大分子链
- 网络macromolecules
-
蒙脱土(MMT)是一种天然纳米层状硅酸盐,在溶液中大分子链可以插入MMT层间,形成插层复合物。
Montmorillonite ( MMT ) is a kind of natural nano-scale layered silicate . Macromolecules in solution can insert into MMT layers to form the intercalated composite .
-
在130℃时,纤维的冷结晶过程容易发生,大分子链排列紧密,纤维的上染率降低。
The cool crystallization occurred easily at 130 ℃ , leading to tight macromolecules arrangement and some reduction in dye up-take .
-
高性能H·E-聚阴离子纤维素的研究&取代基沿大分子链的分布
Study on high performance H. e-polyanionic cellulose & the distribution of substituent along macromolecular chain by enzymatic degradation
-
含氟离聚体的多相结构及大分子链运动的NMR研究
Carbon-13 NMR studies on multiphase structures and chain dynamics of fluorine-containing ionomers
-
超细长弹性杆作为DNA等生物大分子链的力学模型,其平衡和稳定性问题已成为力学与分子生物学交叉的研究热点。
The dynamical study of a super-long elastic slender rod plays an important role in analyzing many properties of a DNA such as its stability and equilibrium .
-
在PP大分子链上接枝含极性基团的乙烯基单体,可显著提高PP的阻燃性能;
The introduction of the vinyl monomer containing polar group into PP macromolecular chain could improve the flame retardance of PP obviously .
-
在热处理过程中,Fe结合PAN大分子链上的活性N、O元素生成磁性化合物,提高碳基体的磁导率。
During the heat treatment , Fe combined with active N and O to produce magnetic compounds , which would improve the complex permeability of carbon matrix .
-
但是,由于PET大分子链结构规整和结晶度较高,且分子中无强极性基团,故其表面亲和性差,这在很大程度上影响了PET纤维的表面亲水性和染色性。
However , due to its high macromolecular chain regularity and crystallinity , its molecule has no strong polar groups , which affect the surface of the hydrophilic fibers .
-
通过对接枝物的IR分析、交联行为、高温应力-应变曲线及力学性能的测定,研究了聚乙烯大分子链结构对乙烯基硅烷与聚乙烯的熔融接枝反应和交联行为的影响。
The effects of the sort of PE on grafting and crosslinking reactions were investigated by using the IR analysis , crosslinking behavior , DSC measurements and the thermal loading .
-
由于PTT纤维的Z字形大分子链结构和较低的玻璃化温度,使得其比PET更容易染色,且最佳染色温度为110℃,在100℃也有很高的上染率。
Owing to the zigzag macromolecular structure and lower glass transition temperature , coloration of PIT is easier than PET at 110 , the best dyeing temperature for PIT .
-
GPC分析表明,高ML是由于微凝胶和高分子量部分含量高所致,塑炼可使高MLSBR1500中的部分大分子链降解,改善其加工性能而不降低胶料物理性能。
The plasticization could degrade part of macromolecular chains with high ML in SBR 1500 without lowering the physical properties of compounds .
-
由多元羧酸的酸性引起的纤维素大分子链的催化降解是不可恢复的,它的强力损失与酸的种类、浓度、pH值、焙烘温度和时间有关。
Catalysis degradation of cellulose macromolecule chain , caused by acidity of polycarboxylic acid can not be recovered and its strength loss is related to acid type , concentration , pH value , baking temperature and time .
-
由于缩醛化反应不能完全进行,PVB大分子链上含有一定量的羟基。
PVB molecular chain usually contains hydroxyl groups as a result of a not fully complete acetalization reaction .
-
在沿分子堆砌方向上(对PTS则是大分子链方向)上观察到了它们的热刺激电流,并在相应于它们相变152K和192K处呈现热刺激电流峰。
The peaks of current corresponding to their phase transitions at lower temperature in the direction parallel to the stacking were observed .
-
SiO2粒子均匀地分散在环氧树脂基体的三维立体网状大分子链中,起到分散应力,吸收冲击能,阻止裂纹扩展的作用。
This result is attributed to the fact that SiO_2 nano-particles disperses in the molecular chain of epoxy , which absorbs stress and energy , prevents the spreading of crack .
-
经预氧化处理后,PAN纳米纤维表面形态及分子链发生一系列变化,这主要与纤维内大分子链发生环化反应有关。
As the pre-oxidation procession , the surface morphology and molecular chain of PAN nano-fiber can produce a series of changes , which is mainly concerned with the cyclization reaction of macromolecular chain of nano-fiber .
-
振动力场强化了EPDM与PP两相间的结合,使得大分子链段发生断裂和分解所需温度增大,提高了TPE的热稳定性能。
The vibration force field strengthens juncture between EPDM and PP , and increases temperature in which macromolecular chains are broken and decomposed , which enhances heat stability of TPE .
-
壳聚糖(Chitosan,CTS)是自然界中储量仅次于纤维素的最丰富的天然高分子材料,其大分子链上含有较多的羟基、氨基等活性基团,已广泛用作各种载体材料。
Chitosan ( CTS ) is the most abundant natural macromolecule materials in nature expect cellulose . It is applied for vary carrier materials due to containing more hydroxyl and amino groups in the molecular chain .
-
AM聚合表观活化能在EG比在水溶液要高。测定了大分子链自由基向EG分子的转移常数并确定了其在EG溶液中的表观聚合动力学方程。
The overall apparent kinetic equation of polymerization in EG solution and the chain transfer constant for EG have been determined . The overall apparent activation energy of polymerization in EG is much higher than that in H2O system .
-
制备溶液浓度在Cg以上,溶液中的大分子链如同熔体中的一样,仍旧相互贯穿和缠结;冷冻升华后得到链的缠结网络,因而其Tg与本体试样相同。
Above Cg , the macromolecular coils still interpenetrate and entangle each other in the solution as in the melt , thus a network of chains obtained by freeze-drying method has a Tg just same as the bulk sample .
-
通过金属锌的电沉积与丙烯腈(AN)电聚合的复合过程,获得有机大分子链掺杂的金属基复合镀层&锌/聚丙烯腈(PAN)复合镀层。
In this paper , a metal matrix composite coating containing macromolecular chain of polymer , zinc / polyacrylonitrile ( PAN ) composite coating , were obtained through a composite process of zincic electrodeposition and acrylonitrile ( AN ) electrochemically initiated polymerization ( EIP ) .
-
作者认为这些更多数量的微晶体有利于固相缩聚过程中副产物小分子的扩散去除及PET大分子链端基的扩散接近,从而在宏观上表现为PET/MMT的固相缩聚速率大大提高。
These microlites and richer amorphous region will benefit the polycondensation reaction of PET , the diffusion of volatile by-products , and the approach of the end-groups of PET molecular chains by forming more routeways , which may result in the higher rate of SSP .
-
以Cu2+为模板离子,以环氧氯丙烷为交联剂,通过配位键作用,对化学键合在硅胶表面的PEI大分子链进行了离子印迹,制备了复合型Cu2+印迹材料IIP-PEI/SiO2;
Then the molecular imprinted polyethyleneimine on the surface of silica gel was prepared using Cu ~ 2 + as template ions and epichlorohydrin ( ECH ) as crosslinking agent via coordination bond effects , and composite ionic imprinted material IIP-PEI / SiO_2 was obtained .
-
用碘仿作为退化链转移剂,采取以上方法先制得碘原子封端结构的聚氯丁二烯(PCP-I).然后,用PCP-I作为大分子链转移剂,在AIBN引发下,进行苯乙烯的溶液聚合。
Adopting iodoform as chain-transfer agent , the iodine atom-ended polychloroprene was prepared first in accordance with the aforementioned method . Then styrene solution polymerization was conducted in toluene with AIBN as initiator and the above obtained polychloroprenes as macro-chain transfer agents .
-
在剪切作用下,聚合物MXG的缔合结构在低剪切速率时被破坏,随剪切速率的增加,溶液粘度急剧减小;在高剪切速率时,大分子链在流场中取向,溶液表观粘度逐渐降低。
The apparent viscosity decreased sharply with increasing shear rate as MXG associative structure at low shear rate was destroyed ; and the apparent viscosity decreased gradually at high shear rate as macromolecular chain oriented in the flow field .
-
这些优异性能主要来自于液晶聚酯大分子链的高度刚性。
These superior properties ale related with high chain stiffness of liquid crystalline plastics .
-
聚合物凝聚态中大分子链的形态
Morphology of macromolecule in condensed states of polymers
-
聚丙烯酰胺大分子链增强锌基复合材料Ⅱ.复合材料的性能
Zinc base composites reinforced by polyacrylamide macromolecular chains ⅱ . Properties of the composites
-
红外表征表明有机硅链段已经嵌入到聚氨酯大分子链段中。
The FT-IR spectroscopy showed that the silicone chain segment was incorporated into PU macromolecule .
-
激光散射法研究支化大分子链增长行为
The propagation behavior of chain branched on copolymerization of styrene with divinylbenzene by laser light scattering