CN105778336A - 一种pvc发泡母料及其制备方法 - Google Patents
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Abstract
本申请公开了一种PVC发泡母料及其制备方法,按照重量份数配比称取PVC、偶氮二甲酰胺、DOP、环六亚甲基四胺、三碱式硫酸铅、二碱式亚磷酸铅、DCP、氧化锌、AC发泡剂、NBR、SBR和氰尿酸三烯丙酯,产品强度高,拉伸强度45‑85MPa,拉伸模量3300‑3700MPa,肖氏硬度70‑80D;冲击强度15‑55kJ/m2,热变形温度90‑110℃;弯曲强度25‑65MPa,弯曲模量2.5‑4.5GPa;断裂伸长率110‑150%,熔体流动指数8‑12g/10min,成本低廉,操作简单,可以广泛生产并不断代替现有材料。
Description
技术领域
本申请属于PVC材料领域,尤其涉及一种PVC发泡母料及其制备方法。
背景技术
聚氯乙烯,英文简称PVC(Polyvinyl chloride),是氯乙烯单体(vinyl chloride monomer, 简称VCM)在过氧化物、偶氮化合物等引发剂;或在光、热作用下按自由基聚合反应机理聚合而成的聚合物。氯乙烯均聚物和氯乙烯共聚物统称之为氯乙烯树脂。
工业生产的PVC分子量一般在5万~11万范围内,具有较大的多分散性,分子量随聚合温度的降低而增加;无固定熔点,80~85℃开始软化,130℃变为粘弹态,160~180℃开始转变为粘流态;有较好的机械性能,抗张强度60MPa左右,冲击强度5~10kJ/m2;有优异的介电性能。
PVC曾是世界上产量最大的通用塑料,应用非常广泛。在建筑材料、工业制品、日用品、地板革、地板砖、人造革、管材、电线电缆、包装膜、瓶、发泡材料、密封材料、纤维等方面均有广泛应用。
PVC在19世纪被发现过两次,一次是Henri Victor Regnault在1835年,另一次是Eugen Baumann在1872年发现的。两次机会中,这种聚合物都出现在被放置在太阳光底下的氯乙烯的烧杯中,成为白色固体。20世纪初,俄国化学家Ivan Ostromislensky和德国Griesheim-Elektron公司的化学家Fritz Klatte同时尝试将PVC用于商业用途,但困难的是如何加工这种坚硬的,有时脆性的的聚合物。。
聚氯乙烯塑料制品应用非常广泛,但在七十年代中期,人们认识到聚氯乙烯树脂及制品中残留的单体氯乙烯(VCM)是一种严重的致癌物质,无疑在一定程度会影响聚氯乙烯的发展。不过人们已成功地通过汽车等途径降低残留的VCM,使聚氯乙烯树脂中VCM会含量小于10ppm,达到卫生级树脂要求,扩大了聚氯乙烯的应用范围。甚至可使树脂中的VCM含量小于5ppm,加工后残留的VCM极少。对人体基本无害,可用作食品药包装和儿童玩具等。
根据应用范围的不同,PVC可分为:通用型PVC树脂、高聚合度PVC树脂、交联PVC树脂。通用型PVC树脂是由氯乙烯单体在引发剂的作用下聚合形成的;高聚合度PVC树脂是指在氯乙烯单体聚合体系中加入链增长剂聚合而成的树脂;交联PVC树脂是在氯乙烯单体聚合体系中加入含有双烯和多烯的交联剂聚合而成的树脂。
聚氯乙烯可由乙烯、氯和催化剂经取代反应制成。由于其防火耐热作用,聚氯乙烯被广泛用于各行各业各式各样产品: 电线外皮、光纤外皮、鞋、手袋、袋、饰物、招牌与广告牌、建筑装潢用品、家俱、挂饰、滚轮、喉管、玩具(如有名的意大利“Rody”跳跳马)、门帘、卷门、辅助医疗用品、手套、某些食物的保鲜纸、某些时装等。而随着人性化理念的普及,及新型和谐社会的构成,设计一种强度高、耐冲击的PVC发泡母料及其制备方法是非常必要的。
根据聚氯乙烯中加入的增塑剂多少,可分为硬质、半硬腩和软质聚氯乙烯。硬腩聚氯乙烯添加的增塑剂一般<10%,半硬质为10~30%,软质为30~50%。其物理机械性能也随其组分不同 而有所不同。总的说来,聚氯乙烯具有耐化学性好、机械强度较高、绝缘性好和价廉的特点 。聚氯乙烯半硬片可经吸塑加工成塑料盒;软质聚氯乙烯可作为饮料盖、四旋瓶盖的垫片( 俗称滴塑);硬质聚氯乙烯可加工成塑料管、板等。
发泡剂AC是发气量最大,性能最优越、用途广泛的发泡剂。它运用于聚氯乙烯、聚乙烯、聚丙烯、聚苯乙烯、聚酰胺、ABS及各种橡胶等合成材料。广泛用于拖鞋、鞋底、鞋垫、塑料壁纸、天花板、地板革、人造革、绝热、隔音材料等发泡。发泡剂AC具有性能稳定、不易燃、不污染、无毒无味、对模具不腐蚀对制品不染色,分解温度可调节,不影响固化和成型速度等特点。本品常压发泡、加压发泡均可,都能连发泡均匀,细孔结构理想。
发明内容
解决的技术问题:
本申请针对上述技术问题,提供一种PVC发泡母料及其制备方法,解决现有塑料合金料拉伸强度低、冲击强度低、弯曲强度低等技术问题。
技术方案:
一种PVC发泡母料,所述PVC发泡母料的原料按重量份数配比如下:PVC100份;偶氮二甲酰胺15-35份;DOP55-75份;环六亚甲基四胺3-7份;三碱式硫酸铅8-12份;二碱式亚磷酸铅6-10份;DCP4-8份;氧化锌1-5份;AC发泡剂5-25份;NBR为10-30份;氰尿酸三烯丙酯2-6份;SBR14-18份。
作为本发明的一种优选技术方案:所述PVC发泡母料的原料按重量份数配比如下:PVC100份;偶氮二甲酰胺20-30份;DOP60-70份;环六亚甲基四胺4-6份;三碱式硫酸铅9-11份;二碱式亚磷酸铅7-9份;DCP5-7份;氧化锌2-4份;AC发泡剂10-20份;NBR为15-25份;氰尿酸三烯丙酯3-5份;SBR15-17份。
作为本发明的一种优选技术方案:所述PVC发泡母料的原料按重量份数配比如下:PVC100份;偶氮二甲酰胺20份;DOP60份;环六亚甲基四胺4份;三碱式硫酸铅9份;二碱式亚磷酸铅7份;DCP5份;氧化锌2份;AC发泡剂10份;NBR为15份;氰尿酸三烯丙酯3份;SBR15份。
作为本发明的一种优选技术方案:所述PVC发泡母料的原料按重量份数配比如下:PVC100份;偶氮二甲酰胺30份;DOP70份;环六亚甲基四胺6份;三碱式硫酸铅11份;二碱式亚磷酸铅9份;DCP7份;氧化锌4份;AC发泡剂20份;NBR为25份;氰尿酸三烯丙酯5份;SBR17份。
作为本发明的一种优选技术方案:所述PVC发泡母料的原料按重量份数配比如下:PVC100份;偶氮二甲酰胺25份;DOP65份;环六亚甲基四胺5份;三碱式硫酸铅10份;二碱式亚磷酸铅8份;DCP6份;氧化锌3份;AC发泡剂15份;NBR为20份;氰尿酸三烯丙酯4份;SBR16份。
作为本发明的一种优选技术方案:所述PVC发泡母料的制备方法,包括如下步骤:
第一步:按照重量份数配比称取PVC、偶氮二甲酰胺、DOP、环六亚甲基四胺、三碱式硫酸铅、二碱式亚磷酸铅、DCP、氧化锌、三碱式硫酸铅、NBR、SBR和氰尿酸三烯丙酯;
第二步:将物料投入高速捏合机内,升温至90-100℃,在800-1000r/min转速下捏合5-15min;
第三步:捏合后投入双螺杆挤出机,料筒温度120-130℃、125-135℃、130-140℃、135-145℃、140-150℃,螺杆温度140-150℃,机头温度140-150℃、145-155℃、150-160℃、165-175℃、170-180℃,螺杆转速55-75r/min,投料转速20-40 r/min。
有益效果:
本发明所述一种PVC发泡母料及其制备方法采用以上技术方案与现有技术相比,具有以下技术效果:1、产品强度高,拉伸强度45-85MPa,拉伸模量3300-3700MPa,肖氏硬度70-80D;2、冲击强度15-55kJ/m2,热变形温度90-110℃;3、弯曲强度25-65MPa,弯曲模量2.5-4.5GPa;4、断裂伸长率110-150%,熔体流动指数8-12g/10min,成本低廉,操作简单,可以广泛生产并不断代替现有材料。
具体实施方式
实施例
1:
按照重量份数配比称取PVC100份;偶氮二甲酰胺15份;DOP55份;环六亚甲基四胺3份;三碱式硫酸铅8份;二碱式亚磷酸铅6份;DCP4份;氧化锌1份;AC发泡剂5份;NBR为10份;氰尿酸三烯丙酯2份;SBR14份。
将物料投入高速捏合机内,升温至90℃,在800r/min转速下捏合5min。
捏合后投入双螺杆挤出机,料筒温度120℃、125℃、130℃、135℃、140℃,螺杆温度140℃,机头温度140℃、145℃、150℃、165℃、170℃,螺杆转速55r/min,投料转速20r/min。
产品强度高,拉伸强度45MPa,拉伸模量3300MPa,肖氏硬度70D;冲击强度15kJ/m2,热变形温度90℃;弯曲强度25MPa,弯曲模量2.5GPa;断裂伸长率110%,熔体流动指数8-12g/10min。
实施例
2:
按照重量份数配比称取PVC100份;偶氮二甲酰胺35份;DOP75份;环六亚甲基四胺7份;三碱式硫酸铅12份;二碱式亚磷酸铅10份;DCP8份;氧化锌5份;AC发泡剂25份;NBR为30份;氰尿酸三烯丙酯6份;SBR18份。
将物料投入高速捏合机内,升温至100℃,在1000r/min转速下捏合15min。
捏合后投入双螺杆挤出机,料筒温度130℃、135℃、140℃、145℃、150℃,螺杆温度150℃,机头温度150℃、155℃、160℃、175℃、180℃,螺杆转速75r/min,投料转速40 r/min。
产品强度高,拉伸强度55MPa,拉伸模量3400MPa,肖氏硬度73D;冲击强度25kJ/m2,热变形温度95℃;弯曲强度35MPa,弯曲模量3GPa;断裂伸长率120%,熔体流动指数9g/10min。
实施例
3:
按照重量份数配比称取PVC100份;偶氮二甲酰胺20份;DOP60份;环六亚甲基四胺4份;三碱式硫酸铅9份;二碱式亚磷酸铅7份;DCP5份;氧化锌2份;AC发泡剂10份;NBR为15份;氰尿酸三烯丙酯3份;SBR15份。
将物料投入高速捏合机内,升温至90℃,在800r/min转速下捏合5min。
捏合后投入双螺杆挤出机,料筒温度120℃、125℃、130℃、135℃、140℃,螺杆温度140℃,机头温度140℃、145℃、150℃、165℃、170℃,螺杆转速55r/min,投料转速20r/min。
产品强度高,拉伸强度65MPa,拉伸模量3500MPa,肖氏硬度75D;冲击强度35kJ/m2,热变形温度100℃;弯曲强度45MPa,弯曲模量3.5GPa;断裂伸长率130%,熔体流动指数10g/10min。
实施例
4:
按照重量份数配比称取PVC100份;偶氮二甲酰胺30份;DOP70份;环六亚甲基四胺6份;三碱式硫酸铅11份;二碱式亚磷酸铅9份;DCP7份;氧化锌4份;AC发泡剂20份;NBR为25份;氰尿酸三烯丙酯5份;SBR17份。
将物料投入高速捏合机内,升温至100℃,在1000r/min转速下捏合15min。
捏合后投入双螺杆挤出机,料筒温度130℃、135℃、140℃、145℃、150℃,螺杆温度150℃,机头温度150℃、155℃、160℃、175℃、180℃,螺杆转速75r/min,投料转速40 r/min。
产品强度高,拉伸强度75MPa,拉伸模量3600MPa,肖氏硬度75D;冲击强度50kJ/m2,热变形温度105℃;弯曲强度60MPa,弯曲模量4GPa;断裂伸长率145%,熔体流动指数12g/10min。
实施例
5:
按照重量份数配比称取PVC100份;偶氮二甲酰胺25份;DOP65份;环六亚甲基四胺5份;三碱式硫酸铅10份;二碱式亚磷酸铅8份;DCP6份;氧化锌3份;AC发泡剂15份;NBR为20份;氰尿酸三烯丙酯4份;SBR16份。
将物料投入高速捏合机内,升温至95℃,在900r/min转速下捏合10min。
捏合后投入双螺杆挤出机,料筒温度125℃、130℃、135℃、140℃、145℃,螺杆温度145℃,机头温度145℃、150℃、155℃、170℃、175℃,螺杆转速65r/min,投料转速30 r/min。
产品强度高,拉伸强度85MPa,拉伸模量3700MPa,肖氏硬度80D;冲击强度55kJ/m2,热变形温度110℃;弯曲强度65MPa,弯曲模量4.5GPa;断裂伸长率150%,熔体流动指数12g/10min。
以上实施例中的组合物所有组分均可以商业购买。
上述实施例只是用于对本发明的内容进行阐述,而不是限制,因此在与本发明的权利要求书相当的含义和范围内的任何改变,都应该认为是包括在权利要求书的范围内。
Claims (6)
1.一种PVC发泡母料,其特征在于所述PVC发泡母料的原料按重量份数配比如下:PVC100份;偶氮二甲酰胺15-35份;DOP55-75份;环六亚甲基四胺3-7份;三碱式硫酸铅8-12份;二碱式亚磷酸铅6-10份;DCP4-8份;氧化锌1-5份;AC发泡剂5-25份;NBR为10-30份;氰尿酸三烯丙酯2-6份;SBR14-18份。
2.根据权利要求1所述的一种PVC发泡母料,其特征在于所述PVC发泡母料原料按重量份数配比如下:PVC100份;偶氮二甲酰胺20-30份;DOP60-70份;环六亚甲基四胺4-6份;三碱式硫酸铅9-11份;二碱式亚磷酸铅7-9份;DCP5-7份;氧化锌2-4份;AC发泡剂10-20份;NBR为15-25份;氰尿酸三烯丙酯3-5份;SBR15-17份。
3.根据权利要求1所述的一种PVC发泡母料,其特征在于所述PVC发泡母料的原料按重量份数配比如下:PVC100份;偶氮二甲酰胺20份;DOP60份;环六亚甲基四胺4份;三碱式硫酸铅9份;二碱式亚磷酸铅7份;DCP5份;氧化锌2份;AC发泡剂10份;NBR为15份;氰尿酸三烯丙酯3份;SBR15份。
4.根据权利要求1所述的一种PVC发泡母料,其特征在于所述PVC发泡母料的原料按重量份数配比如下:PVC100份;偶氮二甲酰胺30份;DOP70份;环六亚甲基四胺6份;三碱式硫酸铅11份;二碱式亚磷酸铅9份;DCP7份;氧化锌4份;AC发泡剂20份;NBR为25份;氰尿酸三烯丙酯5份;SBR17份。
5.根据权利要求1所述的一种PVC发泡母料,其特征在于:所述PVC发泡母料的原料按重量份数配比如下:PVC100份;偶氮二甲酰胺25份;DOP65份;环六亚甲基四胺5份;三碱式硫酸铅10份;二碱式亚磷酸铅8份;DCP6份;氧化锌3份;AC发泡剂15份;NBR为20份;氰尿酸三烯丙酯4份;SBR16份。
6.一种权利要求1所述PVC发泡母料的制备方法,其特征在于,包括如下步骤:
第一步:按照重量份数配比称取PVC、偶氮二甲酰胺、DOP、环六亚甲基四胺、三碱式硫酸铅、二碱式亚磷酸铅、DCP、氧化锌、AC发泡剂、NBR、SBR和氰尿酸三烯丙酯;
第二步:将物料投入高速捏合机内,升温至90-100℃,在800-1000r/min转速下捏合5-15min;
第三步:捏合后投入双螺杆挤出机,料筒温度120-130℃、125-135℃、130-140℃、135-145℃、140-150℃,螺杆温度140-150℃,机头温度140-150℃、145-155℃、150-160℃、165-175℃、170-180℃,螺杆转速55-75r/min,投料转速20-40 r/min。
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