polysiloxanes ( c) containing ester groups were obtained by cohydrolysis of 2-( carbomethoxy) propyl methyl dichlorosilane ( a) and 2-( acetoxy) ethyl methyl dichlorosilane ( b).
通过2-(甲氧羰基)丙基甲基二氟硅烷(A)与2-(乙酰氧基)乙基甲基二氯硅烷(B)的共水解缩聚反应,得到含酯基的聚硅氧烷(C)。
The preservation of green peppers by using sucrose ester, chitin and propyl-p-hydroxybenzoate was studied, and the nitrite content of green pepper during storage was analyzed.
研究了以蔗糖酯及壳聚糖为涂膜剂,并配合防腐剂对羟基苯甲酸丙酯对青椒进行涂膜保鲜处理,观察青椒在贮藏期间亚硝酸盐含量的变化。
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