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boron modified phenolic resin
相关语句
  硼酚醛树脂
     APPLICATION OF BORON MODIFIED PHENOLIC RESIN IN PAINT
     硼酚醛树脂在涂料中的应用
短句来源
     An ambient curable heat-resistant anti-corrosive paint has been pr epared by mixing of boron modified phenolic resin and epoxy resin, which combine s the outstanding acid and alkali resistance and heat resistance of boron modifi ed phenolic resin and ambient curable performance of epoxy resin.
     通过将硼酚醛树脂和环氧树脂进行混用,利用硼酚醛树脂优异的耐酸、碱腐蚀性能以及耐高温性能和环氧树脂可以常温固化成膜的特点,制备常温固化的耐高温防腐蚀涂料。
短句来源
  硼改性酚醛树脂
     The relationship between glass fiber(GF) content and thermal properties and mechanical properties of glass fiber reinforced boron modified phenolic resin(GF/BPR) composites were studied.
     研究了玻璃纤维(GF)含量对玻璃纤维增强硼改性酚醛树脂(GF/BPR)复合材料力学性能、耐热性能的影响.
短句来源
     In this paper, boron phenolic resin/nano-SiO_2 composite was synthesized in-situ technique based on the preparation of phenolic resin and boron modified phenolic resin.
     本文在制备纯酚醛树脂和硼改性酚醛树脂的基础上采用原位聚合法合成了硼酚醛/SiO_2纳米复合材料。
短句来源
     Effect of catalyst content,reaction time and temperature on synthesis of boron modified phenolic resin was investigated and the relationship between mechanical properties of carbon fiber reinforced boron modified phenolic resin(CF/BPR) composites and carbon fiber(CF) content and surface treatment were studied.
     从催化剂用量、反应时间和温度等方面研究了合成工艺条件对硼改性酚醛树脂(BPR)性能的影响,研究了碳纤维/硼改性酚醛树脂(CF/BPR)复合材料性能与碳纤维含量及其表面处理的关系.
短句来源
     Studies on Properties of Glass Fiber Reinforced Boron Modified Phenolic Resin Composites
     玻璃纤维增强硼改性酚醛树脂复合材料的性能
短句来源
     Synthesis and Properties of Boron Modified Phenolic Resin with Different Boron Content
     不同硼含量硼改性酚醛树脂的合成及其性能
短句来源
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The authors synthesized a new boron modified phenolic resin (named Presin) whose decomposition is started from 461℃, with the residue being 63% at700℃. Blending the P-resin with NBR as a matrix and using glass fiber as a reinforcement, a series of high friction factor material was made. The formulation, technological process and composite mechanism of the friction materials were also studied systematically. The results show that NBR at the level of 4~7% in 33% matrix gives a good toughness effect...

The authors synthesized a new boron modified phenolic resin (named Presin) whose decomposition is started from 461℃, with the residue being 63% at700℃. Blending the P-resin with NBR as a matrix and using glass fiber as a reinforcement, a series of high friction factor material was made. The formulation, technological process and composite mechanism of the friction materials were also studied systematically. The results show that NBR at the level of 4~7% in 33% matrix gives a good toughness effect and comprehensive properties. Thus, a 21% glass fiber non-asbestos friction material of clutch lining was prepared, its properties all meet the GB national standards and will be developed industrially.

本文选用热分解温度为461℃,700℃时残留物为63%的硼改性酚醛(P树脂)与丁腈橡胶共混后作为基体,以玻璃纤维作增强剂。对该体系制成的摩阻材料进行了配方、制备工艺及复合机理等较系统的研究。结果表明,在33%基体含量中,丁腈橡胶占4~7%时具有良好的增韧性及其它综合性能。含21%玻璃纤维的无石棉摩阻材料离合器片,其性能已符合国家标准,可以进行扩大生产。

The condensation copolymerization of boric acid triphenyl ester with phenol and formaldehyde was studied by means of the calculation of hydromethyl content,intrinsic viscosity and formaldehyde conversion.The results showed when KOH was used as catalyst,the condensation copolymerization took place,resulting in boron modified phenolic resin containing hydromethyl groups.The formaldehyde conversion,hydromethyl content and intrinsic viscosity...

The condensation copolymerization of boric acid triphenyl ester with phenol and formaldehyde was studied by means of the calculation of hydromethyl content,intrinsic viscosity and formaldehyde conversion.The results showed when KOH was used as catalyst,the condensation copolymerization took place,resulting in boron modified phenolic resin containing hydromethyl groups.The formaldehyde conversion,hydromethyl content and intrinsic viscosity of the resin were affected by reaction temperature,mixing ratio of reactants,catalyst content and reaction time:when the reaction temperature and time were 90℃ and 4h respectively,pH=9.6,the mixing ratio of boric acid triphenyl ester,formaldehyde and catalyst was 0.25:5.1:1,the hydromethyl content in the prepared resin was 24.1%,having a high molecular weight.

利用羟甲基含量、固有粘度的测定和甲醛转化率的计算 ,研究了硼酸三苯酯、苯酚与甲醛的缩合共聚反应。结果表明 :在KOH的催化作用下 ,硼酸苯酯、苯酚和甲醛水溶液能进行缩合共聚反应 ,生成含有羟甲基的硼改性酚醛树脂 ;甲醛的转化率、树脂中的羟甲基含量及树脂的固有粘度受反应温度、反应物配比、催化剂用量及反应时间的影响。在反应温度 90℃ ,体系的 pH =9.60 ,硼酸三苯酯与甲醛、苯酚的摩尔比为 0 .2 5∶5 .1∶1的条件下 ,反应 4h ,硼酚醛树脂中的羟甲基含量可以达到 2 4.1% ,并且有较高的分子量。

Boron-modified phenolic resin with fire-resistant was synthesized using NH 3 (pH=8~9) as catalyst and was characterized by IR, DSC and TGA. The factors influencing the synthesis were discussed and optimum reactions were determined as follows: phenol was 500mmol,n(phenol) ∶n(formaldehyde) ∶n(boric acid)=1 .0 ∶1 .5 ∶0.4, condensation temperature was 60℃~70℃, boro esterification temperature was 105℃~120℃. There was still the residual solid 75.3% of the sample at 700.8℃.

用硼酸改性酚醛树脂得耐高温耐烧灼热固性硼酚醛树脂 ,其结构经IR ,DSC ,TGA等表征。反应条件 :苯酚 5 0 0mmol,n (苯酚 )∶n (甲醛 )∶n (硼酸 ) =1∶1 .5∶0 .4,氨水 ( pH =8~ 9)作催化剂 ,缩合反应温度 60℃~70℃ ,硼酯化反应温度 1 0 5℃~ 1 2 0℃ ,同时在控制反应时间下脱水两次。所得产物在 70 0 .8℃下仍有 75 .3 %的固体残余物。

 
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