CN116426100A - 一种耐温型可降解泡沫材料 - Google Patents
一种耐温型可降解泡沫材料 Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 22
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 22
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- 238000006243 chemical reaction Methods 0.000 claims description 33
- 238000010438 heat treatment Methods 0.000 claims description 33
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- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 claims description 26
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 claims description 26
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- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
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Abstract
一种耐温型可降解泡沫材料,属于泡沫材料技术领域。其特征在于,原料重量份组成包括:PPCP30~70份、PBS35~80份、PCL和/或PBAT0~30份、成核剂0~3份。本发明为半芳香族二氧化碳基共聚物与PBS共混发泡材料,PPCP本身的耐温定好、阻水阻气性强,本发明将其与按一定比例PBS搭配使用制得发泡材料。在两者协同配合下,本发明发泡材料阻气阻水性好、耐水性好,可以用于包装含水或潮湿的货物。本发泡材料的发泡倍率可以达到40~50倍,热变形温度达到80℃以上,满足集装箱海上运输的要求。
Description
技术领域
本发明属于泡沫材料技术领域,具体涉及一种二氧化碳基耐温型可降解泡沫材料。
背景技术
聚苯乙烯泡沫(EPS)是一种轻型高分子聚合物。它是采用聚苯乙烯树脂加入发泡剂,同时加热进行软化并产生气体,形成一种硬质闭孔结构的泡沫塑料。但是发泡EPS珠粒之间的粘接性差,珠粒发泡后,发泡板在受到挤压、摔打时容易脱粒,清理过程中因为静电吸附很难清理。更主要的EPS是一种不可降解材料,在使用后若被抛弃,会造成环境污染,随着各国环境意识的加强,EPS发泡材料必然被逐渐放弃使用。
传统的可降解生物基发泡材料以PLA为主,但是因为PLA耐热性差、熔体强度低,在50℃~55℃就会变形,应用领域和适用范围受到很大限制。导致PLA发泡材料还无法代替EPS,无法满足应用。如中国专利CN113214618B公开了一种食品级耐热PLA发泡材料,通过使用可生物降解的助溶剂,将聚乳酸(PLA)和己二酸丁二醇酯与对苯二甲酸丁二醇酯的缩聚物(PBAT)共混得到PLA/PBAT合金;然后使用经过聚合的氨基酸对蒙脱土(MMT)进行插层处理得到有机蒙脱土;最后使用PLA/PBAT合金和有机蒙脱土混合挤出并进行发泡。尽管其使用聚合的氨基酸作为插层剂,实现了MMT在PLA/PBAT合金中的均匀分散,提高了PLA的熔体强度和热变形温度,但是其热变形温度也仅仅在50℃~58℃之间。而海上的集装箱运输时,集装箱内的温度能达到接近70℃,显然PLA发泡材料还无法满足包装要求。
中国专利CN115819740A还公开了一种PGA发泡材料,通过PGA共聚物和异氰酸酯制备而成。该方法通过组分调节可以使得材料的熔点达到100℃以上。但是该PGA发泡材料降解速度过快,功能期太短。无法满足发泡包装的长距离运输要求。
发明内容
本发明要解决的技术问题是:克服现有技术的不足,提供发泡倍率高、功能期长的耐温型可降解泡沫材料。
本发明解决其技术问题所采用的技术方案是:耐温型可降解泡沫材料,其特征在于,原料重量份组成包括:PPCP30~70份、PBS35~80份、PCL和/或PBAT5~30份、成核剂0~3份。
本发明为半芳香族二氧化碳基共聚物与PBS共混发泡材料,PPCP本身的耐温定好、阻水阻气性强,本发明将其与按一定比例PBS搭配使用制得发泡材料。在两者协同配合下,本发明发泡材料阻气阻水性好、耐水性好,可以用于包装含水或潮湿的货物。本发泡材料的发泡倍率可以达到40~50倍,热变形温度达到70℃~80℃,满足集装箱海上运输的要求。本发明发泡材料的物理性能优异,强度高、韧性好、抗冲击性能优异。本发明的泡沫材料,若经过珠粒发泡,制成的板材,珠粒间粘结力强,不会出现脱粒情况,使用安全、环保。
本发泡材料在掩埋后能够较快速的实现生物降解,但是在空气环境下具有较长时间的功能期,适合作为减震包装材料。
优选的,上述耐温型可降解泡沫材料,所述的原料重量份组成包括:PPCP40~55份、PBS45~60份、PCL8~20份、PBAT5~10份、成核剂0~1.5份。优选的重量份组成对PPCP、PBS两个主要组分进一步的优化,同时对改性组分的用量进行的优选,优选的组成下材料的发泡倍率和耐热性能达到本发明最佳,例如PPS本身软化温度较高,本发明控制PBS的用量并用其他组分调整后,不但材料尺寸稳定性更好,且能保持热变形温度不低于75℃;配合其它改性组分,加工性能也更优。
本发明的半芳香族二氧化碳基共聚物中加入适量PBS共混改性,能引入适量的结晶点,使发泡尺寸稳定、均一,本发明的主物料能够彻底改善、解决PBS本身耐水性不足、难以发泡的问题。选用的聚己内酯(PCL)是线型脂肪族聚酯,是一种半结晶型高分子,本发明中适量加入后,能使得材料的热稳定性较好。
优选的,上述耐温型可降解泡沫材料,所述的原料重量份组成还包括:PPCCP3~15份。所述的PPCCP为二氧化碳、环氧丙烷、环氧环己烷和邻苯二甲酸酐的四元共聚物,PPCP和PBS中加入少量的PPCCP能够增强两者的相容性,将两者的性能有机的结合起来,使的本发泡材料的耐热性、耐水性更好。
优选的,上述耐温型可降解泡沫材料,所述的PPCP为二氧化碳、环氧丙烷和邻苯二甲酸酐的三元无规共聚物。PPCP优选为无规共聚物,相对于嵌段共聚的PPCP等,无规共聚的PPCP表现出更好的发泡性能,发泡倍率更高。
优选的,上述耐温型可降解泡沫材料,所述的PPCP的制备工艺为:将环氧丙烷、邻苯二甲酸酐和非金属催化剂一次性投入到反应釜内,环氧丙烷与邻苯二甲酸酐的摩尔比为11~15:1,环氧丙烷与非金属催化剂的摩尔比2000~2500:1;将釜内温度升温至60℃~80℃;充入二氧化碳至反应压力达到1.0MPa~2.0MPa进行三元共聚反应,环氧丙烷完全反应后终止反应得到胶液;经洗涤、脱挥后得到三元共聚物PPCP。本发明提供一种制备无规共聚PPCP的一次性投料工艺,物料配比中降低了邻苯二甲酸酐的用量,通过工艺条件和催化剂控制,所得的无规共聚PPCP的分子量作为发泡材料适用于发泡工艺,得的PPCP对发泡剂的吸收性更好,同时具有良好的耐水、耐热性能,能够与PBS良好的相容。本发明无规共聚的半芳香族二氧化碳基三元共聚物,本身不结晶,容易形成泡沫结构,容易乳化成核。所得PPCP粘结性更好,珠粒发泡后,珠粒间粘接强度更高。
所述的非金属催化剂为路易斯酸、碱对,所述路易斯酸包括三乙基硼、三丙基硼、三丁基硼、三苯基硼,进一步优选地,三乙基硼。所述路易斯碱包括四正丁基卤(氟、氯、溴、碘)化铵,进一步优选地,四正丁基氯化铵、四正丁基溴化铵。使用非金属催化剂,PPCP中没有金属残留,适合作为食品的抗震包装。
所述的非金属催化剂为四正丁基卤化铵与三乙基硼的摩尔比为1:1~5;进一步优选地,四正丁基卤化铵与三乙基硼的摩尔比为1:2~3。优选的催化剂的催化效率对本发明的上述PPCP一次投料工艺更加适应,与其他工艺条件配合得到适合作为发泡材料的分子量,制得PPCP的分子量分布更窄,材料性能更稳定。
优选的,上述耐温型可降解泡沫材料,制备工艺为:
1)将所述原料分别计量后干燥,干燥物料置于混料机中混合均匀得到混料,然后将混料加入挤出机挤出造粒,得到粒料;将粒料在发泡剂浸渍液中充分浸渍得到预发泡料;
2)将预发泡料转移至发泡桶内加热发泡,发泡后的发泡料转移到流化床内熟化得到熟化料;熟化料转移至成型板机内加热为发泡板材。
本发明材料的发泡效果优异,加工性能良好,对加工工艺本身要求不高,能够适应现行的大部分发泡工艺。只需针对发泡剂做出相应的调整即可。
优选的,上述制备工艺,步骤1)中所述挤出机的挤出温度为120℃~195℃,机头温度为185℃,其中成核剂为物理发泡成核剂。优选的基础温度下,原料达到的流动状态制成的颗粒适合进行发泡工艺,在发泡剂中浸渍能过够良好进行的吸收,发泡后,珠粒表面光滑五裂缝、颗粒饱满圆润,形态均一。其中所述的物理发泡成核剂可以选用苏州汉诺材料科技有限公司的80-FT-PE、广州市本奇新材料有限公司的NS-115或美国陶氏集团的DFNA-0012NT。
本发明中含氟发泡剂可以使用传统的CFCs、HCFCs和HFCs,能够得到较大倍率的发泡,但是考虑到环境因素,选用氢氟醚类(HFEs)和氢氟烯烃类(HFOs),环境友好,降解速率快、生物毒性低、发泡效率高。发泡剂的浸渍混合量指材料在浸渍后的质量增加量,即浸渍后的质量与浸渍前的质量的差值,具体的浸渍混合量需要通过温度时间等进行控制。
优选的,上述制备工艺,步骤1)中所述的发泡剂为HFEs或HFOs,发泡剂的浸渍混合量为粒料的3wt%~8wt%;浸渍温度30℃~45℃,浸渍时间为3h~8h。本发明材料的发泡倍率高,相较于EPS等材料可以使用更少的发泡剂,HFEs或HFOs对本发明材料的浸渍渗透性好,能够使本发明材料良好的发泡。
优选的,上述制备工艺,步骤1)中所述的发泡剂为液态CO2,发泡剂的浸渍混合量为粒料的1.3wt%~2.8wt%;浸渍时间为0.5h~1.5h。本发明的主要材料即半芳香族二氧化碳基共聚物,在液态CO2中的浸渍效果更佳,浸渍效率高,能够实现良好的发泡。
优选的,上述制备工艺,步骤1)中所述的发泡剂为戊烷,发泡剂的浸渍混合量为复合材料的1%~3%;浸渍温度30℃~45℃,浸渍时间为2h~4h。戊烷为最传统的发泡剂,应用技术成熟,工艺简单、成本低。
与现有技术相比,本发明的一种耐温型可降解泡沫材料具有以下有益效果:本发明将耐温定好、阻水阻气性强的PPC与PBS搭配使用,在两者协同配合下,本发明发泡材料阻气阻水性好、耐水性好,发泡倍率可以达到40~50倍,热变形温度达到80℃以上,满足集装箱海上运输的要求。本发泡材料在掩埋后能够较快速的实现生物降解,但是在空气环境下具有较长时间的功能期,适合作为减震包装材料。
具体实施方式
下面通过实施例对本发明进行具体描述。如果没有其它说明,所用原料都是市售得到的。实施例中HCF在本文中作为 统称用于指代1,1,1-三氟-3-氯-丙烯
实施例1
制备无规PPCP:将环氧丙烷、邻苯二甲酸酐和非金属催化剂一次性投入到反应釜内,环氧丙烷与邻苯二甲酸酐的摩尔比为13:1,环氧丙烷与非金属催化剂的摩尔比2200:1,非金属催化剂为四正丁基氯化铵与三乙基硼的摩尔比为1:2.5;将釜内温度升温至70℃;充入二氧化碳至反应压力达到1.5MPa进行三元共聚反应,环氧丙烷完全反应后终止反应得到胶液;经洗涤、脱挥后即得。
1)原料按重量份PPCP45份、PBS55份、PPCCP8份、PCL15份、PBAT8份、80-FT-PE1.0份备料后干燥,干燥物料置于混料机中混合均匀得到混料,然后将混料加入挤出机挤出造粒,得到粒料,挤出机的挤出温度为2区120℃、3区120℃、4区175℃、5区185℃、6~9区195℃,机头温度为185℃;将粒料在HFOs浸渍液中浸渍浸,渍温度40℃,浸渍时间为4h,得到预发泡料,称重计算浸渍混合量为粒料的6wt%;
2)将预发泡料转移至发泡桶内加热至120℃发泡,发泡后的发泡料转移到流化床内利用鼓入的60℃的热空气熟化90min得到熟化料;熟化尺寸稳定后发泡倍率为49倍;熟化料转移至成型板机内加热至110℃成型为发泡板材。
实施例2
制备无规PPCP:将环氧丙烷、邻苯二甲酸酐和非金属催化剂一次性投入到反应釜内,环氧丙烷与邻苯二甲酸酐的摩尔比为13:1,环氧丙烷与非金属催化剂的摩尔比2200:1,非金属催化剂为四正丁基氯化铵与三乙基硼的摩尔比为1:2.5;将釜内温度升温至70℃;充入二氧化碳至反应压力达到1.5MPa进行三元共聚反应,环氧丙烷完全反应后终止反应得到胶液;经洗涤、脱挥后即得。
1)原料按重量份PPCP40份、PBS60份、PPCCP3份、PCL20份、PBAT5份、NS-115 0.5份备料后干燥,干燥物料置于混料机中混合均匀得到混料,然后将混料加入挤出机挤出造粒,得到粒料,挤出机的挤出温度为2区120℃、3区120℃、4区175℃、5区180℃、6~9区190℃,机头温度为185℃;将粒料在液态CO2中浸渍中,浸渍时间为0.5h,发泡剂的浸渍混合量为粒料的2.0wt%。
2)将预发泡料转移至发泡桶内加热至125℃发泡,发泡后的发泡料转移到流化床内利用鼓入的65℃的热空气熟化70min得到熟化料;熟化尺寸稳定后发泡倍率为41倍;熟化料转移至成型板机内加热至115℃成型为发泡板材。
实施例3
制备无规PPCP:将环氧丙烷、邻苯二甲酸酐和非金属催化剂一次性投入到反应釜内,环氧丙烷与邻苯二甲酸酐的摩尔比为13:1,环氧丙烷与非金属催化剂的摩尔比2200:1,非金属催化剂为四正丁基氯化铵与三乙基硼的摩尔比为1:2.5;将釜内温度升温至70℃;充入二氧化碳至反应压力达到1.5MPa进行三元共聚反应,环氧丙烷完全反应后终止反应得到胶液;经洗涤、脱挥后即得。
1)原料按重量份PPCP55份、PBS45份、PPCCP15份、PCL8份、PBAT10份、DFNA-0012NT1.5份备料后干燥,干燥物料置于混料机中混合均匀得到混料,然后将混料加入挤出机挤出造粒,得到粒料,挤出机的挤出温度为2区120℃、3区120℃、4区175℃、5区185℃、6~9区195℃,机头温度为185℃;将粒料在HFEs浸渍液中浸渍,浸渍温度45℃,浸渍时间为3h,得到预发泡料,称重计算浸渍混合量为粒料的3wt%。
2)将预发泡料转移至发泡桶内加热至120℃发泡,发泡后的发泡料转移到流化床内利用鼓入的60℃的热空气熟化90min得到熟化料;熟化尺寸稳定后发泡倍率为43倍;熟化料转移至成型板机内加热至110℃成型为发泡板材。
实施例4
制备无规PPCP:将环氧丙烷、邻苯二甲酸酐和非金属催化剂一次性投入到反应釜内,环氧丙烷与邻苯二甲酸酐的摩尔比为11:1,环氧丙烷与非金属催化剂的摩尔比2500:1,非金属催化剂为四正丁基溴化铵与三乙基硼的摩尔比为1:3;将釜内温度升温至80℃;充入二氧化碳至反应压力达到2.0MPa进行三元共聚反应,环氧丙烷完全反应后终止反应得到胶液;经洗涤、脱挥后即得。
1)原料按重量份PPCP30份、PBS80份、PPCCP3份,PCL5份、NS-115 3份备料后干燥,干燥物料置于混料机中混合均匀得到混料,然后将混料加入挤出机挤出造粒,得到粒料,挤出机的挤出温度为2区120℃、3区120℃、4区175℃、5区185℃、6~9区195℃,机头温度为185℃;将粒料在HFOs浸渍液中浸渍,浸渍温度30℃,浸渍时间为8h,得到预发泡料,称重计算浸渍混合量为粒料的8wt%。
2)将预发泡料转移至发泡桶内加热至120℃发泡,发泡后的发泡料转移到流化床内利用鼓入的60℃的热空气熟化90min得到熟化料;熟化尺寸稳定后发泡倍率为51倍;熟化料转移至成型板机内加热至110℃成型为发泡板材。
实施例5
制备无规PPCP:将环氧丙烷、邻苯二甲酸酐和非金属催化剂一次性投入到反应釜内,环氧丙烷与邻苯二甲酸酐的摩尔比为15:1,环氧丙烷与非金属催化剂的摩尔比2000:1,非金属催化剂为四丙基氯化铵与三丁基硼的摩尔比为1:2;将釜内温度升温至60℃;充入二氧化碳至反应压力达到1.0MPa进行三元共聚反应,环氧丙烷完全反应后终止反应得到胶液;经洗涤、脱挥后即得。
1)原料按重量份PPCP70份、PBS35份、PPCCP15份,PCL15份、PBAT15份备料后干燥,干燥物料置于混料机中混合均匀得到混料,然后将混料加入挤出机挤出造粒,得到粒料,挤出机的挤出温度为2区120℃、3区120℃、4区170℃、5区180℃、6~9区190℃,机头温度为185℃;将粒料在液态CO2浸渍,浸渍时间为1.5h,浸渍混合量为粒料的2.8wt%。
2)将预发泡料转移至发泡桶内加热至117℃发泡,发泡后的发泡料转移到流化床内利用鼓入的55℃的热空气熟化90min得到熟化料;熟化尺寸稳定后发泡倍率为43倍;熟化料转移至成型板机内加热至105℃成型为发泡板材。
实施例6
制备无规PPCP:将环氧丙烷、邻苯二甲酸酐和非金属催化剂一次性投入到反应釜内,环氧丙烷与邻苯二甲酸酐的摩尔比为13:1,环氧丙烷与非金属催化剂的摩尔比2200:1,非金属催化剂为四正丁基氯化铵与三乙基硼的摩尔比为1:2.5;将釜内温度升温至70℃;充入二氧化碳至反应压力达到1.5MPa进行三元共聚反应,环氧丙烷完全反应后终止反应得到胶液;经洗涤、脱挥后即得。
1)原料按重量份PPCP45份、PBS55份、PCL15份、PBAT8份、80-FT-PE 1.0份备料后干燥,干燥物料置于混料机中混合均匀得到混料,然后将混料加入挤出机挤出造粒,得到粒料,挤出机的挤出温度为2区120℃、3区120℃、4区175℃、5区185℃、6~9区195℃,机头温度为185℃;将粒料在HFOs浸渍液中浸渍浸,渍温度40℃,浸渍时间为4h,得到预发泡料,称重计算浸渍混合量为粒料的6wt%;
2)将预发泡料转移至发泡桶内加热至120℃发泡,发泡后的发泡料转移到流化床内利用鼓入的60℃的热空气熟化90min得到熟化料;熟化尺寸稳定后发泡倍率为46倍;熟化料转移至成型板机内加热至110℃成型为发泡板材。
实施例7
制备无规PPCP:将环氧丙烷、邻苯二甲酸酐和非金属催化剂一次性投入到反应釜内,环氧丙烷与邻苯二甲酸酐的摩尔比为8:1,环氧丙烷与非金属催化剂的摩尔比1500:1,非金属催化剂为四正丁基氯化铵与三乙基硼的摩尔比为1:5;将釜内温度升温至70℃;充入二氧化碳至反应压力达到1.5MPa进行三元共聚反应,环氧丙烷完全反应后终止反应得到胶液;经洗涤、脱挥后即得。
1)原料按重量份PPCP45份、PBS55份、PPCCP8份、PCL15份、PBAT8份、80-FT-PE1.0份备料后干燥,干燥物料置于混料机中混合均匀得到混料,然后将混料加入挤出机挤出造粒,得到粒料,挤出机的挤出温度为2区120℃、3区120℃、4区175℃、5区185℃、6~9区195℃,机头温度为185℃;将粒料在HFOs浸渍液中浸渍浸,渍温度40℃,浸渍时间为4h,得到预发泡料,称重计算浸渍混合量为粒料的6wt%;
2)将预发泡料转移至发泡桶内加热至120℃发泡,发泡后的发泡料转移到流化床内利用鼓入的60℃的热空气熟化90min得到熟化料;熟化尺寸稳定后发泡倍率为45倍;熟化料转移至成型板机内加热至110℃成型为发泡板材。
实施例8
制备无规PPCP:将环氧丙烷、邻苯二甲酸酐和非金属催化剂一次性投入到反应釜内,环氧丙烷与邻苯二甲酸酐的摩尔比为13:1,环氧丙烷与非金属催化剂的摩尔比2200:1,非金属催化剂为四正丁基溴化铵与三丙基硼的摩尔比为1:1;将釜内温度升温至70℃;充入二氧化碳至反应压力达到1.5MPa进行三元共聚反应,环氧丙烷完全反应后终止反应得到胶液;经洗涤、脱挥后即得。
1)原料按重量份PPCP30份、PBS80份、PBAT5份备料后干燥,干燥物料置于混料机中混合均匀得到混料,然后将混料加入挤出机挤出造粒,得到粒料,挤出机的挤出温度为2区120℃、3区120℃、4区175℃、5区185℃、6~9区195℃,机头温度为185℃;将粒料在戊烷中浸渍,浸渍温度30℃,浸渍时间为2h,称重计算浸渍混合量为粒料的1%;
2)将预发泡料转移至发泡桶内加热至120℃发泡,发泡后的发泡料转移到流化床内利用鼓入的60℃的热空气熟化90min得到熟化料;熟化尺寸稳定后发泡倍率为40倍;熟化料转移至成型板机内加热至110℃成型为发泡板材。
实施例9
制备无规PPCP:将环氧丙烷、邻苯二甲酸酐和非金属催化剂一次性投入到反应釜内,环氧丙烷与邻苯二甲酸酐的摩尔比为8:1,环氧丙烷与非金属催化剂的摩尔比1500:1,非金属催化剂为四正丁基氯化铵与三乙基硼的摩尔比为1:5;将釜内温度升温至70℃;充入二氧化碳至反应压力达到1.5MPa进行三元共聚反应,环氧丙烷完全反应后终止反应得到胶液;经洗涤、脱挥后即得。
1)原料按重量份PPCP70份、PBS35份、PCL20份、PBAT10份、NS-115 3份备料后干燥,干燥物料置于混料机中混合均匀得到混料,然后将混料加入挤出机挤出造粒,得到粒料,挤出机的挤出温度为2区120℃、3区120℃、4区175℃、5区185℃、6~9区195℃,机头温度为185℃;将粒料在戊烷浸渍,浸渍温度45℃,浸渍时间为4h,称重计算浸渍混合量为粒料的3%;
2)将预发泡料转移至发泡桶内加热至120℃发泡,发泡后的发泡料转移到流化床内利用鼓入的60℃的热空气熟化90min得到熟化料;熟化尺寸稳定后发泡倍率为43倍;熟化料转移至成型板机内加热至110℃成型为发泡板材。
各实施例的性能测试结果见表1,其中耐水性为将样品置于25℃的水中浸泡12h后,烘干后的质量损失率。尺寸稳定性按照GB/T 8811-2008试验。脱粒率指将1dm3的立方体样品,顶部放置0.5kg的砝码后在摩擦系数0.2的松木板上拖行10m后的质量损失率。
表1 性能测试结果
耐水性% | 软化温度℃ | 尺寸稳定性% | 断裂弯曲负荷N | 脱粒率% | 邵尔A硬度 | 压缩强度kPa | |
实施例1 | 0.63 | 76.3 | 0.92 | 89 | 1.8 | 56 | 167 |
实施例2 | 0.67 | 75.7 | 0.96 | 82 | 2.1 | 55 | 163 |
实施例3 | 0.71 | 76.4 | 0.94 | 84 | 2.0 | 56 | 165 |
实施例4 | 0.94 | 79.8 | 1.23 | 76 | 1.8 | 58 | 165 |
实施例5 | 0.66 | 75.1 | 1.12 | 74 | 2.4 | 53 | 154 |
实施例6 | 0.65 | 73.5 | 0.94 | 85 | 2.1 | 54 | 165 |
实施例7 | 0.68 | 76.6 | 0.95 | 80 | 2.6 | 57 | 164 |
实施例8 | 0.71 | 71.3 | 1.07 | 79 | 2.7 | 55 | 158 |
实施例9 | 1.1% | 70.3 | 1.39 | 65 | 3.1 | 48 | 132 |
以上所述,仅是本发明的较佳实施例而已,并非是对本发明作其它形式的限制,任何熟悉本专业的技术人员可能利用上述揭示的技术内容加以变更或改型为等同变化的等效实施例。但是凡是未脱离本发明技术方案内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与改型,仍属于本发明技术方案的保护范围。
Claims (10)
1.一种耐温型可降解泡沫材料,其特征在于,原料重量份组成包括:PPCP30~70份、PBS35~80份、PCL和/或PBAT0~30份、成核剂0~3份。
2.根据权利要求1所述一种耐温型可降解泡沫材料,其特征在于,所述的原料重量份组成包括:PPCP40~55份、PBS45~60份、PCL8~20份、PBAT5~10份、成核剂0~1.5份。
3.根据权利要求1或2所述一种耐温型可降解泡沫材料,其特征在于:所述的原料重量份组成还包括:PPCCP3~15份。
4.根据权利要求1或2所述一种耐温型可降解泡沫材料,其特征在于,所述的PPCP为二氧化碳、环氧丙烷和邻苯二甲酸酐的三元无规共聚物。
5.根据权利要求4所述一种耐温型可降解泡沫材料,其特征在于,所述的PPCP的制备工艺为:将环氧丙烷、邻苯二甲酸酐和非金属催化剂一次性投入到反应釜内,环氧丙烷与邻苯二甲酸酐的摩尔比为11~15:1,环氧丙烷与非金属催化剂的摩尔比2000~2500:1;将釜内温度升温至60℃~80℃;充入二氧化碳至反应压力达到1.0MPa~2.0MPa进行三元共聚反应,环氧丙烷完全反应后终止反应得到胶液;经洗涤、脱挥后得到三元共聚物PPCP。
6.根据权利要求1或2所述一种耐温型可降解泡沫材料,其特征在于,制备工艺为:
1)将所述原料分别计量后干燥,干燥物料置于混料机中混合均匀得到混料,然后将混料加入挤出机挤出造粒,得到粒料;将粒料在发泡剂浸渍液中充分浸渍得到预发泡料;
2)将预发泡料转移至发泡桶内加热发泡,发泡后的发泡料转移到流化床内熟化得到熟化料;熟化料转移至成型板机内加热为发泡板材。
7.根据权利要求6所述一种耐温型可降解泡沫材料,其特征在于,步骤1)中所述挤出机的挤出温度为100℃~185℃,机头温度为180℃,其中成核剂为物理发泡成核剂。
8.根据权利要求6所述一种耐温型可降解泡沫材料,其特征在于:步骤1)中所述的发泡剂为HFEs或HFOs,发泡剂的浸渍混合量为粒料的3wt%~8wt%;浸渍温度30℃~45℃,浸渍时间为3h~8h。
9.根据权利要求6所述一种耐温型可降解泡沫材料,其特征在于:步骤1)中所述的发泡剂为液态CO2,发泡剂的浸渍混合量为粒料的1.3wt%~2.8wt%;浸渍时间为0.5h~1.5h。
10.根据权利要求6所述一种耐温型可降解泡沫材料,其特征在于,步骤1)中所述的发泡剂为戊烷,发泡剂的注入量为复合材料的1%~3%;浸渍温度30℃~45℃,浸渍时间为2h~4h。
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