Although no regular relationship between the modulus and v existed , it still could be shown that the good auxetic properties did exist in the polyolefin blends whose modulus differential was in the range from 800 to 1000 mpa between two phases 模量研究结果表明组分的模量组成与共混体系的泊松比值并无有规律性的联系，但两相模量差在800一io00mpa范围内体系呈现很好的负泊松比效应。
2.
The v was tested by yjy stress transducer with mvad card by the methods of recording the deformation in the wideness and thickness direction of the specimens during the tensile test . a stable auxetic polyolefin blend with the minimal value - 1 . 4 was observed after repeated test 采用附有mvad通道卡的yjy型片式传感器，记录试样在拉伸过程中宽度和厚度方向的形变并根据泊松比的定义进行计算，反复实验后获得最小值为- 1 . 4的负泊松比烯烃共混体系。
3.
In addition to , the effects such as process pressure , the consistence and modulus relationship on the v of the auxetic polyolefin blends were discussed respectively . it was observed that the minimal v of auxetic polyolefin blends reached - 1 . 6 under low pressure from the contrast result of different specimens processed under 20 % , 40 % , 60 % of atoms 对比在20 、 40 、 60个气压下制备的试四川大学硕十学位论文样泊松比测试结果，发现低压条件下可获得最小值为一1 . 6的负泊松比共混体系。
4.
Based on the understanding of netative poisson ratio mechanism and the characteristics of liquid crystalline polymers , the ability for the smectic liquid crystalline polymers possibly to bear the auxetic behavior was firstly proposed . at the same time the ideal molecular model was upbuilt and the calculation about the negative poisson ratio of smectic liquid crystalline polymers was theoretically carried out 经过对负泊松比产生机理和液晶高分子特征的理解，首次提出了近晶c相液晶高分子也具有产生npr效应的能力，建立了近晶c相液晶高分子产生负泊松比的分子模型，并且对其负泊松比进行了理论计算。
5.
Through molecular design , a series of liquid crystalline copolyesters , which possibly possessed the auxetic behavior , were prepared by solution condensation reaction between 2 , 5 - bis ( p - alkoxy benzoyloxy ) hydrobenzoquinone , 4 , 4 ' - ( decanoxy ) dibenzoyl chloride and 4 , 4 ' - dihydroxy - oc , co - diphenoxydecane 经分子设计，通过2 ， 5 ?二(对烷氧基苯酰氧基)对苯二酚、 4 ， 4 ’ ?二羟基? ， ?二苯氧基癸烷和4 ， 4 ’ ? (癸二酰氧基)二苯甲酰氯之间的缩合反应合成了一系列具有负泊松比潜能的液晶共聚酯。
6.
Rotation - cavitation mechanism was outlined based on the experiment results and the essential conditions for the occurrence of auxetic properties in polyolefin blends were concluded as followed : firstly there must be at least two phases , the matrix can be soft materials which were able to be networks when being stretched , as well as suitable consistence must be provided between two phases . fracture stress work measurement was optioned to characterize the force between two phases . finally , the auxtic property repeatability of the blends was measured and the fact that the auxetic property could only occur in the elastic range was certificated by the result that only the specimens which were stretched for 5s , 10s had repeatability after being retained for 1 months 实验工作的最后一部分研究了体系负泊松比效应的可重复性，选取稳定的负泊松比共混体系在测试数据采集时间为55 、 105 、 155 、 205条件下进行测试，将样条放置l天、 10天、 30天进行测试，测试结果表明，在5s 、 105条件下测试的试样在放置一个月后泊松比测试结果具有可重复性，证实了体系的负泊松比现象发生在材料的弹性形变范围内。
