CN111205528A - 一种高黏弹柔性板及其制备方法 - Google Patents
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Abstract
本发明公开了一种高黏弹柔性板及其制备方法。包括如下重量份数的原料:合成橡胶20‑30份、聚氯乙烯10‑25份、填料10‑20份、发泡剂3‑6份、阻燃剂5‑8份、橡胶促进剂2‑4份。本发明采用的合成橡胶组分,发泡剂组分,橡胶促进剂组分均采用混合组分,组分之间均有显著的协同增效功效,这3种组分在功能上相互支持,补充各自所产生的缺陷,最终使得制备的产品既能保持较高的强度和表观密度,又能保持较高的压缩回弹率。
Description
技术领域
本发明属于建筑材料技术领域,具体涉及一种高黏弹性材料及其制备方法。
背景技术
隧道,桥梁等内部使用的材料需要考虑降噪,提高强度,阻燃等,所使用的软衬柔性材料还要考虑其密度,吸水率,压缩回弹率等。
采用橡塑共混材料,赋予了材料以较好的弹塑性、柔韧性、收缩变形率小等优良性能,这些性能在机械设备的减震方面起着积极的作用,能够使材料实现真正意义的减震降噪效果。为了提高橡塑共混材料的弹性,一般采用加入橡胶促进剂促进材料的交联,以及加入发泡剂,但是,加入发泡剂会降低材料密度,降低其力学性能,降低材料的强度,目前制备的橡塑共混材料,其密度普遍在120kg/m3,其弹性较好,但强度不高;若不加发泡剂,增加强度,则材料的压缩回弹率低,抗震性能下降,因此,选择合适的发泡剂,橡胶促进剂和橡塑共混材料的组合,达到最佳的弹性和强度,是一个急需解决的问题。
传统在制备柔性板的工艺中,在双辊混炼机混炼后,进行一次模压,加热共混胶,橡胶边交联同时发泡剂也边分解,交联达到一定程度时再冷却,取出发泡材料,硫化加热过程中压力变化较大,发泡材料易变形开裂,制备的柔性板强度和弹性均不高。
发明内容
本发明的目的在于提供一种高黏弹柔性板及其制备方法。
一种高黏弹柔性板,包括如下重量份数的原料:合成橡胶20-30份、聚氯乙烯10-25份、填料10-20份、发泡剂3-6份、阻燃剂5-8份、橡胶促进剂2-4份。
所述合成橡胶为丁腈橡胶、丁苯橡胶、氯丁橡胶、聚氨酯橡胶、氟橡胶、顺丁橡胶中的一种或几种。
所述合成橡胶为丁苯橡胶与氟橡胶按照质量比2:1混合的混合橡胶。
所述发泡剂为三氯氟甲烷与偶氮二甲酰胺按照质量比1:2混合的混合物。
所述发泡剂为偶氮二甲酰胺与发泡剂EXOCEROL 232按照质量比3:1混合的混合物。
发泡剂均采用有机发泡剂,无机发泡剂如碳酸氢盐等分散性差,产生的气泡大小不均一。三氯氟甲烷为物理发泡剂,发泡过程中吸热,单独使用用量过大,且难以控制释放速率与橡胶的硫化交联速率,偶氮二甲酰胺属于放热型发泡剂,其分解温度高,分解速度快,易造成熔体局部过热等现象使发泡过程难以控制,发明人发现将两者结合使用,能够克服各自的缺陷,发泡均匀,细密。发泡剂EXOCEROL 232为吸放热型发泡剂,发泡起始分解温度低,较宽范围内热分解过程平缓,分解时吸放热基本平衡,这些特点使发泡过程、泡沫结构与尺寸形成过程易于控制,但是其发泡过程致使熔体的粘度较高,不利于硫化交联反应进行,发明人发现将其与偶氮二甲酰胺结合使用,也能够克服各自的缺陷,使发泡均匀,细密,并且发泡过程可控。
所述填料为纳米氧化锌、纳米碳酸钙、硬脂酸钡、矿物纤维中的一种或几种。
所述橡胶促进剂为二硫化四烷基秋兰姆与三硫化双按照质量比1:8混合的混合物。
橡胶促进剂使橡胶内部生成交联网络,并且加热使发泡剂产生分解并生成气体,产生的气体会在密闭模腔中溶入到橡胶材料中,橡胶交联后具有力学强度。
所述阻燃剂为聚磷酸铵、硼酸锌、偏硼酸钠、钛酸铝、全氟丁烷磺酸钾中的一种或几种。
所述原料中还可加入碳黑3-5份,使得材料强度更高,并且耐磨。
一种高黏弹柔性板的制备方法,具体步骤如下:
(1)按照重量份数,取合成橡胶20-30份、聚氯乙烯10-25份,加入至密炼机中,在130-160℃的温度下密炼15-20min;
(2)将步骤(1)得到的产物加入至开放式炼胶机中,加入填料10-20份、发泡剂3-6份、阻燃剂5-8份、橡胶促进剂2-4份,在20-30℃的温度下开炼3-6min;
(3)将经(2)制备的发泡材料混合物送入挤出机,在挤出机温度为20-45℃工艺条件下挤出成型的片材;
(4)将上述成型的片材放置于130-175℃的烘箱中,硫化发泡80-100min后冷却;
(5)将冷却后的材料切割成长度为1-4m的成品片材后包装入库。
本发明的有益效果:本发明通过优化柔性板制备的配方,大幅度提高了泡沫柔性板材料的表观密度,强度以及压缩回弹性能。最优的实施方案制备的柔性板材料表观密度210.5Kg/m2,压缩回弹率为92.0%,抗压强度49.9Mpa,导热系数0.0548W/m.K,真空吸水率2%,氧指数37.3。本发明采用的混合合成橡胶组分,混合发泡剂组分,混合橡胶促进剂组分,均有显著的协同增效功效,这3种组分在功能上相互支持,补充各自所产生的缺陷,最终使得制备的产品既能保持较高的强度和表观密度,又能保持较高的压缩回弹率。
附图说明
图1为丁苯橡胶与氟橡胶不同配比下制备的柔性板抗压强度。
图2为三氯氟甲烷与偶氮二甲酰胺不同配比下制备的柔性板表观密度。
图3为偶氮二甲酰胺与发泡剂EXOCEROL 232不同配比下制备的柔性板表观密度。
图4为二硫化四烷基秋兰姆与三硫化双不同配比下制备的柔性板表观密度。
图5为二硫化四烷基秋兰姆与三硫化双不同配比下制备的柔性板压缩回弹率。
具体实施方式
为了便于理解本发明,下面将对本发明进行更全面的描述。但是,本发明可以以许多不同的形式来实现,并不限于本文所描述的实施例。相反地,提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
实施例1合成橡胶的优选
高黏弹柔性板的制备,首先选取合成橡胶,选取丁苯橡胶与氟橡胶的混合橡胶及各自的单组分,混合的质量比为1:2、1:1、2:1、3:1、4:1;取合成橡胶25份、聚氯乙烯15份,加入至密炼机中,在140℃的温度下密炼18min;将得到的产物加入至开放式炼胶机中,加入纳米碳酸钙15份、偶氮二甲酰胺5份、聚磷酸铵6份、三硫化双3份,在25℃的温度下开炼5min;将经制备的发泡材料混合物送入挤出机,在挤出机温度为30℃工艺条件下挤出成型的片材;将上述成型的片材放置于150℃的烘箱中,硫化发泡90min后冷却。
对制备的试样进行抗压强度检测,检测结果如图1所示,在丁苯橡胶与氟橡胶的质量比为2:1时,具有最大的抗压强度,力学性能最好,发明人又分别采用同质量份数的丁腈橡胶、氯丁橡胶、聚氨酯橡胶、顺丁橡胶以及上述组分的两两结合,抗压强度均低于丁苯橡胶与氟橡胶的组合。
实施例2发泡剂的优选
高黏弹柔性板的制备,首先选取发泡剂,发泡剂为三氯氟甲烷与偶氮二甲酰胺按照质量比2:1、1:1、1:2、1:3、1:4、1:5混合的混合物,以及单组分;另外一组试验选取偶氮二甲酰胺与发泡剂EXOCEROL 232按照质量比1:1、2:1、3:1、4:1、5:1、6:1混合的混合物以及单组分。取丁苯橡胶与氟橡胶的混合橡胶(质量比2:1)25份、聚氯乙烯15份,加入至密炼机中,在140℃的温度下密炼18min;将得到的产物加入至开放式炼胶机中,加入纳米碳酸钙15份、发泡剂5份、聚磷酸铵6份、三硫化双3份,在25℃的温度下开炼5min;将经制备的发泡材料混合物送入挤出机,在挤出机温度为30℃工艺条件下挤出成型的片材;将上述成型的片材放置于150℃的烘箱中,硫化发泡90min后冷却。
按照GB/T6343-2009的规定对制备的试样进行表观密度检测,检测结果如图2-3所示,三氯氟甲烷与偶氮二甲酰胺质量比为1:2时,表观密度最大,其单组分使用表观密度均较小;偶氮二甲酰胺与发泡剂EXOCEROL 232质量比为3:1时,表观密度最大,其单组分使用表观密度均较小;三氯氟甲烷与偶氮二甲酰胺组合使用,具有明显的协同增效效果,偶氮二甲酰胺与发泡剂EXOCEROL 232组合使用,也具有明显的协同增效效果。
实施例3橡胶促进剂的优选
高黏弹柔性板的制备,首先选取橡胶促进剂,橡胶促进剂二硫化四烷基秋兰姆与三硫化双按照质量比1:5、1:6、1:7、1:8、1:9、1:10混合的混合物,以及单组分。取丁苯橡胶与氟橡胶的混合橡胶(质量比2:1)25份、聚氯乙烯15份,加入至密炼机中,在140℃的温度下密炼18min;将得到的产物加入至开放式炼胶机中,加入纳米碳酸钙15份、发泡剂(三氯氟甲烷与偶氮二甲酰胺按照质量比1:2混合)5份、聚磷酸铵6份、三硫化双3份,在25℃的温度下开炼5min;将经制备的发泡材料混合物送入挤出机,在挤出机温度为30℃工艺条件下挤出成型的片材;将上述成型的片材放置于150℃的烘箱中,硫化发泡90min后冷却。
按照GB/T6343-2009的规定对制备的试样进行表观密度检测,按照GB/T6669-2008(50%、72h)进行压缩回弹率检测,检测结果如图4-5所示,二硫化四烷基秋兰姆与三硫化双质量比1:8时,表观密度最大,压缩回弹率也最大,单组分均为最小,证明二硫化四烷基秋兰姆与三硫化双质组合使用,具有显著的协同增效作用。
实施例4最优实施方案
发明人通过反复试验,确定最佳的高黏弹柔性板的制备方案如下:橡胶促进剂为二硫化四烷基秋兰姆与三硫化双按照质量比1:8混合的混合物;合成橡胶为丁苯橡胶与氟橡胶质量比2:1的混合物;发泡剂为三氯氟甲烷与偶氮二甲酰胺按照质量比1:2混合的混合物或者为偶氮二甲酰胺与发泡剂EXOCEROL232按照质量比3:1混合的混合物。制备时,取合成橡胶25份、聚氯乙烯15份,加入至密炼机中,在140℃的温度下密炼18min;将得到的产物加入至开放式炼胶机中,加入纳米碳酸钙15份、发泡剂5份、聚磷酸铵6份、三硫化双3份,在25℃的温度下开炼5min;将经制备的发泡材料混合物送入挤出机,在挤出机温度为30℃工艺条件下挤出成型的片材;将上述成型的片材放置于150℃的烘箱中,硫化发泡80min后冷却。
当发泡剂为三氯氟甲烷与偶氮二甲酰胺按照质量比1:2混合的混合物时,测得制备产物的表观密度181.9Kg/m2,压缩回弹率为90.8%,抗压强度45.8Mpa,导热系数0.0538W/m.K(GB/T10294-2008,40℃),真空吸水率2%(GB/T17794-2008),氧指数37.1(GB/T2406.2-2009)。
当发泡剂为偶氮二甲酰胺与发泡剂EXOCEROL 232按照质量比3:1混合的混合物时,测得制备产物的表观密度210.5Kg/m2,压缩回弹率为92.0%,抗压强度49.9Mpa,导热系数0.0548W/m.K(GB/T10294-2008,40℃),真空吸水率2%(GB/T17794-2008),氧指数37.3(GB/T2406.2-2009)。
下述实施例为本发明可实现的其他实施方式,虽然产品性能检测指标不及实施例4,但也应在本发明的保护范围之内。
实施例5
高黏弹柔性板的制备,橡胶促进剂为二硫化四烷基秋兰姆与三硫化双按照质量比1:8混合的混合物;合成橡胶为丁腈橡胶;发泡剂为三氯氟甲烷与偶氮二甲酰胺按照质量比1:2混合的混合物。制备时,取合成橡胶25份、聚氯乙烯15份,加入至密炼机中,在130℃的温度下密炼18min;将得到的产物加入至开放式炼胶机中,加入纳米碳酸钙15份、发泡剂5份、聚磷酸铵6份、三硫化双3份,在22℃的温度下开炼5min;将经制备的发泡材料混合物送入挤出机,在挤出机温度为35℃工艺条件下挤出成型的片材;将上述成型的片材放置于160℃的烘箱中,硫化发泡100min后冷却。
实施例6
高黏弹柔性板的制备,橡胶促进剂为二硫化四烷基秋兰姆与三硫化双按照质量比1:8混合的混合物;合成橡胶为氯丁橡胶;发泡剂为偶氮二甲酰胺与发泡剂EXOCEROL 232按照质量比3:1混合的混合物。制备时,取合成橡胶30份、聚氯乙烯18份,加入至密炼机中,在160℃的温度下密炼15min;将得到的产物加入至开放式炼胶机中,加入纳米碳酸钙12份、发泡剂5份、聚磷酸铵7份、三硫化双3份,在28℃的温度下开炼5min;将经制备的发泡材料混合物送入挤出机,在挤出机温度为40℃工艺条件下挤出成型的片材;将上述成型的片材放置于150℃的烘箱中,硫化发泡85min后冷却。
实施例7
高黏弹柔性板的制备,橡胶促进剂为二硫化四烷基秋兰姆与三硫化双按照质量比1:8混合的混合物;合成橡胶为聚氨酯橡胶与顺丁橡胶质量比2:1的混合物;发泡剂为三氯氟甲烷与偶氮二甲酰胺按照质量比1:2混合的混合物。制备时,取合成橡胶25份、聚氯乙烯15份,加入至密炼机中,在150℃的温度下密炼18min;将得到的产物加入至开放式炼胶机中,加入纳米碳酸钙15份、发泡剂5份、聚磷酸铵6份、三硫化双3份,在26℃的温度下开炼5min;将经制备的发泡材料混合物送入挤出机,在挤出机温度为25℃工艺条件下挤出成型的片材;将上述成型的片材放置于130℃的烘箱中,硫化发泡90min后冷却。
实施例8
高黏弹柔性板的制备,橡胶促进剂为二硫化四烷基秋兰姆与三硫化双按照质量比1:8混合的混合物;合成橡胶为丁苯橡胶与氟橡胶质量比2:1的混合物;发泡剂为偶氮二甲酰胺与发泡剂EXOCEROL 232按照质量比3:1混合的混合物。制备时,取合成橡胶28份、聚氯乙烯16份,加入至密炼机中,在145℃的温度下密炼18min;将得到的产物加入至开放式炼胶机中,加入纳米碳酸钙15份、发泡剂5份、硼酸锌3份、偏硼酸钠3份、三硫化双3份,在25℃的温度下开炼5min;将经制备的发泡材料混合物送入挤出机,在挤出机温度为45℃工艺条件下挤出成型的片材;将上述成型的片材放置于140℃的烘箱中,硫化发泡85min后冷却。
实施例9
高黏弹柔性板的制备,橡胶促进剂为二硫化四烷基秋兰姆与三硫化双按照质量比1:8混合的混合物;合成橡胶为丁苯橡胶与氟橡胶质量比2:1的混合物;发泡剂为偶氮二甲酰胺与发泡剂EXOCEROL 232按照质量比3:1混合的混合物。制备时,取合成橡胶22份、聚氯乙烯18份,加入至密炼机中,在150℃的温度下密炼18min;将得到的产物加入至开放式炼胶机中,加入纳米碳酸钙14份、发泡剂5份、钛酸铝3份、全氟丁烷磺酸钾4份、三硫化双4份,在20℃的温度下开炼6min;将经制备的发泡材料混合物送入挤出机,在挤出机温度为30℃工艺条件下挤出成型的片材;将上述成型的片材放置于160℃的烘箱中,硫化发泡95min后冷却。
实施例10
高黏弹柔性板的制备,橡胶促进剂为二硫化四烷基秋兰姆与三硫化双按照质量比1:8混合的混合物;合成橡胶为丁苯橡胶与氟橡胶质量比2:1的混合物;发泡剂为三氯氟甲烷与偶氮二甲酰胺按照质量比1:2混合的混合物。制备时,取合成橡胶26份、聚氯乙烯14份,加入至密炼机中,在155℃的温度下密炼18min;将得到的产物加入至开放式炼胶机中,加入纳米氧化锌6份、硬脂酸钡3份、矿物纤维5份、发泡剂6份、聚磷酸铵5份、三硫化双3份,在25℃的温度下开炼5min;将经制备的发泡材料混合物送入挤出机,在挤出机温度为35℃工艺条件下挤出成型的片材;将上述成型的片材放置于155℃的烘箱中,硫化发泡90min后冷却。
实施例11
高黏弹柔性板的制备,橡胶促进剂为二硫化四烷基秋兰姆与三硫化双按照质量比1:8混合的混合物;合成橡胶为丁苯橡胶与氟橡胶质量比2:1的混合物;发泡剂为三氯氟甲烷与偶氮二甲酰胺按照质量比1:2混合的混合物。制备时,取合成橡胶25份、聚氯乙烯15份,加入至密炼机中,在140℃的温度下密炼16min;将得到的产物加入至开放式炼胶机中,加入纳米碳酸钙15份、发泡剂5份、聚磷酸铵6份、三硫化双3份,碳黑4份,在25℃的温度下开炼5min;将经制备的发泡材料混合物送入挤出机,在挤出机温度为30℃工艺条件下挤出成型的片材;将上述成型的片材放置于160℃的烘箱中,硫化发泡100min后冷却。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。
Claims (10)
1.一种高黏弹柔性板,其特征在于,包括如下重量份数的原料:合成橡胶20-30份、聚氯乙烯10-25份、填料10-20份、发泡剂3-6份、阻燃剂5-8份、橡胶促进剂2-4份。
2.根据权利要求1所述高黏弹柔性板,其特征在于,所述合成橡胶为丁腈橡胶、丁苯橡胶、氯丁橡胶、聚氨酯橡胶、氟橡胶、顺丁橡胶中的一种或几种。
3.根据权利要求1所述高黏弹柔性板,其特征在于,所述合成橡胶为丁苯橡胶与氟橡胶按照质量比2:1混合的混合橡胶。
4.根据权利要求1所述高黏弹柔性板,其特征在于,所述发泡剂为三氯氟甲烷与偶氮二甲酰胺按照质量比1:2混合的混合物。
5.根据权利要求1所述高黏弹柔性板,其特征在于,所述发泡剂为偶氮二甲酰胺与发泡剂EXOCEROL 232按照质量比3:1混合的混合物。
6.根据权利要求1所述高黏弹柔性板,其特征在于,所述填料为纳米氧化锌、纳米碳酸钙、硬脂酸钡、矿物纤维中的一种或几种。
7.根据权利要求1所述高黏弹柔性板,其特征在于,所述橡胶促进剂为二硫化四烷基秋兰姆与三硫化双按照质量比1:8混合的混合物。
8.根据权利要求1所述高黏弹柔性板,其特征在于,所述阻燃剂为聚磷酸铵、硼酸锌、偏硼酸钠、钛酸铝、全氟丁烷磺酸钾中的一种或几种。
9.根据权利要求1所述高黏弹柔性板,其特征在于,所述原料中还加入碳黑3-5份。
10.一种如权利要求1-9任一所述的高黏弹柔性板的制备方法,其特征在于,具体步骤如下:
(1)按照重量份数,取合成橡胶20-30份、聚氯乙烯10-25份,加入至密炼机中,在130-160℃的温度下密炼15-20min;
(2)将步骤(1)得到的产物加入至开放式炼胶机中,加入填料10-20份、发泡剂3-6份、阻燃剂5-8份、橡胶促进剂2-4份,在20-30℃的温度下开炼3-6min;
(3)将经(2)制备的发泡材料混合物送入挤出机,在挤出机温度为20-45℃工艺条件下挤出成型的片材;
(4)将上述成型的片材放置于130-175℃的烘箱中,硫化发泡80-100min后冷却;
(5)将冷却后的材料切割成长度为1-4m的成品片材后包装入库。
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