CN111521640B - 一种检测乙烯类单体是否变质的新方法 - Google Patents
一种检测乙烯类单体是否变质的新方法 Download PDFInfo
- Publication number
- CN111521640B CN111521640B CN202010306168.0A CN202010306168A CN111521640B CN 111521640 B CN111521640 B CN 111521640B CN 202010306168 A CN202010306168 A CN 202010306168A CN 111521640 B CN111521640 B CN 111521640B
- Authority
- CN
- China
- Prior art keywords
- temperature
- kettle
- sample
- solution
- deteriorated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000178 monomer Substances 0.000 title claims abstract description 37
- 239000005977 Ethylene Substances 0.000 title claims abstract description 16
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 7
- 239000003999 initiator Substances 0.000 claims abstract description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 6
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 25
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 25
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical group NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 19
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 19
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical group [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 14
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 14
- 239000012153 distilled water Substances 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 239000012295 chemical reaction liquid Substances 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 239000007800 oxidant agent Substances 0.000 claims description 2
- 229920000768 polyamine Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 abstract description 2
- IRLPACMLTUPBCL-KQYNXXCUSA-N 5'-adenylyl sulfate Chemical compound C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](COP(O)(=O)OS(O)(=O)=O)[C@@H](O)[C@H]1O IRLPACMLTUPBCL-KQYNXXCUSA-N 0.000 description 11
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 125000006297 carbonyl amino group Chemical group [H]N([*:2])C([*:1])=O 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003447 ipsilateral effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/48—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation
- G01N25/4873—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation for a flowing, e.g. gas sample
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/48—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation
- G01N25/4806—Details not adapted to a particular type of sample
- G01N25/4813—Details not adapted to a particular type of sample concerning the measuring means
- G01N25/482—Details not adapted to a particular type of sample concerning the measuring means concerning the temperature responsive elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/48—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation
- G01N25/4806—Details not adapted to a particular type of sample
- G01N25/4826—Details not adapted to a particular type of sample concerning the heating or cooling arrangements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
本发明涉及一种检测乙烯类单体是否变质的新方法。其技术方案是:包括以下过程,按质量百分比:首先,将乙烯类单体配置成浓度为10%‑50%的溶液,然后加入浓度为0.1%‑1%的引发剂,使其发生聚合反应,利用检测装置采集整个反应过程中的发热情况,通过对比标准样品和待测样品的反应釜内温度变化曲线来判定样品是否变质;有益效果是:乙烯类单体发生聚合反应时,在反应过程中会释放热量,这是聚合反应的特点,本发明是利用乙烯类单体自聚变质后,聚合反应放热会减少,通过对比标准样品和待测样品的反应放热情况来检测样品是否变质,该发明的检测设备结构简单,制造技术门槛低,设备便宜,易于推广,该发明的检测方法操作简单,检测精度高。
Description
技术领域
本发明涉及一种乙烯类单体的检测方法,特别涉及一种检测乙烯类单体是否变质的新方法。
背景技术
乙烯类单体是合成聚合物的重要原料,被广泛应用于石油、化工、医疗等行业,然而单体存在一定的活性,在自然储存条件下,会发生变质,如果单体变质,将会直接影响利用单体合成的聚合物的性能,甚至导致产品不合格,因此,乙烯类单体的质检尤为重要,对于大型化工厂而言,一般都建有专业的实验室,配套光谱仪和色谱仪,利用先进的设备进行质检,但对于小型化工厂而言,光谱和色谱设备价格过于昂贵,因此寻找一种成本低、检测准确度高的方法显得尤为重要。
发明内容
本发明的目的就是针对现有技术存在的上述缺陷,提供一种检测乙烯类单体是否变质的新方法,其成本低,检测精度高。
本发明提到的一种检测乙烯类单体是否变质的新方法,其技术方案是:包括以下过程,按质量百分比:
首先,将乙烯类单体配置成浓度为10%-50%的溶液,然后加入浓度为0.1%-1%的引发剂,使其发生聚合反应,利用检测装置采集整个反应过程中的发热情况,通过对比标准样品和待测样品的反应釜内温度变化曲线来判定样品是否变质;
所述检测装置包括恒温水浴锅(1)、夹套釜(2)、循环泵(3)、流量计(4)、热电偶(5)、搅拌机(6)、采集装置(7),所述恒温水浴锅(1)通过循环泵(3)和流量计(4)连接到夹套釜(2),在夹套釜(2)中设置搅拌机(6)、热电偶(5)和采集装置(7),利用恒温水浴锅(1)制备恒温热水,使用循环泵(3)为夹套釜(2)供应恒温热水,利用热电偶(5)采集夹套釜(2)内温度的变化,通过对比标准样品和待测样品夹套釜(2)内温度变化曲线来判定单体是否变质。
优选的,上述引发剂为氧化还原体系,氧化剂为过硫酸钠,还原剂为亚硫酸氢钠或多乙烯多胺。
优选的,环境温度设置为23℃,将恒温水浴温度设置为45℃到50℃,将循环泵排量设置为1.8L/min,将夹套釜(2)的搅拌机的搅拌速率设置为150rpm。
本发明提到的一种检测乙烯类单体是否变质的新方法,具体步骤如下:
1)将实验室环境温度设置为23℃,将恒温水浴温度设置为45℃,将循环泵排量设置为1.8L/min,将夹套釜的搅拌机的搅拌速率设置为150rpm;
2)将氢氧化钠、丙烯酸和蒸馏水配置成pH=6.5,丙烯酸质量分数为20%的溶液,向其中加入亚硫酸氢钠搅拌至溶解待用,且配置溶液时,先加入氢氧化钠,待溶液冷却后,再加入丙烯酸和亚硫酸氢钠,其中,亚硫酸氢钠的质量为丙烯酸质量的0.2%;
3)配置过硫酸钠溶液待用,过硫酸钠质量为丙烯酸质量的0.22%,蒸馏水为丙烯酸溶液中蒸馏水体积的5%;
4)打开泵循环,待恒温室水浴锅温度升至45℃,将丙烯酸溶液投入夹套釜,待夹套釜内反应液温度升至43℃,打开温度记录,投入过硫酸钠溶液;
5)分别测试标准样品和待测样品的反应釜内温度变化曲线,通过对比曲线判定样品是否变质。
本发明的有益效果是:乙烯类单体发生聚合反应时,在反应过程中会释放热量,这是聚合反应的特点,本发明是利用乙烯类单体自聚变质后,聚合反应放热会减少,通过对比标准样品和待测样品的反应放热情况来检测样品是否变质,该发明的检测设备结构简单,制造技术门槛低,设备便宜,易于推广,该发明的检测方法操作简单,检测精度高,易于形成企业独有的数据库。
附图说明
附图1是本发明的检测装置的结构示意图;
附图2是实施例1的标准样品和待测样品反应温度变化曲线对比图;
附图3是实施例2的标准样品和待测样品反应温度变化曲线对比图;
附图4是实施例3的标准样品和待测样品反应温度变化曲线对比图;
附图5是乙烯一元取代物的单体结构图;
附图6是乙烯二元同侧取代物单体结构图;
上图中:恒温水浴锅1、夹套釜2、循环泵3、流量计4、热电偶5、搅拌机6、采集装置7。
具体实施方式
以下结合附图对本发明的优选实施例进行说明,应当理解,此处所描述的优选实施例仅用于说明和解释本发明,并不用于限定本发明。
本发明主要针对乙烯一元取代物(如图5所示)和乙烯二元同侧取代物(如图6所示),其中R1和R2可以是但不限于COOH、CH2COOH、CONH2、CONHC(CH3)2CH2SO3H等基团。
实施例1:检测丙烯酸是否变质,步骤如下:
1)将实验室环境温度设置为23℃,将恒温水浴温度设置为45℃,将循环泵排量设置为1.8L/min(本装置夹套反应釜容积为1000ml,夹套容积为600ml),将夹套釜的搅拌机的搅拌速率设置为150rpm;
2)将氢氧化钠、丙烯酸和蒸馏水配置成pH=6.5,丙烯酸质量分数为20%的溶液,向其中加入亚硫酸氢钠搅拌至溶解待用(配置溶液时,先加入氢氧化钠,待溶液冷却后,再加入丙烯酸和亚硫酸氢钠,其中,亚硫酸氢钠的质量为丙烯酸质量的0.2%);
3)配置过硫酸钠溶液待用(过硫酸钠质量为丙烯酸质量的0.22%,蒸馏水为丙烯酸溶液中蒸馏水体积的5%);
4)打开泵循环,待恒温室水浴锅温度升至45℃,将丙烯酸溶液投入夹套反应釜,待夹套釜内反应液温度升至43℃,打开温度记录,投入过硫酸钠溶液;
5)分别测试标准样品和待测样品的反应釜内温度变化曲线,通过对比曲线判定样品是否变质;
检测对比结构参照附图2:
由于过硫酸钠溶液温度接近室温,投入过硫酸钠溶液后,反应液体系的温度会下降。随着夹套的循环加热(此时反应液温度低于夹套内水温),釜内温度开始上升,阻聚类杂质被逐渐消耗,引发剂开始作用,单体聚合并放出大量的热,随着反应的进行,单体慢慢被消耗,由于夹套的冷却作用(此时反应液温度高于夹套内水温),反应液温度开始降低。如图2所示,通过反应温度变化曲线可以看出,待测样品反应时放热明显减少,部分单体已发生自聚,待测的丙烯酸已经变质。
实施例2:检测AMPS是否变质,步骤如下:
1)将实验室环境温度设置为23℃,将恒温水浴温度设置为50℃,将循环泵排量设置为1.8L/min(本装置夹套反应釜容积为1000ml,夹套容积为600ml),将釜体搅拌速率设置为150rpm;
2)将氢氧化钠、AMPS和蒸馏水配置成pH=2.0,AMPS质量分数为25%的溶液,向其中加入四乙烯五胺搅拌至溶解待用(配置溶液时,先加入氢氧化钠,待溶液冷却后,再加入AMPS和四乙烯五胺,其中,四乙烯五胺的质量为AMPS质量的1%);
3)配置过硫酸钠溶液待用(过硫酸钠质量为AMPS质量的0.57%,蒸馏水为AMPS溶液中蒸馏水体积的5%);
4)打开泵循环,待恒温室水浴锅温度升至50℃,将AMPS溶液投入夹套反应釜,待夹套釜内反应液温度升至48℃,打开温度记录,投入过硫酸钠溶液;
5)分别测试标准样品和待测样品的反应釜内温度变化曲线,通过对比曲线判定样品是否变质;
检测对比:
如图3所示,通过反应温度变化曲线可以看出,待测样品和标准样品反应时放热曲线基本一致,由此可以判定待测AMPS样品未发生变质。
实施例3:同时检测AMPS、衣康酸、丙烯酸是否变质,步骤如下:
1)将实验室环境温度设置为23℃,将恒温水浴温度设置为50℃,将循环泵排量设置为1.8L/min(本装置夹套反应釜容积为1000ml,夹套容积为600ml),将釜体搅拌速率设置为150rpm;
2)将氢氧化钠、三种单体(三种单体分别为AMPS、衣康酸、丙烯酸,其中它们的摩尔比为40:30:30)和蒸馏水配置成pH=2.0,单体总质量分数为40%的溶液,向其中加入多乙烯多胺搅拌至溶解待用(配置溶液时,先加入氢氧化钠,待溶液冷却后,再加入单体和多乙烯多胺,其中,多乙烯多胺的质量为单体总质量的0.90%);
3)配置过硫酸钠溶液待用(过硫酸钠质量为单体总质量的0.50%,蒸馏水为单体溶液中蒸馏水体积的5%);
4)打开泵循环,待恒温室水浴锅温度升至50℃,将单体溶液投入夹套反应釜,待夹套釜内反应液温度升至48℃,打开温度记录,投入过硫酸钠溶液;
5)分别测试标准样品和待测样品的反应釜内温度变化曲线,通过对比曲线判定单体样品是否变质;
检测对比:
参照附图4,通过反应温度变化曲线可以看出,待测样品和标准样品反应时放热曲线基本一致,由此可以判定三种待测样品都未发生变质。
以上所述,仅是本发明的部分较佳实施例,任何熟悉本领域的技术人员均可能利用上述阐述的技术方案加以修改或将其修改为等同的技术方案。因此,依据本发明的技术方案所进行的任何简单修改或等同置换,尽属于本发明要求保护的范围。
Claims (4)
1.一种检测乙烯类单体是否变质的新方法,其特征是:包括以下过程,按质量百分比:
首先,将乙烯类单体配置成浓度为10%-50%的溶液,然后加入浓度为0.1%-1%的引发剂,使其发生聚合反应,利用检测装置采集整个反应过程中的发热情况,通过对比标准样品和待测样品的反应釜内温度变化曲线来判定样品是否变质;
所述检测装置包括恒温水浴锅(1)、夹套釜(2)、循环泵(3)、流量计(4)、热电偶(5)、搅拌机(6)、采集装置(7),所述恒温水浴锅(1)通过循环泵(3)和流量计(4)连接到夹套釜(2),在夹套釜(2)中设置搅拌机(6)、热电偶(5)和采集装置(7),利用恒温水浴锅(1)制备恒温热水,使用循环泵(3)为夹套釜(2)供应恒温热水,利用热电偶(5)采集夹套釜(2)内温度的变化,通过对比标准样品和待测样品夹套釜(2)内温度变化曲线来判定单体是否变质。
2.根据权利要求1所述的检测乙烯类单体是否变质的新方法,其特征是:所述引发剂为氧化还原体系,氧化剂为过硫酸钠,还原剂为亚硫酸氢钠、或多乙烯多胺。
3.根据权利要求1所述的检测乙烯类单体是否变质的新方法,其特征是:环境温度设置为23℃,将恒温水浴温度设置为45℃到50℃,将循环泵排量设置为1.8L/min,将夹套釜(2)的搅拌机的搅拌速率设置为150rpm。
4.根据权利要求1所述的检测乙烯类单体是否变质的新方法,其特征是:具体步骤如下:
1)将实验室环境温度设置为23℃,将恒温水浴温度设置为45℃,将循环泵排量设置为1.8L/min,将夹套釜的搅拌机的搅拌速率设置为150rpm;
2)将氢氧化钠、丙烯酸和蒸馏水配置成pH=6.5,丙烯酸质量分数为20%的溶液,向其中加入亚硫酸氢钠搅拌至溶解待用,且配置溶液时,先加入氢氧化钠,待溶液冷却后,再加入丙烯酸和亚硫酸氢钠,其中,亚硫酸氢钠的质量为丙烯酸质量的0.2%;
3)配置过硫酸钠溶液待用,过硫酸钠质量为丙烯酸质量的0.22%,蒸馏水为丙烯酸溶液中蒸馏水体积的5%;
4)打开泵循环,待恒温室水浴锅温度升至45℃,将丙烯酸溶液投入夹套釜,待夹套釜内反应液温度升至43℃,打开温度记录,投入过硫酸钠溶液;
5)分别测试标准样品和待测样品的反应釜内温度变化曲线,通过对比曲线判定样品是否变质。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010306168.0A CN111521640B (zh) | 2020-04-17 | 2020-04-17 | 一种检测乙烯类单体是否变质的新方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010306168.0A CN111521640B (zh) | 2020-04-17 | 2020-04-17 | 一种检测乙烯类单体是否变质的新方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN111521640A CN111521640A (zh) | 2020-08-11 |
CN111521640B true CN111521640B (zh) | 2022-11-08 |
Family
ID=71903128
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010306168.0A Active CN111521640B (zh) | 2020-04-17 | 2020-04-17 | 一种检测乙烯类单体是否变质的新方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111521640B (zh) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4226114A (en) * | 1978-03-18 | 1980-10-07 | Kali-Chemie Aktiengesellschaft | Method and apparatus for analysis of substances by change in enthalpy during dissolution |
CN1950699A (zh) * | 2004-04-28 | 2007-04-18 | 3M创新有限公司 | 监视三维样品聚合的方法 |
CN102520007A (zh) * | 2011-11-16 | 2012-06-27 | 中国人民解放军第三〇二医院 | 一种快速检测自发热制剂产品质量的方法 |
CN108535242A (zh) * | 2018-02-27 | 2018-09-14 | 江南大学 | 一种炸用油变质程度的快速联合检测装置及其检测方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11235332B2 (en) * | 2018-06-14 | 2022-02-01 | Ethicon, Inc. | Accelerated hydrolysis system |
-
2020
- 2020-04-17 CN CN202010306168.0A patent/CN111521640B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4226114A (en) * | 1978-03-18 | 1980-10-07 | Kali-Chemie Aktiengesellschaft | Method and apparatus for analysis of substances by change in enthalpy during dissolution |
CN1950699A (zh) * | 2004-04-28 | 2007-04-18 | 3M创新有限公司 | 监视三维样品聚合的方法 |
CN102520007A (zh) * | 2011-11-16 | 2012-06-27 | 中国人民解放军第三〇二医院 | 一种快速检测自发热制剂产品质量的方法 |
CN108535242A (zh) * | 2018-02-27 | 2018-09-14 | 江南大学 | 一种炸用油变质程度的快速联合检测装置及其检测方法 |
Non-Patent Citations (2)
Title |
---|
Performance deterioration and recovery in high-temperature polymer electrolyte membrane fuel cells: Effects of deliquescence of phosphoric acid;Hyanjoo Park 等;《International Journal of Hydrogen Energy》;20200328;第45卷;第32844-32855页 * |
几种烯类单体快速乳液聚合动力学研究;黄亮兵;《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》;中国学术期刊(光盘版)电子杂志社;20140615(第06期);第B014-78页 * |
Also Published As
Publication number | Publication date |
---|---|
CN111521640A (zh) | 2020-08-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Winnik | Fluorescence studies of aqueous solutions of poly (N-isopropylacrylamide) below and above their LCST | |
Cicek et al. | Immobilization of α‐chymotrypsin in thermally reversible isopropylacrylamide‐hydroxyethylmethacrylate copolymer gel | |
JP4848735B2 (ja) | 重合性イミダゾール塩の電気化学ディバイス用重合体 | |
CN109971101B (zh) | 一种双网络水凝胶及其制备方法和应用 | |
JP2000143727A (ja) | ポリテトラフルオロエチレン樹脂 | |
CN108059693A (zh) | 一种多重氢键增强的温敏型物理水凝胶的制备方法 | |
CN115232242B (zh) | 一种水下高强度离子凝胶及其制备方法与应用 | |
EP1006129B1 (en) | Process for polymerizing tetrafluoroethylene | |
CN112029057B (zh) | 一种亲水改性聚偏氟乙烯嵌段共聚物、水处理膜及其制备方法和应用 | |
CN111521640B (zh) | 一种检测乙烯类单体是否变质的新方法 | |
Kaya et al. | Direct test of the critical exponents at the sol-gel transition | |
CN114031704B (zh) | 一种偏氟乙烯聚合物及其制备方法和应用 | |
Cioffi et al. | Rheokinetics of linear polymerization. A literature review | |
Huang et al. | Facile synthesis of highly branched poly (acrylonitrile-co-vinyl acetate) s with low viscosity and high thermal stability via radical aqueous solution polymerization | |
CN105037609B (zh) | 一种甲基丙烯酸甲酯聚合物的制备方法 | |
Kim et al. | Polymerization of acrylamide with diffusion-controlled termination | |
JP3028964B2 (ja) | 高強度・伸度を有する四フッ化エチレン―エチレン系共重合体の製造方法 | |
CN103788234B (zh) | 一种助分散剂及其制备方法 | |
CN114044852B (zh) | 一种可聚合低共熔溶剂、导电弹性体及其制备方法 | |
Jin et al. | Hydrodynamic fluorescence emission behavior of molecular rotor-based vinyl polymers used as viscosity sensors | |
Cristallini et al. | Kinetics and reaction mechanism of template polymerization investigated by conductimetric measurements. 2. Radical polymerization of sodium methacrylate in the presence of poly (allylamine) hydrochloride | |
Bai et al. | A synthetic approach for water soluble hyperbranched poly (N, N-ethylidenebis (N-2-chloroacetyl acrylamide)) with high degree of branching via atom transfer radical polymerization/self-condensing vinyl polymerization | |
CN110938173A (zh) | 互穿网络结构水凝胶及其制备方法 | |
JPH01167307A (ja) | 塩素化塩化ビニル−ビニル成分系共重合体 | |
WO2001029098A2 (en) | Method and kit for the manufacture of separation gels |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A new method for detecting whether ethylene monomers have deteriorated Granted publication date: 20221108 Pledgee: Dongying Branch of Qilu Bank Co.,Ltd. Pledgor: Shandong Obiton Petroleum Technology Co.,Ltd. Registration number: Y2024980007908 |
|
PE01 | Entry into force of the registration of the contract for pledge of patent right |