mPEG-PLA PEG MW:5000&PLA MW:10000，mPEG-PCL PEG MW:1000&PCL MW:1000

我们非常乐于倾听您的需求，并一如既往地继续为您提供优质的产品和服务。

公   司：西安凯新生物科技有限公司
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技术指标：

纯度（PEG）：95%以上

取代率（FITC）：90%以上

取代率（NHS）：90%以上

分散系数（PDI）：小于等于1.05

物理性质：

状态：粉红色或暗红色的固体或粘稠液体,取决于分子量。

溶解性：溶于大部分有机溶剂，溶于水。

保存条件：-20℃长期保存，避光，干燥。

mPEG-PLA PEG MW:5000&PLA MW:10000，mPEG-PCL PEG MW:1000&PCL MW:1000

其他Copolymer PEGs产品：

mPEG-PLA, PEG MW:1000&PLA MW:1000

mPEG-PLA, PEG MW:750&PLA MW:1000

mPEG-PLA, PEG MW:1000&PLA MW:2000

mPEG-PLA, PEG MW:1000&PLA MW:5000

mPEG-PLA, PEG MW:1000&PLA MW:10000

mPEG-PLA, PEG MW:2000&PLA MW:2000

mPEG-PLA, PEG MW:2000&PLA MW:5000

mPEG-PLA, PEG MW:2000&PLA MW:10000

mPEG-PLA, PEG MW:5000&PLA MW:2000

mPEG-PLA, PEG MW:5000&PLA MW:5000

mPEG-PLA, PEG MW:5000&PLA MW:10000

mPEG-PCL, PEG MW:1000&PCL MW:1000

mPEG-PCL, PEG MW:1000&PCL MW:2000

mPEG-PCL, PEG MW:1000&PCL MW:5000

mPEG-PCL, PEG MW:1000&PCL MW:10000

mPEG-PCL, PEG MW:2000&PCL MW:2000

mPEG-PCL, PEG MW:2000&PCL MW:5000

mPEG-PCL, PEG MW:2000&PCL MW:10000

mPEG-PCL, PEG MW:5000&PCL MW:2000

mPEG-PCL, PEG MW:5000&PCL MW:5000

mPEG-PCL, PEG MW:5000&PCL MW:10000

mPEG-PLGA, PEG MW:1000&PCL MW:1000

mPEG-PLGA, PEG MW:1000&PCL MW:2000

mPEG-PLGA, PEG MW:1000&PCL MW:5000

mPEG-PLGA, PEG MW:1000&PCL MW:10000

mPEG-PLGA, PEG MW:2000&PCL MW:2000

mPEG-PLGA, PEG MW:2000&PCL MW:5000

mPEG-PLGA, PEG MW:2000&PCL MW:10000

mPEG-PLGA, PEG MW:5000&PCL MW:2000

mPEG-PLGA, PEG MW:5000&PCL MW:5000

mPEG-PLGA, PEG MW:5000&PCL MW:10000

PLA(1000)-PEG(1000)-PLA(1000)

PLA(2000)-PEG(1000)-PLA(2000)

PLA(5000)-PEG(1000)-PLA(5000)

PLA(1000)-PEG(2000)-PLA(1000)

PLA(2000)-PEG(2000)-PLA(2000)

PLA(5000)-PEG(2000)-PLA(5000)

PLA(10000)-PEG(2000)-PLA(10000)

PLA(1000)-PEG(5000)-PLA(1000)

PLA(2000)-PEG(5000)-PLA(2000)

PLA(5000)-PEG(5000)-PLA(5000)

PLA(10000)-PEG(5000)-PLA(10000)

PLA(1000)-PEG(10000)-PLA(1000)

PLA(2000)-PEG(10000)-PLA(2000)

PLA(5000)-PEG(10000)-PLA(5000)

PLA(10000)-PEG(10000)-PLA(10000)

PCL(1000)-PEG(1000)-PCL(1000)

PCL(2000)-PEG(1000)-PCL(2000)

PCL(5000)-PEG(1000)-PCL(5000)

PCL(1000)-PEG(2000)-PCL(1000)

PCL(2000)-PEG(2000)-PCL(2000)

PCL(5000)-PEG(2000)-PCL(5000)

PCL(10000)-PEG(2000)-PCL(10000)

PCL(1000)-PEG(5000)-PCL(1000)

PCL(2000)-PEG(5000)-PCL(2000)

PCL(5000)-PEG(5000)-PCL(5000)

PCL(10000)-PEG(5000)-PCL(10000)

PCL(1000)-PEG(10000)-PCL(1000)

PCL(2000)-PEG(10000)-PCL(2000)

PCL(5000)-PEG(10000)-PCL(5000)

PCL(10000)-PEG(10000)-PCL(10000)

PLGA (1000)-PEG(1000)-PLGA (1000)

PLGA (2000)-PEG(1000)-PLGA (2000)

PLGA (5000)-PEG(1000)-PLGA (5000)

PLGA (1000)-PEG(2000)-PLGA (1000)

PLGA (2000)-PEG(2000)-PLGA (2000)

PLGA (5000)-PEG(2000)-PLGA (5000)

PLGA (10000)-PEG(2000)-PLGA (10000)

PLGA (1000)-PEG(5000)-PLGA (1000)

PLGA (2000)-PEG(5000)-PLGA 2000)

PLGA (5000)-PEG(5000)-PLGA (5000)

PLGA (10000)-PEG(5000)-PLGA (10000)

PLGA (1000)-PEG(10000)-PLGA (1000)

PLGA (2000)-PEG(10000)-PLGA (2000)

PLGA (5000)-PEG(10000)-PLGA (5000)

PLGA (10000)-PEG(10000)-PLGA (10000)

PLA(1000)-PEG(1000)-NH2

PLA(2000)-PEG(1000)-NH2

PLA(5000)-PEG(1000)-NH2

PLA(10000)-PEG(1000)-NH2

PLA(1000)-PEG(2000)-NH2

PLA(2000)-PEG(2000)-NH2

PLA(5000)-PEG(2000)-NH2

PLA(10000)-PEG(2000)-NH2

PLA(1000)-PEG(5000)-NH2

PLA(2000)-PEG(5000)-NH2

PLA(5000)-PEG(5000)-NH2

PLA(10000)-PEG(5000)-NH2

PLA(1000)-PEG(10000)-NH2

PLA(2000)-PEG(10000)-NH2

PLA(5000)-PEG(10000)-NH2

PLA(10000)-PEG(10000)-NH2

PLA(1000)-PEG(1000)-COOH

PLA(2000)-PEG(1000)-COOH

PLA(5000)-PEG(1000)-COOH

PLA(10000)-PEG(1000)-COOH

PLA(1000)-PEG(2000)-COOH

PLA(2000)-PEG(2000)-COOH

PLA(5000)-PEG(2000)-COOH

PLA(10000)-PEG(2000)-COOH

PLA(1000)-PEG(5000)-COOH

PLA(2000)-PEG(5000)-COOH

PLA(5000)-PEG(5000)-COOH

PLA(10000)-PEG(5000)-COOH

PLA(1000)-PEG(10000)-COOH

PLA(2000)-PEG(10000)-COOH

PLA(5000)-PEG(10000)-COOH

PLA(10000)-PEG(10000)-COOH

PLA(1000)-PEG(1000)-MAL

PLA(2000)-PEG(1000)-MAL

PLA(5000)-PEG(1000)-MAL

PLA(10000)-PEG(1000)-MAL

PLA(1000)-PEG(2000)-MAL

PLA(2000)-PEG(2000)-MAL

PLA(10000)-PEG(2000)-MAL

PLA(1000)-PEG(5000)-MAL

PLA(2000)-PEG(5000)-MAL

PLA(5000)-PEG(5000)-MAL

PLA(10000)-PEG(5000)-MAL

PLA(1000)-PEG(10000)-MAL

PLA(2000)-PEG(10000)-MAL

PLA(5000)-PEG(10000)-MAL

PLA(10000)-PEG(10000)-MAL

PLA(1000)-PEG(1000)-Biotin

PLA(2000)-PEG(1000)-Biotin

PLA(5000)-PEG(1000)-Biotin

PLA(10000)-PEG(1000)-Biotin

PLA(1000)-PEG(2000)-Biotin

PLA(2000)-PEG(2000)-Biotin

PLA(5000)-PEG(2000)-Biotin

PLA(10000)-PEG(2000)-Biotin

PLA(1000)-PEG(5000)-Biotin

PLA(2000)-PEG(5000)-Biotin

PLA(5000)-PEG(5000)-Biotin

PLA(10000)-PEG(5000)-Biotin

PLA(1000)-PEG(10000)-Biotin

PLA(2000)-PEG(10000)-Biotin

PLA(5000)-PEG(10000)-Biotin

PLA(10000)-PEG(10000)-Biotin

PLA(1000)-PEG(1000)-NHS

PLA(2000)-PEG(1000)-NHS

PLA(5000)-PEG(1000)-NHS

PLA(10000)-PEG(1000)-NHS

PLA(1000)-PEG(2000)-NHS

PLA(2000)-PEG(2000)-NHS

PLA(5000)-PEG(2000)-NHS

PLA(10000)-PEG(2000)-NHS

PLA(1000)-PEG(5000)-NHS

PLA(2000)-PEG(5000)-NHS

PLA(5000)-PEG(5000)-NHS

PLA(10000)-PEG(5000)-NHS

PLA(1000)-PEG(10000)-NHS

PLA(2000)-PEG(10000)-NHS

PLA(5000)-PEG(10000)-NHS

PLA(10000)-PEG(10000)-NHS

PLA(1000)-PEG(1000)-N3

PLA(2000)-PEG(1000)-N3

PLA(5000)-PEG(1000)-N3

PLA(10000)-PEG(1000)-N3

PLA(1000)-PEG(2000)-N3

PLA(2000)-PEG(2000)-N3

PLA(5000)-PEG(2000)-N3

PLA(10000)-PEG(2000)-N3

PLA(1000)-PEG(5000)-N3

PLA(2000)-PEG(5000)-N3

PLA(5000)-PEG(5000)-N3

PLA(10000)-PEG(5000)-N3

PLA(1000)-PEG(10000)-N3

PLA(2000)-PEG(10000)-N3

PLA(5000)-PEG(10000)-N3

PLA(10000)-PEG(10000)-N3

PLA(1000)-PEG(1000)-FITC

PLA(2000)-PEG(1000)-FITC

PLA(5000)-PEG(1000)-FITC

PLA(10000)-PEG(1000)-FITC

PLA(1000)-PEG(2000)-FITC

PLA(2000)-PEG(2000)-FITC

PLA(5000)-PEG(2000)-FITC

PLA(10000)-PEG(2000)-FITC

PLA(1000)-PEG(5000)-FITC

PLA(2000)-PEG(5000)-FITC

PLA(5000)-PEG(5000)-FITC

PLA(10000)-PEG(5000)-FITC

PLA(1000)-PEG(10000)-FITC

PLA(2000)-PEG(10000)-FITC

PLA(5000)-PEG(10000)-FITC

PLA(10000)-PEG(10000)-FITC

PLA(1000)-PEG(1000)-SH

PLA(2000)-PEG(1000)-SH

PLA(5000)-PEG(1000)-SH

PLA(10000)-PEG(1000)-SH

PLA(1000)-PEG(2000)-SH

PLA(2000)-PEG(2000)-SH

PLA(5000)-PEG(2000)-SH

PLA(10000)-PEG(2000)-SH

PLA(1000)-PEG(5000)-SH

PLA(2000)-PEG(5000)-SH

PLA(5000)-PEG(5000)-SH

PLA(10000)-PEG(5000)-SH

PLA(1000)-PEG(10000)-SH

PLA(2000)-PEG(10000)-SH

PLA(5000)-PEG(10000)-SH

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PCL(1000)-PEG(1000)-NH2

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PCL(5000)-PEG(1000)-NH2

PCL(10000)-PEG(1000)-NH2

PCL(1000)-PEG(2000)-NH2

PCL(2000)-PEG(2000)-NH2

PCL(5000)-PEG(2000)-NH2

PCL(10000)-PEG(2000)-NH2

PCL(1000)-PEG(5000)-NH2

PCL(2000)-PEG(5000)-NH2

PCL(5000)-PEG(5000)-NH2

PCL(10000)-PEG(5000)-NH2

PCL(1000)-PEG(10000)-NH2

PCL(2000)-PEG(10000)-NH2

PCL(5000)-PEG(10000)-NH2

PCL(10000)-PEG(10000)-NH2

PCL(1000)-PEG(1000)-COOH

PCL(2000)-PEG(1000)-COOH

PCL(5000)-PEG(1000)-COOH

PCL(10000)-PEG(1000)-COOH

PCL(1000)-PEG(2000)-COOH

PCL(2000)-PEG(2000)-COOH

PCL(5000)-PEG(2000)-COOH

PCL(10000)-PEG(2000)-COOH

PCL(1000)-PEG(5000)-COOH

PCL(2000)-PEG(5000)-COOH

PCL(5000)-PEG(5000)-COOH

PCL(10000)-PEG(5000)-COOH

PCL(1000)-PEG(10000)-COOH

PCL(2000)-PEG(10000)-COOH

PCL(5000)-PEG(10000)-COOH

PCL(10000)-PEG(10000)-COOH

PCL(1000)-PEG(1000)-MAL

PCL(2000)-PEG(1000)-MAL

PCL(5000)-PEG(1000)-MAL

PCL(10000)-PEG(1000)-MAL

PCL(1000)-PEG(2000)-MAL

PCL(2000)-PEG(2000)-MAL

PCL(5000)-PEG(2000)-MAL

PCL(10000)-PEG(2000)-MAL

PCL(1000)-PEG(5000)-MAL

PCL(2000)-PEG(5000)-MAL

PCL(5000)-PEG(5000)-MAL

PCL(10000)-PEG(5000)-MAL

PCL(1000)-PEG(10000)-MAL

PCL(2000)-PEG(10000)-MAL

PCL(5000)-PEG(10000)-MAL

PCL(10000)-PEG(10000)-MAL

PCL(1000)-PEG(1000)-Biotin

PCL(2000)-PEG(1000)-Biotin

PCL(5000)-PEG(1000)-Biotin

PCL(10000)-PEG(1000)-Biotin

PCL(1000)-PEG(2000)-Biotin

PCL(2000)-PEG(2000)-Biotin

PCL(5000)-PEG(2000)-Biotin

PCL(10000)-PEG(2000)-Biotin

PCL(1000)-PEG(5000)-Biotin

PCL(2000)-PEG(5000)-Biotin

PCL(5000)-PEG(5000)-Biotin

PCL(10000)-PEG(5000)-Biotin

PCL(1000)-PEG(10000)-Biotin

PCL(2000)-PEG(10000)-Biotin

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PCL(10000)-PEG(10000)-Biotin

PCL(1000)-PEG(1000)-NHS

PCL(2000)-PEG(1000)-NHS

PCL(5000)-PEG(1000)-NHS

PCL(10000)-PEG(1000)-NHS

PCL(1000)-PEG(2000)-NHS

PCL(2000)-PEG(2000)-NHS

PCL(5000)-PEG(2000)-NHS

PCL(10000)-PEG(2000)-NHS

PCL(1000)-PEG(5000)-NHS

PCL(2000)-PEG(5000)-NHS

PCL(5000)-PEG(5000)-NHS

PCL(10000)-PEG(5000)-NHS

PCL(1000)-PEG(10000)-NHS

PCL(2000)-PEG(10000)-NHS

PCL(5000)-PEG(10000)-NHS

PCL(10000)-PEG(10000)-NHS

PCL(1000)-PEG(1000)-N3

PCL(2000)-PEG(1000)-N3

PCL(5000)-PEG(1000)-N3

PCL(10000)-PEG(1000)-N3

PCL(1000)-PEG(2000)-N3

PCL(2000)-PEG(2000)-N3

PCL(5000)-PEG(2000)-N3

PCL(10000)-PEG(2000)-N3

PCL(1000)-PEG(5000)-N3

PCL(2000)-PEG(5000)-N3

PCL(5000)-PEG(5000)-N3

PCL(10000)-PEG(5000)-N3

PCL(1000)-PEG(10000)-N3

PCL(2000)-PEG(10000)-N3

PCL(5000)-PEG(10000)-N3

PCL(10000)-PEG(10000)-N3

PCL(1000)-PEG(1000)-FITC

PCL(2000)-PEG(1000)-FITC

PCL(5000)-PEG(1000)-FITC

PCL(10000)-PEG(1000)-FITC

PCL(1000)-PEG(2000)-FITC

PCL(2000)-PEG(2000)-FITC

PCL(5000)-PEG(2000)-FITC

PCL(10000)-PEG(2000)-FITC

PCL(1000)-PEG(5000)-FITC

PCL(2000)-PEG(5000)-FITC

PCL(5000)-PEG(5000)-FITC

PCL(10000)-PEG(5000)-FITC

PCL(1000)-PEG(10000)-FITC

PCL(2000)-PEG(10000)-FITC

PCL (5000)-PEG(10000)-FITC

PCL(10000)-PEG(10000)-FITC

PCL(1000)-PEG(1000)-SH

PCL(2000)-PEG(1000)-SH

PCL(5000)-PEG(1000)-SH

PCL(10000)-PEG(1000)-SH

PCL(1000)-PEG(2000)-SH

PCL(2000)-PEG(2000)-SH

PCL(5000)-PEG(2000)-SH

PCL(10000)-PEG(2000)-SH

PCL(1000)-PEG(5000)-SH

PCL(2000)-PEG(5000)-SH

PCL(5000)-PEG(5000)-SH

PCL(10000)-PEG(5000)-SH

PCL(1000)-PEG(10000)-SH

PCL(2000)-PEG(10000)-SH

PCL(5000)-PEG(10000)-SH

PCL(10000)-PEG(10000)-SH

PLGA(1000)-PEG(1000)-NH2

PLGA(2000)-PEG(1000)-NH2

PLGA(5000)-PEG(1000)-NH2

PLGA(10000)-PEG(1000)-NH2

PLGA(1000)-PEG(2000)-NH2

PLGA(2000)-PEG(2000)-NH2

PLGA(5000)-PEG(2000)-NH2

PLGA(10000)-PEG(2000)-NH2

PLGA(1000)-PEG(5000)-NH2

PLGA(2000)-PEG(5000)-NH2

PLGA(5000)-PEG(5000)-NH2

PLGA(10000)-PEG(5000)-NH2

PLGA(1000)-PEG(10000)-NH2

PLGA(2000)-PEG(10000)-NH2

PLGA(5000)-PEG(10000)-NH2

PLGA(10000)-PEG(10000)-NH2

PLGA(1000)-PEG(1000)-COOH

PLGA(2000)-PEG(1000)-COOH

PLGA(5000)-PEG(1000)-COOH

PLGA(10000)-PEG(1000)-COOH

PLGA(1000)-PEG(2000)-COOH

PLGA(2000)-PEG(2000)-COOH

PLGA(5000)-PEG(2000)-COOH

PLGA(10000)-PEG(2000)-COOH

PLGA(1000)-PEG(5000)-COOH

PLGA(2000)-PEG(5000)-COOH

PLGA(5000)-PEG(5000)-COOH

PLGA(10000)-PEG(5000)-COOH

PLGA(1000)-PEG(10000)-COOH

PLGA(2000)-PEG(10000)-COOH

PLGA(5000)-PEG(10000)-COOH

PLGA(10000)-PEG(10000)-COOH

PLGA(1000)-PEG(1000)-MAL

PLGA(2000)-PEG(1000)-MAL

PLGA(5000)-PEG(1000)-MAL

PLGA(10000)-PEG(1000)-MAL

PLGA(1000)-PEG(2000)-MAL

PLGA(2000)-PEG(2000)-MAL

PLGA(5000)-PEG(2000)-MAL

PLGA(10000)-PEG(2000)-MAL

PLGA(1000)-PEG(5000)-MAL

PLGA(2000)-PEG(5000)-MAL

PLGA(5000)-PEG(5000)-MAL

PLGA(10000)-PEG(5000)-MAL

PLGA(1000)-PEG(10000)-MAL

PLGA(2000)-PEG(10000)-MAL

PLGA(5000)-PEG(10000)-MAL

PLGA(10000)-PEG(10000)-MAL

PLGA(1000)-PEG(1000)-Biotin

PLGA(2000)-PEG(1000)-Biotin

PLGA(5000)-PEG(1000)-Biotin

PLGA(10000)-PEG(1000)-Biotin

PLGA(1000)-PEG(2000)-Biotin

PLGA(2000)-PEG(2000)-Biotin

PLGA(5000)-PEG(2000)-Biotin

PLGA(10000)-PEG(2000)-Biotin

PLGA(1000)-PEG(5000)-Biotin

PLGA(2000)-PEG(5000)-Biotin

PLGA(5000)-PEG(5000)-Biotin

PLGA(10000)-PEG(5000)-Biotin

PLGA(1000)-PEG(10000)-Biotin

PLGA(2000)-PEG(10000)-Biotin

PLGA(5000)-PEG(10000)-Biotin

PLGA(10000)-PEG(10000)-Biotin

PLGA(1000)-PEG(1000)-NHS

PLGA(2000)-PEG(1000)-NHS

PLGA(5000)-PEG(1000)-NHS

PLGA(10000)-PEG(1000)-NHS

PLGA(1000)-PEG(2000)-NHS

PLGA(2000)-PEG(2000)-NHS

PLGA(5000)-PEG(2000)-NHS

PLGA(10000)-PEG(2000)-NHS

PLGA(1000)-PEG(5000)-NHS

PLGA(2000)-PEG(5000)-NHS

PLGA(5000)-PEG(5000)-NHS

PLGA(10000)-PEG(5000)-NHS

PLGA(1000)-PEG(10000)-NHS

PLGA(2000)-PEG(10000)-NHS

PLGA(5000)-PEG(10000)-NHS

PLGA(10000)-PEG(10000)-NHS

PLGA(1000)-PEG(1000)-N3

PLGA(2000)-PEG(1000)-N3

PLGA(5000)-PEG(1000)-N3

PLGA(1000)-PEG(2000)-N3

PLGA(2000)-PEG(2000)-N3

PLGA(5000)-PEG(2000)-N3

PLGA(10000)-PEG(2000)-N3

PLGA(1000)-PEG(5000)-N3

PLGA(2000)-PEG(5000)-N3

PLGA(5000)-PEG(5000)-N3

PLGA(10000)-PEG(5000)-N3

PLGA(1000)-PEG(10000)-N3

PLGA(2000)-PEG(10000)-N3

PLGA(5000)-PEG(10000)-N3

PLGA(10000)-PEG(10000)-N3

PLGA(1000)-PEG(1000)-FITC

PLGA(2000)-PEG(1000)-FITC

PLGA(5000)-PEG(1000)-FITC

PLGA(10000)-PEG(1000)-FITC

PLGA(1000)-PEG(2000)-FITC

PLGA(2000)-PEG(2000)-FITC

PLGA(5000)-PEG(2000)-FITC

PLGA(10000)-PEG(2000)-FITC

PLGA(1000)-PEG(5000)-FITC

PLGA(2000)-PEG(5000)-FITC

PLGA(5000)-PEG(5000)-FITC

PLGA(10000)-PEG(5000)-FITC

PLGA(1000)-PEG(10000)-FITC

PLGA(2000)-PEG(10000)-FITC

PLGA(5000)-PEG(10000)-FITC

PLGA(10000)-PEG(10000)-FITC

PLGA(1000)-PEG(1000)-SH

PLGA(2000)-PEG(1000)-SH

PLGA(5000)-PEG(1000)-SH

PLGA(10000)-PEG(1000)-SH

PLGA(1000)-PEG(2000)-SH

PLGA(2000)-PEG(2000)-SH

PLGA(5000)-PEG(2000)-SH

PLGA(10000)-PEG(2000)-SH

PLGA(1000)-PEG(5000)-SH

PLGA(2000)-PEG(5000)-SH

PLGA(5000)-PEG(5000)-SH

PLGA(10000)-PEG(5000)-SH

PLGA(1000)-PEG(10000)-SH

PLGA(2000)-PEG(10000)-SH

PLGA(5000)-PEG(10000)-SH

PLGA(10000)-PEG(10000)-SH

PLGA(1000)-PEG(1000)-FA

PLGA(2000)-PEG(1000)-FA

PLGA(5000)-PEG(1000)-FA

PLGA(10000)-PEG(1000)-FA

PLGA(1000)-PEG(2000)-FA

PLGA(5000)-PEG(2000)-FA

PLGA(10000)-PEG(2000)-FA

PLGA(1000)-PEG(5000)-FA

PLGA(2000)-PEG(5000)-FA

PLGA(5000)-PEG(5000)-FA

PLGA(10000)-PEG(5000)-FA

PLGA(1000)-PEG(10000)-FA

PLGA(2000)-PEG(10000)-FA

PLGA(5000)-PEG(10000)-FA

PLGA(10000)-PEG(10000)-FA

，mPEG-PCL PEG MW:1000&PCL MW:1000