Standard test method for measurement of average viscometric degree of polymerization of new and aged electrical papers and boards 新的和老化的电绝缘纸和纸板聚合作用的平均粘滞程度的测量的标准试验方法
Measurement of the average viscometric degree of polymerization of new and aged cellulosic electrically insulating materials iec 60450 : 2004 ; german version en 60450 : 2004 新的和老化的纤维素电气绝缘材料的粘均聚合度测量
Fos contain mixture of gf2 , gf3 and gf4 sugars ( where g = glucose molecule and f = fructose molecule ) and a dp ( “ degree of polymerization ” ) of 3 - 5 ( “ neosugar ” ) , are not naturally - occurring but are enzymatically synthetized from sucrose by action of an enzyme from the fungus aspergillus niger 详细说明：是以蔗糖做底物，采用呋喃果糖苷酶转果糖基作用，在蔗糖分子上以（ 1 2 ）糖苷键上与1 - 3个果糖分子结合，形成的蔗果三糖（ gf2 ） 、蔗果四糖（ gf3 ） 、蔗果五糖（ gf4 ）属于果糖和蔗糖构成的直链杂低聚糖，在形成的产物中还有果糖、葡萄糖和未反应完全的底物蔗糖，采用色谱法除去单糖和双糖制得高纯度的低聚果糖。
When the dosage was 8 % aa , the effect was best . ( 2 ) the performance of pc was decided with the proportion of pea , aa , mma . the fluidity of copolymer would augment if the dosage of aa increase , but when dosage of aa was 75 % , it was hard to control the compose reaction , and dispersion of pc would depress ; when pea degree of polymerization augment the air - entraining of mma would increase ; it would produce floe and hard to control the compose reaction when the dosage of pea4 more than 15 % , pea23 more than 25 % ( 2 ) pea 、 aa 、 mma之间的比例关系决定了共聚体的性能：随着丙烯酸用量的增加，共聚体的流动度增大，达到75时合成控制难度加大，共聚体分散性下降；而mma的引气增稳作用，其用量随着pea的聚合度的增加而增加， pea4体系的用量超过15 ， pea23体系超过25则会产生絮状物，反应控制难度加大，理想的用量分别为不超过10和15 。
( 5 ) the article also investigate the recrystallization condition of crude lactide and point out that it also an important factor have influence on the purification production ratio . ( 6 ) give the kinetics equation of depolymerization reaction . by determination the degree of polymerization ( dp ) of the reaction system , we can get the kinetics data of the reaction 本文建议使用乙酸乙酯和异丙醇混合溶剂( 6 ： 4 )对丙交酯粗产物进行重结晶； ( 6 )提出解聚反应的动力学方程，认为它是一个可近似处理为一级反应的连续反应，并可通过测定体系的平均聚合度的方法来得到包括活化能在内的反应动力学数据。
