CN106479145A - A kind of increasing stick method of modifying of PLA - Google Patents
A kind of increasing stick method of modifying of PLA Download PDFInfo
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- CN106479145A CN106479145A CN201610988938.8A CN201610988938A CN106479145A CN 106479145 A CN106479145 A CN 106479145A CN 201610988938 A CN201610988938 A CN 201610988938A CN 106479145 A CN106479145 A CN 106479145A
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- increasing stick
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of increasing stick method of modifying of PLA, which includes：(1) by PLA, poly butylene succinate, dibenzoyl peroxide and four [β (3,5 di-t-butyl, 4 hydroxy phenyl) propionic acid] pentaerythritol ester according to (80 95):(5‑20):(0.2‑0.8):The weight ratio of (0.1 1.0) is mixed, and blended prepares blended mixts；Blending temperature is 170 190 DEG C, and the blending time is 1 10min；(2) blended mixts are molded 180 195 DEG C on the vacuum mold press, under 10 15MPa, obtain the modified poly-lactic acid material of increasing stick.The present invention introduces BPO in PLA/PBS blend, improves its moment of torsion, increased apparent viscosity and the melt non-newtonian index of mixture so that the viscosity of PLA increases.
Description
Technical field
The present invention relates to technical field of modification, the increasing stick method of modifying of more particularly to a kind of PLA.
Background technology
The heat endurance of PLA (PLA, H- [OCHCH3CO] n-OH) is good, 170～230 DEG C of processing temperature, and had is anti-
Solvent borne, can be processed with various ways, such as extruding, spinning, biaxial stretch-formed, injection-blow molding.The product being made up of PLA
Decapacitation is biodegradable outer, biocompatibility, glossiness, the transparency, feel and heat-resist, and PLA (PLA) also has certain
Antibiotic property, anti-flammability and ultraviolet-resistent property, therefore purposes is quite varied, can be used as packaging material, fiber and non-woven fabric etc., main
The field such as clothes (underwear, coat) to be used for, industry (building, agricultural, forestry, papermaking) and health care.
Polylactic acid melt viscosity and melt strength relatively low, this is restricted its processing technology, especially in foaming mistake
Cheng Zhong, is easy to rupture as its relatively low melt viscosity and intensity make foam unstable, ultimately results in foaming failure.Therefore such as
What improves the melt viscosity of PLA, is necessary.
Content of the invention
It is an object of the invention to propose a kind of PLA increasing stick method of modifying, which can prepare high-viscosity material modified, and energy
Improve mechanical performance and the hot property of material.
For reaching this purpose, the present invention is employed the following technical solutions：
A kind of increasing stick method of modifying of PLA, which includes：
(1) by PLA, poly butylene succinate, dibenzoyl peroxide and four [β-(3,5 di-t-butyl -4- hydroxyls
Phenyl) propionic acid] pentaerythritol ester is according to (80-95):(5-20):(0.2-0.8):(0.1-1.0) weight ratio is mixed, warp
Blending prepares blended mixts；Blending temperature is 170-190 DEG C, and the blending time is 1-10min；
(2) blended mixts are molded 180-195 DEG C on the vacuum mold press, under 10-15MPa, obtain increasing stick modified
Poly-lactic acid material.
Dibenzoyl peroxide (BPO) is a kind of conventional radical initiator, and in research work before this, BPO is used for
Polyolefin system, the application in biodegradation material field are concentrated mainly on PLA the and PBS configuration aspects for preparing crosslinking.PLA
And the hydrogen on the end carboxyl and terminal hydroxy group of PBS molecule chain end belongs to active hydrogen, peroxide be by free radical hydrogen abstraction reaction,
Make PLA and PBS strand that a certain degree of branched and cross-linking reaction to occur.
Simply PLA and PBS blending is limited to the raising of material impact intensity, after adding BPO, the impact strength of material with
The increase of BPO content and increase.After PLA and PBS blending, the tensile strength of material reduces, but elongation at break is improved；With body
The increase of BPO content in system, material are significantly shown by the transformation of fragility to toughness, and the tensile strength of material, fracture are stretched
Long rate and Young's modulus all increase with the increase of BPO content；With the increase of PBS content, the elongation at break of blend shows
Write greatly, but tensile strength reduces.
With the increase of BPO content, the compatibility between PLA and PBS is gradually improved, but the two does not form homogeneous body
System, scattered PBS phase effectively improve the toughness of material；With the increase of PBS content, the model of matrix yielding on impact fracture surface
Increase is enclosed, stress whitening phenomenon is further obvious, illustrate that PBS phase has disperseed impact stress well, obtain the impact strength of material
To raising.
The present invention introduces BPO in PLA/PBS blend, improves its moment of torsion, increased mixture apparent viscosity and
Melt non-newtonian index so that the viscosity of PLA increases.
Specific embodiment
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
A kind of increasing stick method of modifying of PLA, which includes：
(1) by PLA, poly butylene succinate, dibenzoyl peroxide and four [β-(3,5 di-t-butyl -4- hydroxyls
Phenyl) propionic acid] pentaerythritol ester is according to 80:5:0.2:0.1 weight ratio is mixed, and blended preparing is blended mixing
Thing；Blending temperature is 170 DEG C, and the blending time is 1min；
(2) blended mixts are molded 180 DEG C on the vacuum mold press, under 10MPa, obtain the modified PLA material of increasing stick
Material.
Embodiment 2
A kind of increasing stick method of modifying of PLA, which includes：
(1) by PLA, poly butylene succinate, dibenzoyl peroxide and four [β-(3,5 di-t-butyl -4- hydroxyls
Phenyl) propionic acid] pentaerythritol ester is according to 95:20:0.8:1.0 weight ratio is mixed, and blended preparing is blended mixing
Thing；Blending temperature is 190 DEG C, and the blending time is 10min；
(2) blended mixts are molded 195 DEG C on the vacuum mold press, under 15MPa, obtain the modified PLA material of increasing stick
Material.
Embodiment 3
A kind of increasing stick method of modifying of PLA, which includes：
(1) by PLA, poly butylene succinate, dibenzoyl peroxide and four [β-(3,5 di-t-butyl -4- hydroxyls
Phenyl) propionic acid] pentaerythritol ester is according to 90:10:0.5:0.5 weight ratio is mixed, and blended preparing is blended mixing
Thing；Blending temperature is 170-190 DEG C, and the blending time is 1-10min；
(2) blended mixts are molded 185 DEG C on the vacuum mold press, under 13MPa, obtain the modified PLA material of increasing stick
Material.
Embodiment 1-3 proves, introduces BPO, improve its moment of torsion, increased the table of mixture in PLA/PBS blend
See viscosity and melt non-newtonian index so that the viscosity of PLA increases.
Claims (1)
1. the increasing stick method of modifying of a kind of PLA, which includes：
(1) by PLA, poly butylene succinate, dibenzoyl peroxide and four [β-(3,5 di-t-butyl -4- hydroxy benzenes
Base) propionic acid] pentaerythritol ester is according to (80-95):(5-20):(0.2-0.8):(0.1-1.0) weight ratio is mixed, through altogether
Mix and prepare blended mixts；Blending temperature is 170-190 DEG C, and the blending time is 1-10min；
(2) blended mixts are molded 180-195 DEG C on the vacuum mold press, under 10-15MPa, obtain the modified poly- breast of increasing stick
Sour material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610988938.8A CN106479145A (en) | 2016-11-10 | 2016-11-10 | A kind of increasing stick method of modifying of PLA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610988938.8A CN106479145A (en) | 2016-11-10 | 2016-11-10 | A kind of increasing stick method of modifying of PLA |
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| Publication Number | Publication Date |
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| CN106479145A true CN106479145A (en) | 2017-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610988938.8A Pending CN106479145A (en) | 2016-11-10 | 2016-11-10 | A kind of increasing stick method of modifying of PLA |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110483967A (en) * | 2019-08-21 | 2019-11-22 | 合肥恒鑫环保科技有限公司 | A kind of high viscosity PLA overlay film |
| CN112300549A (en) * | 2020-11-02 | 2021-02-02 | 河南龙都天仁生物材料有限公司 | Manufacturing method of electronic cigarette filter tip |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618003A (en) * | 2012-04-13 | 2012-08-01 | 中国科学院长春应用化学研究所 | Polylactic acid composition and polylactic acid product |
| CN104877316A (en) * | 2015-05-13 | 2015-09-02 | 常州龙骏天纯环保科技有限公司 | Polylactic acid composite material sheet for plastic uptake and preparation method of sheet |
| CN104910596A (en) * | 2015-05-08 | 2015-09-16 | 常州龙骏天纯环保科技有限公司 | Micro-foamed plylactic acid material and preparation method thereof |
-
2016
- 2016-11-10 CN CN201610988938.8A patent/CN106479145A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618003A (en) * | 2012-04-13 | 2012-08-01 | 中国科学院长春应用化学研究所 | Polylactic acid composition and polylactic acid product |
| CN104910596A (en) * | 2015-05-08 | 2015-09-16 | 常州龙骏天纯环保科技有限公司 | Micro-foamed plylactic acid material and preparation method thereof |
| CN104877316A (en) * | 2015-05-13 | 2015-09-02 | 常州龙骏天纯环保科技有限公司 | Polylactic acid composite material sheet for plastic uptake and preparation method of sheet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110483967A (en) * | 2019-08-21 | 2019-11-22 | 合肥恒鑫环保科技有限公司 | A kind of high viscosity PLA overlay film |
| CN112300549A (en) * | 2020-11-02 | 2021-02-02 | 河南龙都天仁生物材料有限公司 | Manufacturing method of electronic cigarette filter tip |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170308 |
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