无定形区

木材纤维素晶区和无定形区对水分的吸着作用

Effect of crystallinic and amorphous regions of wood cellulose on moisture absorption

无定形区蜷曲大分子伸直时模量较低，导致出现模量低谷；

The valley after the first peak can be attributed to low modulus of the uncoiling molecular chains in the amorphous regions .

X射线衍射图谱和SEM照片表明，酸降解和酯化反应主要发生在淀粉分子结构的无定形区。

The result of SEM photoes and X-ray diffraction reveal that reaction mainly occur at amorphous region .

在无定形区是相容的，在晶区是部分相容的，PTT的加入对PET的结晶有促进作用。

And the adding of PTT can accelerate the crystallization of PET .

PET／PTT共混体系在无定形区的相容性

Compatibility of PET / PTT Blends in Amorphous Zone

长周期L、无定形区厚度A以及晶区厚度C均随PBT含量的增加而减小。

Long spacing , crystallize core thickness and amorphous thickness decrease with increasing PBT .

本文介绍一种用于提高结晶高聚物PET和PBT电子显微图象衬度的丙烯胺四氧化锇染色方法。通过列举的照片，可以直接观察到结晶PET和PBT的两相结构晶区和无定形区。

A staining method with allylamine and Osmium tetroxide for the analysis of crystalline polymer PET and PBT is presented in this paper .

在相容性好的聚丙烯合金多相体系中，EPR共聚物部分嵌入到聚丙烯的无定形区。共聚物组分间的连续性变化，对聚合物材料的韧性有很大贡献。

If the polypropylene alloy multiphase system has better compatibility , EPR copolymer embeds into the amorphous area of polypropylene , which has great contribution to the impact resistance of polypropylene alloy material .

接枝反应不仅发生在淀粉的无定形区也发生在结晶区，且接枝后接枝淀粉的结晶度有所提高。（2）出苗率均有所提高，0.8A处理组最为显著；

Further , the crystalline of grafting starch increased after the grafting procedure . ( 2 ) the seed germination ratio of the groups treated with plasma was increased , among which 0.8A group was profoundly improved most ;

环氧交联剂在碱性条件下同时与氧化苏木精分子中的酚羟基和纤维素分子中的羟基发生了醚化交联反应，与纤维素分子的交联反应主要发生在棉纤维的无定形区。

The cross linking reaction with cellulose mostly occurs in the amorphous region .

自然发酵主要作用于淀粉的无定形区，对结晶区的结构影响不大。

The natural fermentation mainly affected the amorphous region of the starch granule structure .

结果表明，该共聚物在淀粉颗粒上进行自由基接枝共聚反应，并且反应主要发生在淀粉颗粒的无定形区。

It is found that the grafting copolymerization of copolymer happens on the starch granula .

丝纤维无定形区形态结构研究

Researches on Amorphous Fibroin Shape and Structure

经研究认为：化学反应首先发生在淀粉颗粒表面的无定形区；

It was found that the chemical reaction predominantly taken place in amorphous domains of starch granule ;

分子间键合减弱，尤其在聚合物的无定形区内更为明显。

There was a weakening of the intermolecular bonds , primarily in the amorphous region of the polymer .

交联反应主要发生在棉纤维的无定形区，对晶区结构基本没有影响。

The cross-linking reaction mostly occurred in amorphism region so that almost no influence to crystal structure of fibre .

淀粉颗粒结晶结构的晶型仍为A型，主要是无定形区受到削弱或破坏；

The crystal structure of the starch granule remained A type , but the amorphous area was weakened or destroyed .

在酶解中、后期，纤维素酶对纤维素结晶区和无定形区的作用呈现周期性变化。

The cellulase action was changed at the crystalline region and the amorphous region periodically in the anaphase of enzymatic hydrolysis .

可能是蒙脱土片层占据了聚乙烯的无定形区，使得自由体积减少，载流子迁移困难。

The montmorillonite layers may occupy the amorphous region of PE , which lead to the free-volume reduce and carriers ' transition difficulty .

热处理后纤维的总取向增大，而晶区取向基本不变，故无定形区取向大幅度提高。

In addition , the general orientation of heat-treated fiber increases and the crystalline orientation is unchanged , the amorphous orientation improves accordingly .

X-射线衍射分析表明淀粉的酯化反应主要发生在分子的无定形区，并未使其晶型发生改变，仍保持为糯小麦原淀粉的A型。

X-ray analysis showed that the OSA starch occurred mainly in amorphous molecular areas and still maintained the same crystalline pattern as native starch .

甘油分子进入木材无定形区后与水分子相似，通过氢键结合吸附在木材无定形区的羟基上的。

Glycerol was adsorbed on hydroxyl groups in amorphous region of wood by hydrogen bonding after entering into the amorphous region , which was similar to water molecules .

水是由亲水性的离子化通道扩散透过膜，而乙醇是由亲油性的高分子无定形区扩散透过膜；

Water diffusion is localized in the hydrophilic ionic region formed by the ionized groups , whereas ethanol diffusion is localized in the hydrophobic amorphous network of the polymeric membrane .

结果指出，在80℃固相氯化反应主要在无定形区发生，而在120℃氯化反应已不局限于无定形区了。

The experiments show that the solid-phase chlorination . at 80 ℃ mainly occurs in amorphous regions , but at 120 ℃ it occurs in and be-yond the amorphous regions .

同时，无定形区的分子运动及松弛受到限制，玻璃化温度的升高，α松弛峰变大。

At the same time , the molecular motion and relaxation of amorphous areas were restricted , the glass transition temperature increased and the peak of a relaxation became larger .

由三氯氧磷变性木薯淀粉所得的酯化交联淀粉，颗粒完整，形貌和偏光十字形态保持不变，反应主要发生在淀粉颗粒的无定形区内；

Tapioca starch was modified with phosphorus oxychloride , whose morphology and hilum were same as those of native starch granules , and the reaction mainly took place in the amorphous size of starch granules .

结晶度的增加主要是纤维素Ⅳ的增加，而纤维素Ⅳ的形成包括由无定形区大分子结晶和由纤维素Ⅱ转化两个过程。

The increase of crystallinity is mainly produced from cellulose ⅳ . The formation of cellulose ⅳ occurs in two processes : the crystallization of macromolecules in amorphous regions and the transformation from cellulose ⅱ .

本文根据纤维素晶区和无定形区的概念，考虑羟基是具有电极矩的极性基因，算出羟基的电矩。

Considering the concept of the crystallinic and amorphous regions of cellulose , and the fact that hydroxyl is a polar radical with electric pole moment , the electric moment of hydroxyl can be worked out .

磷酸酯淀粉的红外光谱图表明淀粉酯化反应后仍然保持原淀粉的结晶性结构，证明酯化反应主要发生在淀粉的无定形区，极少数发生在结晶区内。

Infrared spectrogram of starch phosphate esters indicates that they still keep crystal structure of starch after esterification . Which proves that esterification mostly happens in amorphism areas of starch and little happens in its crystal areas .

测试整理后的织物结构和性能表明，整理剂在纤维无定形区大分子链之间发生了交联反应，提高了纤维的热稳定性，纤维的晶区结构基本没有改变。

The results show that the crosslinking reactions occurred between finishing agent and big-molecule chains of the uncrystallized region of fibers , which improves heat stability of fibers with little change in the structure of crystallized area of fibers .