer dioctyl phthalate(DOP)is in the range from 26 to 68·10~(-6)K~(-1);those,the same as for the control sample that free of mineral filler.The water absorption of the samples plasticized with DOP of 0.013% is also at the level of the samples containing the mineral filler,and significantly less than the water absorption of the control sample.Specific impact strength is 5.8 kJ/m~2,flexural strength is 32 MPa.