嵌段共聚物

It is found unexpectedly that for any composition of theEOBT segmented copolymers, when ζ=0.22, the hard segments can start to crystallizeand the crystallizability of the hard segments increases with ζ. Although the definite valuehas no universal significance for all kind of segmented copolymers.

考虑到硬链段受限的程度与软硬链段的长度都相关，用硬链段和软链段的长度比ζ=〓来表征硬链段在这种受限条件下的结晶能力，则发现对于任何分子量的EOBT多嵌段共聚物，只要ζ＞0.22，硬链段就能结晶，此后，硬链段的结晶能力随ζ的增大而增加。

Based on the study of the assembly of block copolymers in dispersion medium and at the interface of fiber reinforced polymer composites, the micellization in solution of block copolymers and the micelles size were in control.

研究了嵌段共聚物在分散介质及纤维增强聚合物复合材料界面的组装行为，掌握了共聚物胶束的形成条件及胶束尺寸的控制方法。

Multiphase copolymeric systems such as block copolymers have certainly beenone of the most active research fields of macromolecule chemistry.

多相的共聚物例如嵌段共聚物是高分子化学的一个热门的研究领域。

Multiphase copolymeric systems such as block copolymers have certainly beenone of the most active research...

多相的共聚物例如嵌段共聚物是高分子化学的一个热门的研究领域。

Our result shows that for block copolymers in nonselective solvents,we can induce the micellization through the hydrogen bonding complexation betweenone of the block and its complementary polymer.

我们的结果表明，嵌段共聚物在非选择性溶剂中，能通过某一嵌段与另外一种高分子之间的氢键作用导致的络合诱导胶束结构的形成。

This paper has studied the relationship between the peeling strength and the relative amount of oxygen - containing groups produced on the surfaces of propylene homopolymer, ethylene - propylene block copolymer and random copolymer when ozonization was used to improve the coating properties of PP surface.

研究了用臭氧氧化法对聚丙烯表面进行涂装性改良时，丙烯均聚物、乙烯—丙烯嵌段共聚物及无规共聚物表面上含氧官能团相对生成量和涂膜剥离强度之间的关系。

Dendritic-linear block copolymers are also a type of structurally novel polymers, which have a flexible linear chain and one or two semirigid dendritic blocks. The copolymers have many unique melt and solution properties, their basic theory and practical applications have been studied.

树枝状-线形嵌段共聚物是另外一类包含树枝状聚合物结构单元的聚合物类型，这种复合结构结合了嵌段和树枝状聚合物的优点，表现出独特的熔融和溶液性质，在理论研究和实际应用方面都具有重要的研究价值。

The effect of the addition of sodium dodecyl sulfate upon the behavior of the F127 triblock copolymer solution has been studied in this work.

对PEO-PPO-PEO（F127）三嵌段共聚物的水溶液行为及添加十二烷基硫酸钠后对共聚物溶液行为的影响进行了研究。

For bulk lamella-forming diblock copolymers, perpendicular lamellae and concentric lamellae spontaneously form under the neutral and strongly preferential surface, respectively. When the surface preference is relatively weak, novel structures such as parallel lamellae, helices and catenarian structures are observed.

对体相形成层状相的双嵌段共聚物，我们发现在中性孔壁下共聚物自组装形成垂直于孔壁的垂直层结构，在强选择性孔壁下形成一系列的同心层结构，而在弱选择性孔壁下形成平行于孔轴的平行层、螺旋和链节等新奇结构。

The prepared PU was an elastic solid,which could dissolved in ethanol,and it exhibited strong deep purple fluorescence at the peak of 365 nm along with a shoulder at 386 nm as a thin film. Obviously,the prepared PU also was a kind of uncommon ultraviolet-emitting polymer materials.2.A novel water-soluble rod-coil block copolymer was designed and prepared successfully via the facile isocyanic acid polycondensation method using polyfluorene as rod segment and polyethylene glycol as coil segment in the main chain for the first time.

所制备的聚氨酯是一种弹性固体，可以溶解在乙醇中，同时又显示出具有半导体性质的荧光性能——最大荧光发射峰在365 nm并且在386 nm处有一个小的侧肩峰，可见它又是一种非常难得的紫外发光聚合物材料。2、首次采用了简单的异氰酸酯反应，成功地将聚芴作为刚性链段和聚乙二醇作为柔性链段，以嵌段方式连结到聚合物分子主链上，从而形成了一种新型的具有刚性链—柔性链结构的嵌段共聚物。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。