hard end meaning in English

紧捻经纱
硬端

The theory hypothesis of " pore restriction " is first proposed in this paper . during polymerization , one end of linear molecule inserts the channels of zeolite to form hard end through chemical bond or supermolecule acting force , the other end forms soft end through condensing or polymerizing with other monomer molecule . on the basis of the theory hypothesis , a kind of novel pattern of organic - inorganic composite materials - pu / zeolite composite materials - has been designed
本文首次提出了“孔约束”的理论假说，即在高分子材料聚合过程中，线型分子的一端通过化学键或超分子作用力插入分子筛的孔道中形成硬端，而另一端则与其它单体分子缩合或聚合形成高分子材料的软端；在此假说的基础上，设计了一类孔约束型有机?无机复合高分子材料的新模式，即聚氨酯/沸石分子筛复合材料。