When a conjugated system was contained in the cyclic anhydride , it gave n - phenylimide as the major product 结果表明，环酐的分子结构直接影响反应结果，当酸酐分子存在共轭结构时以n -芳基内酰胺为主要产物。
During the development about ten years , the situation of tma market in our country is that the throughput is overmuch and competition is too keen 经过近十年的发展，国内偏苯三酸酐市场的现状是：生产能力过剩，竞争日趋激烈。
By virtue of the anhydride property of the isoimide rings , the piis were reacted with the alcohols to form poly ( amic acid ) esters ( paes ) 利用异酰亚胺环具有酸酐性质的特点，使之与醇类反应，得到溶解性能优良的聚酰胺酯( paes ) 。
The relationship between the factors such as the molecular weight of copolymer and peg , the proportion of monomers and peg , have been discussed 同时讨论了共聚物单体配比、 peg分子量、 peg与马来酸酐的投料比与酯化产物的性能关系。
Producer of barium and strontium salts in china . products include nitrates , sulfates , hydroxides , and chlorides , as well as some inorganic coproducts -主要生产重铬酸钠酸酐盐基性硫酸铬等铬盐产品，包括公司简介，产品介绍和联系方式等。
Materials and articles in contact with foodstuffs - plastics substances subject to limitation - determination of maleic acid and maleic anhydride in food simulants 和食品接触的材料和物品.受限制的塑料物质.食品模拟物中马来酸和顺式丁烯二酸酐的测定
The resin of alkali developable photosensitive has been synthesized from the raw material of acrylic acid , maleic anhydride and epoxidized soybean oil 摘要以环氧大豆油、丙烯酸和马来酸酐为原料合成了碱溶性光敏环氧丙烯酸酯齐聚物，用红外光谱对产物进行了表徵。
In this paper , the various kinds of accelerators which were used for curing epoxy resin with acid anhydride , and the accelerative mechanism in the epoxy resin curing system were introduced 摘要评述了几类用于酸酐固化环氧树脂的促进剂及其在酸酐/环氧体系中的固化促进机理。
A variety of aldehydes were converted into acylals in good yields with anhydride in the presence of a catalytic amount of zinc bromide under solvent - free conditions 以醛和酸酐为原料，溴化锌为催化剂，无溶剂条件下高产率地合成了偕二酸酯（其中醛与苯甲酸酐的反应是首次报道） 。
A variety of aldehydes were converted into acylals in good yields with anhydride in the presence of a catalytic amount of zinc bromide under solvent - free conditions 摘要以醛和酸酐为原料，溴化锌为催化剂，无溶剂条件下高产率地合成了偕二酸酯（其中醛与苯甲酸酐的反应是首次报道） 。
