链段

聚合物的力学性能除了受化学结构影响以外，还与化学组成有关，随体系中PMMA含量和PU中硬链段含量增加，聚合物抗张强度升高，伸长率下降。

As the contents of PMMA and hard segment in PU increase in the system , the tensile strength increases while the elongation at break descends .

聚醚改性聚硅氧烷中的有机硅链段的良好靶向作用，充分提高了聚醚链段表面迁移的效率，实现对PP的亲水改性。

Polyether-polysiloxane in the silicone chain segment play good targeting role . The efficiency of surface migration of polyether chain segment was fully raised and hydrophilic modified on PP was implemented .

非晶PET纤维的分子链段取向分布的研究

Investigation of Orientation Distribution of Molecular Segments on the Non-crystalline PET Fibres

含PC链段的嵌段液晶共聚物增容PC-PET/PHB共混体系的研究

Compatibilization of the pcpet / phb blends with a block crystalline polymer containing PC unit

电子自旋探针技术研究填充改性聚氯乙烯（PVC）链段运动

Electron spin probe study of the segmental motions of polymers

含偶氮苯液晶链段的ABC三嵌段共聚物的合成与表征

Synthesis and Characterization of an ABC Triblock Copolymer with an Azobenzene Block

共聚物中聚丁二烯（PB）链段与聚苯乙烯（PS）链段形成了微观相分离结构。

The phase-separated morphology is formed by polybutadiene ( PB ) and polystyrene ( PS ) sequences .

亲水链段PEG分子量对水性聚氨酯浇铸膜结晶性的影响

Effect of PEG Molecular Weight in Hydrophilic-segment on the Crystallization of Cast Film of Water-borne Polyurethane

界面层结构是PP非晶部分和橡胶链段的相互扩散和缠结粘合的结果；

Interface transition zone structure is the result that pp non-crystal part and rubber chain spread and twine each other .

其特征溶胀指数处于0.938~0.961之间，与松弛平衡扩散的特征指数n≥1相近，水分子扩散速率稍快于聚合物高分子链段的松弛速率。

The swelling index was between 0.938 ~ 0.961.It showed that the diffusion rate of water in the hydrogel slightly exceeded the relaxation rate of macromolecular chains .

当PET链段结晶时，PEG链段被挤出PET折叠链的表面，并不生成共晶。

When PET chains crystallize , PEG chains are squeezed out of the surface offolded PET chains and no co-crystallization appears .

引入聚醚链段可使PBS的亲水性明显改善。

Hydrophilic properties of PBS were improved by the introduction of PEG segments .

我们发现，表面曲率对PS分子链段运动性有很大的影响。

It is found that the surface curvature had a strong effect on the chain mobility of the adsorbed polystyrene .

第一，聚丙烯腈共聚合反应的动力学规律研究，计算了单体的竞聚率，统计推测了PAN的链段序列分布规律。

Firstly , the reactivity ratios of comonomer were calculated . The composition and sequence distribution of copolymers were conjectured statistically .

含有氟烷基链段和炔基的C60衍生物可以进一步进行Click反应连接其它功能基团或者聚合物。

Also the fluoroalkyl-alkynyl-containing C60 derivatives can further to connect to other functional groups and polymers using click reaction .

PDMS链段越长，上述现象更为显著。

PDMS chain segments longer ; the above phenomenon is more significant .

研究结果表明在聚氨酯主链中引入PDMS链段，有利于相分离程度的提高。

The results show that phase separation increase with increasing of PDMS .

随着PET－PBT共聚酯中PBT链段含量提高，共聚结晶熔点不断下降，Tg也有下降趋势。

With increasing the PBT segments content in PET PBT copolyester , the melting point and T g depress .

在目前所研究过的聚合物中，线性聚丙烯酰胺（LPA）对DNA链段的筛分能力最高。

Among the polymers which have been researched , linear polyacrylamide ( LPA ) has high sieving capacity for DNA fragments .

每个共聚物分子由多个PHB链段和PEG链段构成，它们通过共价键相互连接而成为长链大分子。

Every copolymer molecule comprises several PHB and PEG blocks , which are extended by covalent bonds .

这些实验结果表明合成的嵌段共聚物具有明显的表面活性，并且水溶液行为随着憎水链段和亲水链段的长度比及水溶液pH值的变化发生改变。

These results showed that they had excellent surface activity , and the behavior of solution changed with length of hydrophobic and hydrophilic segments and pH values of solution .

sPS有较高的熔点（约263°C），在共聚物中sPS链段的熔融峰值相对较低；

SPS has higher melting point ( about 263C ), the melting peak of sPS chain segment in copolymer is comparatively lower .

PEG-PLA嵌段共聚物的合成及~（13）cNMR对平均链段长度的测定

Synthesis of PEG-PLA block copolymers and determination of average block lengths by ~ ( 13 ) c NMR

研究了PEG的相对分子质量、亲水链段的质量分数与抗静电剂效果之间的关系；

The effects of PEG relative molecular mass and hydrophilic segment content on the antistatic performance of the product were investigated .

热处理过程中，链段的堆砌密度增加，也会对Tg移向高温有部分贡献。

Dense packing of segments during annealing may take place and also have some contribution to the Tg shifting to higher temperature .

研究结果认为，可用PETα转变的松弛时间分布来描述PET非晶区分子链段运动能力的大小和分布；

The investigative results showed that the size and distribution of molecular segmental mobility in PET amorphous region could be described by the relaxation time distribution of PET α transition .

DSC测试表明共聚物具有结晶性能，与PLLA相比，共聚物中PLLA和PEO链段的Tm均下降。

DSC test displayed that copolymers still had crystalline properties , Tm of PLLA and PEO segments of copolymer all decreased .

含OPV链段和卟啉化合物的聚芴衍生物的合成与光电性能研究

Synthesis and Optoelectronic Properties of Poly-fluorene Derivatives Containing OPV Segments and Porphyrin Compound

结果表明，含有聚乙二醇（PEG）柔性链段、同时添加第三单体的共聚醚酯和无机盐的复合物，具有较低的玻璃化温度，从而体积电阻率较低。

Obtained results indicate that the complexes prepared from copolyether ester consisting PEG and other third monomer with ion inorganic salt have lower glass transition temperature T g.

而聚乳酸（PLA）链段具有疏水性，且具有良好的生物降解性，降解产物对人体无害。

Another polymer , poly lactic acid ( PLA ), is hydrophobic and biodegradable , and its degradation products have no negative influences to the human body .