CN111763413A - 可完全生物降解聚酯共混物及其制备方法 - Google Patents
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Abstract
本发明提供一种可完全生物降解聚酯共混物及其制备方法,属于可降解材料领域。该共混物,按照重量份数计,包括如下组分:原料A:聚丁二酸丁二醇酯或聚乳酸3‑13份,原料B:聚酯1‑7份。本发明还提供一种可完全生物降解聚酯共混物的制备方法,具体包括:先将原料A和原料B按照上述比例称好后,在搅拌机中室温进行混合10分钟,之后加入挤出机,加热进行挤出、造粒,即得成品。该聚酯共混物韧性高且具有良好的阻隔性。
Description
发明领域
本发明属于可降解材料领域,具体涉及一种可完全生物降解聚酯共混物及其制备方法。
背景技术
由于石油资源的紧缺及环境污染等问题,生物基聚酯日益受到人们的重视。其中许多的生物基聚酯已经被工业化,例如聚乳酸,聚丁二酸丁二醇酯,聚呋喃二甲酸乙二醇酯。
聚丁二酸丁二醇酯(PBS),通常由丁二酸和丁二醇经缩聚而成,是一种可完全降解的脂肪族聚酯,熔点为110℃左右,通常其结晶度在30-60%,热变形温度可超过100℃,原料丁二酸和丁二醇都可从生物质资源获得,目前,已经被产业化。但是其冲击韧性较差,约为17kJ/m2,限制了其更广泛的应用,难以满足各种用途的要求。
聚乳酸,也是一种完全可降解的聚酯,其玻璃化转变温度是50到60之间,熔点170到180摄氏度之间。由于聚乳酸比较脆,抗冲击性差,故需要对PLA进行改性,使其应用到更多的领域。
聚(2,5-呋喃二甲酸-丁二酸)丁二醇酯(PBSF)和聚(2,5-呋喃二甲酸-己二酸)丁二醇酯(PBAF),是由呋喃二甲酸、丁二醇、丁二酸或己二酸反应合成的全生物基可生物降解聚酯,它们具有良好的韧性、可生物降解性。
因此,在本领域需要具有改善韧性的聚酯共混物,其具有良好的韧性。
发明内容
本发明目的是提供一种可完全生物降解聚酯共混物及其制备方法,该聚酯共混物韧性高且具有良好的阻隔性。
本发明首先提供一种可完全生物降解聚酯共混物,按照重量份数计,包括如下组分:
原料A:聚丁二酸丁二醇酯或聚乳酸 3-13份
原料B:聚酯 1-7份
优选的是,所述的聚酯是由2,5-呋喃二甲酸、丁二酸或己二酸和1,4-丁二醇制备得到的。
优选的是,所述的聚酯的制备方法具体包括:将1,4-丁二醇、钛酸四丁酯、2,5-呋喃二甲酸、丁二酸或己二酸加入到反应瓶中,通氮气,在220-240℃,机械搅拌,反应2-4小时,之后抽真空,反应4-6小时,停止反应,即得聚酯。
优选的是,所述的1,4-丁二醇与总二元酸的摩尔比为3:1,所述的总二元酸为2,5-呋喃二甲酸和丁二酸,或者2,5-呋喃二甲酸和己二酸的总和,2,5-呋喃二甲酸与丁二酸或己二酸的摩尔比为0.25-4:1,钛酸四丁酯为2,5-呋喃二甲酸质量的5‰。
优选的是,所述的反应温度为230℃,反应时间为3h,之后抽真空,反应5h。
本发明还提供一种可完全生物降解聚酯共混物的制备方法,具体包括:先将原料A和原料B按照上述比例称好后,在搅拌机中室温进行混合10分钟,之后加入挤出机,加热进行挤出、造粒,即得成品。
优选的是,所述的挤出温度为160-200℃。
本发明的有益效果
1.本发明首次提供了PBSF(PBAF)与PBS/PLA共混物及其制备方法,工艺简单,性能优异。
2.PBSF(PBAF)、PBS、PLA都属于全生物基可生物降解聚酯,可增加生物质资源的综合利用。
3.PBSF(PBAF)具有良好的韧性和阻隔性能,PBSF(PBAF)与PBS、PLA都属于聚酯,结构类似,具有好的相容性。因此,PBSF(PBAF)可提高PBS或PLA的韧性和阻隔性能。使用该类聚酯共混物制备的产品,可综合不同聚酯的优点,得到不同物理性能的产品,从而满足不同行业的需求。
具体实施方式
下面结合具体实施例对本发明做进一步详细的描述,实施例中涉及到的原料均为商购获得。
PBS:熔融指数:5g/10min,测试条件为190℃,2.16Kg,购自安庆和兴化工有限责任公司。
PLA:4032D,购自美国NatureWorks公司。
实施例1PBSF的制备
将1,4-丁二醇、钛酸四丁酯、2,5-呋喃二甲酸、丁二酸加入到反应瓶中,1,4-丁二醇与总二元酸(2,5-呋喃二甲酸和丁二酸)的摩尔比为3:1,2,5-呋喃二甲酸与丁二酸的摩尔比为3:2。钛酸四丁酯为2,5-呋喃二甲酸质量的5‰。通氮气,在230℃,机械搅拌,反应3小时。之后抽真空,反应5小时,停止反应,即得产品。
实施例2PBAF的制备
将1,4-丁二醇、钛酸四丁酯、2,5-呋喃二甲酸、己二酸加入到反应瓶中,1,4-丁二醇与总二元酸(2,5-呋喃二甲酸和己二酸)的摩尔比为3:1,2,5-呋喃二甲酸与己二酸的摩尔比为3:2。钛酸四丁酯为2,5-呋喃二甲酸质量的5‰。通氮气,在230℃,机械搅拌,反应3小时。之后抽真空,反应5小时,停止反应,即得产品。
实施例3
将PBS和实施例2制备的聚酯按照质量比4:1称好后,在搅拌机中室温进行混合10分钟,之后加入挤出机,加热进行挤出、造粒,挤出机和注塑机的温度为170℃,即得成品。
实施例3制备的产品性能如表1所示,其中拉伸性能按GB/T 1040-92进行测试,选用I型样条,拉伸速度为50mm/min;冲击性能按ASTM D256进行测试。
采用Labthink VAC-V2气体透过测试仪测定,温度23℃,湿度50%,薄膜直径为97mm,测试面积为38.5cm2,测试三次取平均值,薄膜的氧气和二氧化碳透过率见表1。
实施例4
将PBS和实施例2制备的聚酯按照质量比9:1比例称好后,在搅拌机中室温进行混合10分钟,之后加入挤出机,加热进行挤出、造粒,挤出机和注塑机的温度为170℃,即得成品。
实施例4制备的产品性能如表1所示。
实施例5
将PBS和实施例1制备的聚酯按照质量比7:3比例称好后,在搅拌机中室温进行混合10分钟,之后加入挤出机,加热进行挤出、造粒,挤出机和注塑机的温度为170℃,即得成品。
实施例5制备的产品性能如表1所示。
实施例6
将PLA和实施例1制备的聚酯按照质量比3:1比例称好后,在搅拌机中室温进行混合10分钟,之后加入挤出机,加热进行挤出、造粒,挤出机和注塑机的温度为170℃,即得成品。
实施例6制备的产品性能如表1所示。
实施例7
将PLA和实施例1制备的聚酯按照质量比13:7比例称好后,在搅拌机中室温进行混合10分钟,之后加入挤出机,加热进行挤出、造粒,挤出机和注塑机的温度为180℃,即得成品。
实施例7制备的产品性能如表1所示。
表1实施例和对比例样品的物理性能
abarrer=10-10cm3·cm/cm2·s·cmHg.
从表1可以看出,随着PBSF(PBAF)的引入,与纯PBS/PLA相比,断裂伸长率和缺口冲击强度都大幅度增加,说明引入PBSF(PBAF)可明显增加其韧性。同时,与纯PBS/PLA相比,由于PBSF(PBAF)中含有呋喃环结构,不利于分子链的运动,因此,实施例3-7的CO2和O2的透过率都明显降低,阻隔性更好。
Claims (7)
1.一种可完全生物降解聚酯共混物,其特征在于,按照重量份数计,包括如下组分:
原料A:聚丁二酸丁二醇酯或聚乳酸 3-13份
原料B:聚酯 1-7份。
2.根据权利要求1所述的一种可完全生物降解聚酯共混物,其特征在于,所述的聚酯是由2,5-呋喃二甲酸、丁二酸或己二酸和1,4-丁二醇制备得到的。
3.根据权利要求2所述的一种可完全生物降解聚酯共混物,其特征在于,所述的聚酯的制备方法具体包括:将1,4-丁二醇、钛酸四丁酯、2,5-呋喃二甲酸、丁二酸或己二酸加入到反应瓶中,通氮气,在220-240℃,机械搅拌,反应2-4小时,之后抽真空,反应4-6小时,停止反应,即得聚酯。
4.根据权利要求3所述的一种可完全生物降解聚酯共混物,其特征在于,所述的1,4-丁二醇与总二元酸的摩尔比为3:1,所述的总二元酸为2,5-呋喃二甲酸和丁二酸,或者2,5-呋喃二甲酸和己二酸的总和,2,5-呋喃二甲酸与丁二酸或己二酸的摩尔比为0.25-4:1,钛酸四丁酯为2,5-呋喃二甲酸质量的5‰。
5.根据权利要求3所述的一种可完全生物降解聚酯共混物,其特征在于,所述的反应温度为230℃,反应时间为3h,之后抽真空,反应5h。
6.根据权利要求1所述的一种可完全生物降解聚酯共混物的制备方法,其特征在于,具体包括:先将原料A和原料B按照上述比例称好后,在搅拌机中室温进行混合10分钟,之后加入挤出机,加热进行挤出、造粒,即得成品。
7.根据权利要求6所述的一种可完全生物降解聚酯共混物的制备方法,其特征在于,所述的挤出温度为160-200℃。
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