CN105924814A - 一种氯化聚乙烯/聚氯乙烯复合发泡材料的制备方法 - Google Patents

一种氯化聚乙烯/聚氯乙烯复合发泡材料的制备方法 Download PDF

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CN105924814A
CN105924814A CN201610469761.0A CN201610469761A CN105924814A CN 105924814 A CN105924814 A CN 105924814A CN 201610469761 A CN201610469761 A CN 201610469761A CN 105924814 A CN105924814 A CN 105924814A
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仇颖莹
张明
王龙
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Abstract

本发明公开了一种氯化聚乙烯/聚氯乙烯复合发泡材料的制备方法,属于发泡材料制备技术领域。本发明将聚氯乙烯吸收邻苯二甲酸二辛酯膨润,使其松软并具有弹性,再与交联剂氧化二异丙苯和丙烯酸十八酯共混,添加成核剂碳酸钙,氯化聚乙烯混炼,冷却出料得氯化聚乙烯/聚氯乙烯母胶,将氯化聚乙烯/聚氯乙烯母胶在模具中加热成型,再用无污染的超临界二氧化碳作为物理发泡剂,提高发泡倍率,生成均匀细密的泡孔,从而得到氯化聚乙烯/聚氯乙烯复合发泡材料的方法。实例证明,本发明制备过程反应温和,在保持低成本和高阻燃性优势的同时,使得制得的氯化聚乙烯/聚氯乙烯复合发泡材料密度最小、泡孔分布均匀、另外强度也得到了显著提高。

Description

一种氯化聚乙烯/聚氯乙烯复合发泡材料的制备方法
技术领域
本发明公开了一种氯化聚乙烯/聚氯乙烯复合发泡材料的制备方法,属于发泡材料制备技术领域。
背景技术
聚氯乙烯(PVC)是一种性能优良的通用型热塑性塑料,是我国产量最大的塑料品种之一。聚氯乙烯具有阻燃性好、耐腐蚀、机械强度高、电绝缘性好、成本低等优点,但与此同时也存在光热稳定性差、抗冲击强度低、加工成形性能差、密度高等缺点,因此在聚氯乙烯加工过程中必须加入各种稳定剂、加工助剂和抗冲改性剂,以改善其光/热稳定性、加工性能和抗冲击性能。通过向聚氯乙烯树脂中加入发泡剂和加工助剂,可以得到一种聚氯乙烯发泡材料,大大降低了聚氯乙烯制品的密度。
与不发泡聚氯乙烯材料相比,聚氯乙烯发泡材料具有密度低、质轻,而且具有优良的缓冲减震、隔音吸音性能,热导率低,隔热性能好,还具优良的电绝缘、耐腐蚀、耐霉菌性能;其次它减少了原料用量,进而降低了产品的成本;降低了热导率,提高了保温性,隔热性;减少了热膨胀性。与木质材料相比,聚氯乙烯发泡材料具有防潮、防腐、防虫、阻燃、可无需油漆、无毒无味等特点,还会防白蚁。在聚氯乙烯发泡制品中添加了木粉或者其他填充料,通过添加不同的填充料,赋予硬质聚氯乙烯发泡制品不同的特性,同时硬质聚氯乙烯发泡制品表面装饰性好。该类产品不但可以节约木材,还可以有效改善人们的居住环境,是最佳的室内外建筑材料。聚氯乙烯低发泡材料除了能够取代木材之外,还可以取代其他的建筑材料。
聚氯乙烯发泡材料具有成本低和阻燃性好的优势,但其劣势在于密度高,一般其密度在0.40~0.7g/cm3。因此如何降低聚氯乙烯材料的密度是阻碍聚氯乙烯发泡材料替代聚苯乙烯发泡材料的关键问题。在现有的利用辐照交联的方法来生产发泡聚氯乙烯材料的技术中,人造革发泡技术主要是化学方法发泡,即添加发泡剂进行发泡。发泡剂一般采用偶氮二甲酰胺,二亚硝基亚次甲基四胺,对甲基磺酰胺或偶氮二异丁腈,但是制得的聚氯乙烯发泡材料,材料单胞率低,泡孔孔径尺寸范围宽,泡孔分布不均匀,且强度低,无良好弹性。
发明内容
本发明主要解决的技术问题:针对目前常用的聚氯乙烯发泡材料密度较高,现有方法制得的聚氯乙烯发泡材料孔径尺寸范围宽,泡孔分布不均匀且强度低的问题,提供了一种将聚氯乙烯吸收邻苯二甲酸二辛酯膨润,使其松软并具有弹性,再与交联剂氧化二异丙苯和丙烯酸十八酯共混,添加成核剂碳酸钙,氯化聚乙烯混炼,冷却出料得氯化聚乙烯/聚氯乙烯母胶,将氯化聚乙烯/聚氯乙烯母胶在模具中加热成型,再用无污染的超临界二氧化碳作为物理发泡剂,提高发泡倍率,生成均匀细密的泡孔,从而得到氯化聚乙烯/聚氯乙烯复合发泡材料的方法。该方法操作简便,制备过程反应温和,在保持低成本和高阻燃性优势的同时,使得制得的氯化聚乙烯/聚氯乙烯复合发泡材料密度最小、泡孔分布均匀、力学性能优异,另外强度也得到了显著提高,适合大规模推广应用。
为了解决上述技术问题,本发明所采用的技术方案是:
(1)按质量份数计,分别称量95~100份聚氯乙烯,55~60份邻苯二甲酸二辛酯,5~6份氧化锌,充分混合后,置于75~80℃干燥箱中进行膨润,至混合料呈松软状,得预膨润聚氯乙烯;
(2)将上述预膨润聚氯乙烯置入密炼机中塑化3~5min,密炼室温度为140~145℃,转子转速为60~70r/min,再将100~110份氯化聚乙烯,0.5~0.6份过氧化二异丙苯,5~6份丙烯酸十八酯和5~6份纳米碳酸钙加入密炼机,混炼7~10min,控制排胶温度为170~180℃,出料,冷却至室温,得氯化聚乙烯/聚氯乙烯母胶;
(3)将上述氯化聚乙烯/聚氯乙烯母胶放在平板硫化机上,置于185~190℃模具中加热,在7~8MPa压力下,压制10~12min,冷却定型,得预塑化氯化聚乙烯/聚氯乙烯;
(4)将上述预塑化氯化聚乙烯/聚氯乙烯放入反应釜中,升温至75~80℃,并通入二氧化碳至压力为7~8MPa,浸润15~20min后,以0.5MPa/s泄压速率降压至常压,通入循环冷却水冷却至室温,取出,得氯化聚乙烯/聚氯乙烯复合发泡材料。
本发明制得的氯化聚乙烯/聚氯乙烯复合发泡材料密度为0.28~0.32g/cm3,撕裂强度为2.8~3.2N/mm,拉伸强度为0.38~0.415MPa,断裂伸长率为180~190%,冲击回弹率为40~42%,压缩形变为30~34%。
本发明的应用方法是:按质量份数计,取2~5份有机锡稳定剂、10~12份氯化聚乙烯/聚氯乙烯复合发泡材料、3~5份抗虫改性剂、1~3份抗冲击改性剂B522以及1~2份石蜡,充分混合均匀,加热至100~150℃,保温1~2h,冷却至25~35℃,出料造粒,送入挤出机中,在5~7MPa压力下挤出成型,得氯化聚乙烯/聚氯乙烯发泡板材。经检测,由于以本发明制得的氯化聚乙烯/聚氯乙烯发泡材料为原料,使得制得的氯化聚乙烯/聚氯乙烯发泡板材膨胀率提升65%以上,具有优越的机械力学性能。
本发明的有益效果是:
(1)本发明操作简便,制备过程反应温和,属于安全操作工艺;
(2)本发明用无污染的超临界二氧化碳作为成型氯化聚乙烯/聚氯乙烯母胶的物理发泡剂,从而提高了发泡倍率,生成均匀细密的泡孔;
(3)本发明在保持低成本和高阻燃性优势的同时,使得制得的氯化聚乙烯/聚氯乙烯复合发泡材料密度最小、泡孔分布均匀、力学性能优异,另外强度也得到了显著提高,适合大规模推广应用;
(4)本发明制得的氯化聚乙烯/聚氯乙烯复合发泡材料可广泛应用于建筑、包装、家具工业等领域内。
具体实施方式
首先按质量份数计,分别称量95~100份聚氯乙烯,55~60份邻苯二甲酸二辛酯,5~6份氧化锌,充分混合后,置于75~80℃干燥箱中进行膨润,至混合料呈松软状,得预膨润聚氯乙烯;然后将上述预膨润聚氯乙烯置入密炼机中塑化3~5min,密炼室温度为140~145℃,转子转速为60~70r/min,再将100~110份氯化聚乙烯,0.5~0.6份过氧化二异丙苯,5~6份丙烯酸十八酯和5~6份纳米碳酸钙加入密炼机,混炼7~10min,控制排胶温度为170~180℃,出料,冷却至室温,得氯化聚乙烯/聚氯乙烯母胶;接下来将上述氯化聚乙烯/聚氯乙烯母胶放在平板硫化机上,置于185~190℃模具中加热,在7~8MPa压力下,压制10~12min,冷却定型,得预塑化氯化聚乙烯/聚氯乙烯;最后将上述预塑化氯化聚乙烯/聚氯乙烯放入反应釜中,升温至75~80℃,并通入二氧化碳至压力为7~8MPa,浸润15~20min后,以0.5MPa/s泄压速率降压至常压,通入循环冷却水冷却至室温,取出,得氯化聚乙烯/聚氯乙烯复合发泡材料。
实例1
首先按质量份数计,分别称量95份聚氯乙烯,55份邻苯二甲酸二辛酯,5份氧化锌,充分混合后,置于75℃干燥箱中进行膨润,至混合料呈松软状,得预膨润聚氯乙烯;然后将上述预膨润聚氯乙烯置入密炼机中塑化3min,密炼室温度为140℃,转子转速为60r/min,再将100份氯化聚乙烯,0.5份过氧化二异丙苯,5份丙烯酸十八酯和5份纳米碳酸钙加入密炼机,混炼7min,控制排胶温度为170℃,出料,冷却至室温,得氯化聚乙烯/聚氯乙烯母胶;接下来将上述氯化聚乙烯/聚氯乙烯母胶放在平板硫化机上,置于185℃模具中加热,在7MPa压力下,压制10min,冷却定型,得预塑化氯化聚乙烯/聚氯乙烯;最后将上述预塑化氯化聚乙烯/聚氯乙烯放入反应釜中,升温至75℃,并通入二氧化碳至压力为7MPa,浸润15min后,以0.5MPa/s泄压速率降压至常压,通入循环冷却水冷却至室温,取出,得氯化聚乙烯/聚氯乙烯复合发泡材料。
本实例操作简便,使用时,按质量份数计,取2份有机锡稳定剂、10份氯化聚乙烯/聚氯乙烯复合发泡材料、3份抗虫改性剂、1份抗冲击改性剂B522以及1份石蜡,充分混合均匀,加热至100℃,保温1h,冷却至25℃,出料造粒,送入挤出机中,在5MPa压力下挤出成型,得氯化聚乙烯/聚氯乙烯发泡板材。经检测,由于以本发明制得的氯化聚乙烯/聚氯乙烯发泡材料为原料,使得制得的氯化聚乙烯/聚氯乙烯发泡板材膨胀率提升65%,具有优越的机械力学性能。
实例2
首先按质量份数计,分别称量98份聚氯乙烯,58份邻苯二甲酸二辛酯,5.5份氧化锌,充分混合后,置于78℃干燥箱中进行膨润,至混合料呈松软状,得预膨润聚氯乙烯;然后将上述预膨润聚氯乙烯置入密炼机中塑化4min,密炼室温度为143℃,转子转速为65r/min,再将105份氯化聚乙烯,0.55份过氧化二异丙苯,5.5份丙烯酸十八酯和5.5份纳米碳酸钙加入密炼机,混炼8min,控制排胶温度为175℃,出料,冷却至室温,得氯化聚乙烯/聚氯乙烯母胶;接下来将上述氯化聚乙烯/聚氯乙烯母胶放在平板硫化机上,置于188℃模具中加热,在7.5MPa压力下,压制11min,冷却定型,得预塑化氯化聚乙烯/聚氯乙烯;最后将上述预塑化氯化聚乙烯/聚氯乙烯放入反应釜中,升温至78℃,并通入二氧化碳至压力为7.5MPa,浸润18min后,以0.5MPa/s泄压速率降压至常压,通入循环冷却水冷却至室温,取出,得氯化聚乙烯/聚氯乙烯复合发泡材料。
本实例操作简便,使用时,按质量份数计,取4份有机锡稳定剂、11份氯化聚乙烯/聚氯乙烯复合发泡材料、4份抗虫改性剂、2份抗冲击改性剂B522以及1.5份石蜡,充分混合均匀,加热至130℃,保温1.5h,冷却至30℃,出料造粒,送入挤出机中,在6MPa压力下挤出成型,得氯化聚乙烯/聚氯乙烯发泡板材。经检测,由于以本发明制得的氯化聚乙烯/聚氯乙烯发泡材料为原料,使得制得的氯化聚乙烯/聚氯乙烯发泡板材膨胀率提升67%,具有优越的机械力学性能。
实例3
首先按质量份数计,分别称量100份聚氯乙烯,60份邻苯二甲酸二辛酯,6份氧化锌,充分混合后,置于80℃干燥箱中进行膨润,至混合料呈松软状,得预膨润聚氯乙烯;然后将上述预膨润聚氯乙烯置入密炼机中塑化5min,密炼室温度为145℃,转子转速为70r/min,再将110份氯化聚乙烯,0.6份过氧化二异丙苯,6份丙烯酸十八酯和6份纳米碳酸钙加入密炼机,混炼10min,控制排胶温度为180℃,出料,冷却至室温,得氯化聚乙烯/聚氯乙烯母胶;接下来将上述氯化聚乙烯/聚氯乙烯母胶放在平板硫化机上,置于190℃模具中加热,在8MPa压力下,压制12min,冷却定型,得预塑化氯化聚乙烯/聚氯乙烯;最后将上述预塑化氯化聚乙烯/聚氯乙烯放入反应釜中,升温至80℃,并通入二氧化碳至压力为8MPa,浸润20min后,以0.5MPa/s泄压速率降压至常压,通入循环冷却水冷却至室温,取出,得氯化聚乙烯/聚氯乙烯复合发泡材料。
本实例操作简便,使用时,按质量份数计,取5份有机锡稳定剂、12份氯化聚乙烯/聚氯乙烯复合发泡材料、5份抗虫改性剂、3份抗冲击改性剂B522以及2份石蜡,充分混合均匀,加热至150℃,保温2h,冷却至35℃,出料造粒,送入挤出机中,在7MPa压力下挤出成型,得氯化聚乙烯/聚氯乙烯发泡板材。经检测,由于以本发明制得的氯化聚乙烯/聚氯乙烯发泡材料为原料,使得制得的氯化聚乙烯/聚氯乙烯发泡板材膨胀率提升70%,具有优越的机械力学性能。

Claims (1)

1.一种氯化聚乙烯/聚氯乙烯复合发泡材料的制备方法,其特征在于具体制备步骤为:
(1)按质量份数计,分别称量95~100份聚氯乙烯,55~60份邻苯二甲酸二辛酯,5~6份氧化锌,充分混合后,置于75~80℃干燥箱中进行膨润,至混合料呈松软状,得预膨润聚氯乙烯;
(2)将上述预膨润聚氯乙烯置入密炼机中塑化3~5min,密炼室温度为140~145℃,转子转速为60~70r/min,再将100~110份氯化聚乙烯,0.5~0.6份过氧化二异丙苯,5~6份丙烯酸十八酯和5~6份纳米碳酸钙加入密炼机,混炼7~10min,控制排胶温度为170~180℃,出料,冷却至室温,得氯化聚乙烯/聚氯乙烯母胶;
(3)将上述氯化聚乙烯/聚氯乙烯母胶放在平板硫化机上,置于185~190℃模具中加热,在7~8MPa压力下,压制10~12min,冷却定型,得预塑化氯化聚乙烯/聚氯乙烯;
(4)将上述预塑化氯化聚乙烯/聚氯乙烯放入反应釜中,升温至75~80℃,并通入二氧化碳至压力为7~8MPa,浸润15~20min后,以0.5MPa/s泄压速率降压至常压,通入循环冷却水冷却至室温,取出,得氯化聚乙烯/聚氯乙烯复合发泡材料。
CN201610469761.0A 2016-06-26 2016-06-26 一种氯化聚乙烯/聚氯乙烯复合发泡材料的制备方法 Withdrawn CN105924814A (zh)

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CN108276703A (zh) * 2018-02-26 2018-07-13 苏州甫众塑胶有限公司 一种环保型发泡薄膜的制备方法
CN108503985A (zh) * 2018-04-28 2018-09-07 安徽江淮汽车集团股份有限公司 一种pvc发泡材料及其制备方法
CN108943641A (zh) * 2017-05-22 2018-12-07 徐钰慧 中空发泡板材的制造方法
CN110439219A (zh) * 2018-05-04 2019-11-12 浙江晶通塑胶有限公司 微发泡塑胶地板及其生产工艺
WO2023010840A1 (zh) * 2021-08-03 2023-02-09 江苏大毛牛新材料有限公司 一种超临界发泡制备含氯化聚乙烯材料的方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108943641A (zh) * 2017-05-22 2018-12-07 徐钰慧 中空发泡板材的制造方法
CN108276703A (zh) * 2018-02-26 2018-07-13 苏州甫众塑胶有限公司 一种环保型发泡薄膜的制备方法
CN108503985A (zh) * 2018-04-28 2018-09-07 安徽江淮汽车集团股份有限公司 一种pvc发泡材料及其制备方法
CN110439219A (zh) * 2018-05-04 2019-11-12 浙江晶通塑胶有限公司 微发泡塑胶地板及其生产工艺
WO2023010840A1 (zh) * 2021-08-03 2023-02-09 江苏大毛牛新材料有限公司 一种超临界发泡制备含氯化聚乙烯材料的方法

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