伸量
1.Using limited difference method the stretching amount of a basin may be calculated.
2.In the final adjusted position,the amount of mandibular advancement was (5 8±1 4) mm[(71±26)% of the maximum range of protrusion] and that of bite opening(the distance between upper and lower incisor edges) was (4 6±1 1) mm.
3.The tensile strength for cast of the formula is 107.4MPa and the tensile modulus 4.05GPa.
4.The ultimate 2DC/C has the ILSS of 13～16MPa, the tensile strength is between 130～180MPa and modulus 68～93GPa respectively.
5.The results of experiments showed that the epoxy resin matrix had a low viscosity,＜550 mPa·s and long operate life and the casting had excellent mechanical properties that the tensile strength was 107 MPa,modulus of stretch was 4.09 GPa,flexural strength was 161 MPa,flexural modulus was 3.88 GPa and extensibility was 6.1%.
6.It was obvious that the polymers prepared in the experiment were surely " ploy ( 1 , 4-phenylene terephthalamide), and it belonged to nematic liquid crystal phase. The denier of aro matic fiber-II (YS - AF1414) initially span from the PPTA polymers was 1.4, tensile strength was 19.7g/d, tensile modulus was 450g/d. The performance indexes were similar to those of Kevlar 29 (U.S.A.) .
7.When the contents of KH550-treated attapulgite and EOC-g-MAH is 10 % and 15 % respectively,compared with crude EOC,100 % tensile modulus,tensile strength and tear strength of AT/EOC composites increase by 104 %,65 %,25 % respectively.
8.Adding black carbon and PP fibers into GMT materials, we studied the effect of carbon black and PP fibers on the structure and properties of GMT materials. The results indicate that the tensile strength and tensile modulus of GMT materials are increased by about 5% and 10% respectively after the change of spherical scrystallinity into transcrystallinity.
10.Results show that co-braided optical fibers have just a small quantity of effect on the elastic modulus of the braided composites.
