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单体接枝
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  phase graft
     The isotactic polypropylene (PP) was modified by solid phase graft copolymerization with glycidyl methylacrylate (GMA) and styrene (St), using benzoyl peroxide (BPO) as the initiator and xylene as the interfacial agent.
     本文采用固相法对等规聚丙烯(PP)进行多单体接枝改性,在过氧化物引发剂的作用下,以苯乙烯(St)为共单体,将甲基丙烯酸缩水甘油酯(GMA)接枝到聚丙烯分子侧链上。
短句来源
  “单体接枝”译为未确定词的双语例句
     The optium grafting conditions were determined experimentally,which are[(NH 4) 2S 2O 8]of 10.0 mmol/L,[NaHSO 3]of 8.5 mmol/L,=16.5×10 -2 ~20.0×10 -2 mol/L,Temperature=20~30℃,Time=180 min.
     选择(NH4)2S2O8浓度为10.0mmol/L,NaHSO3浓度为8.5mmol/L,单体(MMA)浓度为16.5×10-2~20.2×10-2mol/L,在20~30℃反应180min,可得较理想的接枝率和单体接枝效率。
短句来源
     Supercritical CO_2-Assisted Multi-Monomer Graft Copolymerization of Polypropylene
     超临界CO_2协助多单体接枝改性聚丙烯
短句来源
     The reactivity order of monomer was:MMA>GMA>MA>EMA.
     单体接枝活性顺序为:MMA>GMA>MA>EMA。
短句来源
     With nonionic OP-10 as emulsifier,potassium persulfate (K_2S_2O_8) as initiator,acrylic acid(AA) modified paraffine(PF) hybrid emulsion was synthesized by seed emulsion polymerization.
     用种子乳液聚合法,以OP-10作为乳化剂,以K2S2O8 作为引发剂,以丙烯酸 (AA)为单体接枝改性石蜡(PF)乳液,合成了石蜡丙烯酸(PFAA)复合乳液。
短句来源
     Using(NH 4) 2S 2O 8 as degradation agent , the relationship of starch oxidative degradation conditions and grafting copolymerization of starch /acrylic monomers was studied in this paper .
     以氧化剂 (NH4) 2 S2 O8为淀粉降解试剂 ,研究了降解条件与淀粉 /丙烯酸类单体接枝共聚反应的关系。
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  相似匹配句对
     Study on solid phase grafting polymerization of bimonomer onto polypropylene
     双单体固相接枝聚丙烯
短句来源
     A Bench-scale Study of Grafting Molten Polypropylene with Unsaturated Monomer
     用不饱和单体熔融接枝聚丙烯
短句来源
     THE GRAFTING OF SILK
     蚕丝的接枝
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  phase graft
Results show that the compound organification, solid phase graft copolymerization really favored the melting intercalation.
      
The increase of the mechanical properties and thermal properties was owed to the reinforcement of the exfoliated MMT and the compatibilization of the oligomers built by the polar monomers during the solid phase graft copolymerization.
      
The gas-phase graft polymerisation of acrylonitrile on ultrafine chlorinated polyvinyl chloride fibre
      
The PTFE surface was functionalized by CO2 plasma activation and subsequent vapour-phase graft polymerization of acrylic acid.
      
The polymerizations were carried out in solution, in the case of acrylic acid a vapor phase graft-co-polymerization subsequent to argon plasma activation was carried out as well.
      


The graft copolymerization of monomer-olefins on polypropylene film by a pre-irradiation of gamma-ray under atmosphere has been studied. Both radicals and peroxides, which were produced during the irradiation in air, can initiate graft copolymerization.When the irradiated polymer is stored for a long period under atmosphere at 100℃ before grafting, the trapped radicals will decay gradually; although the grafting may be still induced by the peroxides, the degree of grafting is apparently decreased.The activation...

The graft copolymerization of monomer-olefins on polypropylene film by a pre-irradiation of gamma-ray under atmosphere has been studied. Both radicals and peroxides, which were produced during the irradiation in air, can initiate graft copolymerization.When the irradiated polymer is stored for a long period under atmosphere at 100℃ before grafting, the trapped radicals will decay gradually; although the grafting may be still induced by the peroxides, the degree of grafting is apparently decreased.The activation energy of the grafting initiated by the peroxide was calculated as 10.9-18.3 kcal/mol.Such grafted film may be dyed with direct or acid dyes in aqueous bath when the degree of graft is about 20% by weight.It has been shown that the mechanical properties of the copolymer depend on its supramoleculer structures.

1.聚丙烯与乙酸乙烯酯、甲基丙烯酸甲酯、丙 烯腈接枝后,提高了染色能力,其中以接乙酸乙烯酯为最好。 2.研究了不同接枝量接枝共聚物的结晶过程,以球晶结构变化解释了接枝共聚物断裂强度的下降。 3.研究了接枝反应与预照射条件,计算了四种单体的接枝反应活化能。指出选择乙酸乙烯酯的浓度在50~60%不仅可以避免大量的均聚物,且接枝量能达到聚丙烯改性要求。

Polyethers could form hydroperoxide under air-oxidation or photooxidation in the presence of H2O2. The scission of ether linkages induced by moderate oxidation was prevented by controlling the reaction time and hydroperoxide concentration. The oxidation rate was affected by the end groups of polyethers. The decreasing order of oxidation rate for various poly(oxytetramethylene) derivatives having different end groups are as follows: poly (oxytetramethylene) glycol (PTMG) > poly (oxtetra-me thylene) acetate (PTMGAC)...

Polyethers could form hydroperoxide under air-oxidation or photooxidation in the presence of H2O2. The scission of ether linkages induced by moderate oxidation was prevented by controlling the reaction time and hydroperoxide concentration. The oxidation rate was affected by the end groups of polyethers. The decreasing order of oxidation rate for various poly(oxytetramethylene) derivatives having different end groups are as follows: poly (oxytetramethylene) glycol (PTMG) > poly (oxtetra-me thylene) acetate (PTMGAC) > poly (oxytetramethylene) phenylamino formate (PTMGPIC). The urethane end groups in PTMGPIC increase the resistance toward oxidation. Polyether hydroperoxide reacts with ferrous ion or N, N-dimethyl-p-tolui-dine (DMT) to form polymeric-oxy radical which then initiates the graft eopolymeri-zation of vinyl monomers at low temperature, and was devoid of homopolymerization. The copolymer after separation and purification was proved to be a graft one by IR analysis and elemental analysis.

聚醚在空气氧化或在H_2O_2存在下的光氧化条件下,很容易被氧化成过氧化氢物。控制适度的氧化时间和过氧化氢物浓度,可避免发生链的断裂。聚醚过氧化氢物与亚铁盐或N,N-二甲基对甲苯胺作用,可在较低温度下引发烯类单体接枝共聚,并可避免均聚反应。接枝率随过氧化氢物浓度的增加而增加,随反应时间延长而提高,改变N,N-二甲基对甲苯胺的浓度,接枝率也随之改变。共聚产物分离提纯后,经IR光谱测定和元素分析,均证实了产物为一接枝共聚物。聚醚的氧化及接枝共聚的实验,为聚醚氨酯的氧化和接枝共聚的机理的研究,提供了基本数据。

A comprehensive report about the graft copolymerization of silk is made in

本文是有关真丝绸接枝共聚的综述.主要论述真丝绸接枝共聚的引发剂体系、单体、接枝蚕丝织物的理化性能等工艺因素.对实用的加工方法作了比较和介绍.

 
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